From e7a1312b0b264603a5344bf7787082b54e0b6fdb Mon Sep 17 00:00:00 2001
From: Andres Senac <andres@senac.es>
Date: Fri, 5 Jan 2024 01:28:41 +0100
Subject: [PATCH] Get rid of CorrelationId, use context offset instead

---
 src/query_graph/explain.rs                    |   3 +-
 src/query_graph/json.rs                       |   3 +-
 src/query_graph/mod.rs                        |  13 --
 .../properties/correlated_input_refs.rs       |  76 +++----
 src/scalar_expr/mod.rs                        |  41 ++--
 src/scalar_expr/rewrite.rs                    |  42 ++--
 tests/explain_test.rs                         |  44 +---
 tests/testdata/explain/apply.test             | 120 +++++------
 tests/testdata/explain/correlated_filter.test | 204 ++++++++----------
 .../testdata/explain/correlated_project.test  |  58 ++---
 10 files changed, 262 insertions(+), 342 deletions(-)

diff --git a/src/query_graph/explain.rs b/src/query_graph/explain.rs
index 4dd0d9a..74ba6eb 100644
--- a/src/query_graph/explain.rs
+++ b/src/query_graph/explain.rs
@@ -170,10 +170,9 @@ impl<'a> QueryGraphPrePostVisitor for ExplainVisitor<'a> {
                 ..
             } => {
                 format!(
-                    "{}{} Apply correlation_id: {}, parameters: [{}]\n",
+                    "{}{} Apply parameters: [{}]\n",
                     prefix,
                     apply_type,
-                    correlation.correlation_id.0,
                     explain_scalar_expr_vec(&correlation.parameters),
                 )
             }
diff --git a/src/query_graph/json.rs b/src/query_graph/json.rs
index f4e16f2..5ae5ded 100644
--- a/src/query_graph/json.rs
+++ b/src/query_graph/json.rs
@@ -117,10 +117,9 @@ impl<'a> QueryGraphPrePostVisitor for JsonSerializer<'a> {
                 ..
             } => {
                 format!(
-                    "{}{} Apply correlation_id: {}, parameters: [{}]",
+                    "{}{} Apply parameters: [{}]",
                     prefix,
                     apply_type,
-                    correlation.correlation_id.0,
                     explain_scalar_expr_vec(&correlation.parameters),
                 )
             }
diff --git a/src/query_graph/mod.rs b/src/query_graph/mod.rs
index b1dec48..f9d3f78 100644
--- a/src/query_graph/mod.rs
+++ b/src/query_graph/mod.rs
@@ -26,9 +26,6 @@ pub mod visitor;
 
 pub type NodeId = usize;
 
-#[derive(Clone, PartialEq, Eq, Copy, Hash, PartialOrd, Ord, Debug)]
-pub struct CorrelationId(pub usize);
-
 #[derive(Clone, PartialEq, Eq, Copy)]
 pub enum JoinType {
     Inner,
@@ -49,7 +46,6 @@ pub enum ApplyType {
 
 #[derive(Clone, Hash, PartialEq, Eq, PartialOrd, Ord, Debug)]
 pub struct CorrelationContext<E: VisitableExpr + RewritableExpr> {
-    pub correlation_id: CorrelationId,
     pub parameters: Vec<Rc<E>>,
 }
 
@@ -106,7 +102,6 @@ pub struct QueryGraph {
     parents: HashMap<NodeId, BTreeSet<NodeId>>,
     /// Subqueries
     subqueries: Vec<NodeId>,
-    next_correlation_id: CorrelationId,
     /// Keeps track of the number of node replacements the query graph has gone through.
     pub gen_number: usize,
     pub property_cache: RefCell<PropertyCache>,
@@ -233,7 +228,6 @@ impl QueryGraph {
             gen_number: 0,
             parents: HashMap::new(),
             subqueries: Vec::new(),
-            next_correlation_id: CorrelationId(0),
             property_cache: RefCell::new(PropertyCache::new()),
         }
     }
@@ -281,12 +275,6 @@ impl QueryGraph {
         self.subqueries.iter().map(|root_id| *root_id).collect_vec()
     }
 
-    pub fn new_correlation_id(&mut self) -> CorrelationId {
-        let result = self.next_correlation_id;
-        self.next_correlation_id = CorrelationId(result.0 + 1);
-        result
-    }
-
     /// Finds whether there is an existing node exactly like the given one.
     fn find_node(&self, node: &QueryNode) -> Option<NodeId> {
         self.nodes.iter().find_map(|(node_id, existing_node)| {
@@ -464,7 +452,6 @@ impl Clone for QueryGraph {
             gen_number: self.gen_number,
             parents: self.parents.clone(),
             subqueries: self.subqueries.clone(),
-            next_correlation_id: self.next_correlation_id,
             // Cached metadata is not cloned
             property_cache: RefCell::new(PropertyCache::new()),
         }
diff --git a/src/query_graph/properties/correlated_input_refs.rs b/src/query_graph/properties/correlated_input_refs.rs
index 5635fc3..686dd8b 100644
--- a/src/query_graph/properties/correlated_input_refs.rs
+++ b/src/query_graph/properties/correlated_input_refs.rs
@@ -7,9 +7,7 @@ use std::{
 use itertools::Itertools;
 
 use crate::{
-    query_graph::{
-        visitor::QueryGraphPrePostVisitor, CorrelationId, NodeId, QueryGraph, QueryNode,
-    },
+    query_graph::{visitor::QueryGraphPrePostVisitor, NodeId, QueryGraph, QueryNode},
     scalar_expr::{visitor::visit_expr_pre, ScalarExpr},
     visitor_utils::PreOrderVisitationResult,
 };
@@ -20,7 +18,7 @@ struct CorrelatedInputRefsTag;
 pub fn node_correlated_input_refs(
     query_graph: &QueryGraph,
     node_id: NodeId,
-) -> Rc<HashMap<CorrelationId, BTreeSet<usize>>> {
+) -> Rc<HashMap<usize, BTreeSet<usize>>> {
     let type_id = TypeId::of::<CorrelatedInputRefsTag>();
     if let Some(cached) = query_graph
         .property_cache
@@ -29,7 +27,7 @@ pub fn node_correlated_input_refs(
         .get(&type_id)
     {
         return cached
-            .downcast_ref::<Rc<HashMap<CorrelationId, BTreeSet<usize>>>>()
+            .downcast_ref::<Rc<HashMap<usize, BTreeSet<usize>>>>()
             .unwrap()
             .clone();
     }
@@ -39,12 +37,12 @@ pub fn node_correlated_input_refs(
         visit_expr_pre(expr, &mut |curr_expr| {
             match curr_expr.as_ref() {
                 ScalarExpr::CorrelatedInputRef {
-                    correlation_id,
+                    context_offset,
                     index,
                     ..
                 } => {
                     correlated_cols
-                        .entry(*correlation_id)
+                        .entry(*context_offset)
                         .or_insert_with(|| BTreeSet::new())
                         .insert(*index);
                 }
@@ -53,21 +51,23 @@ pub fn node_correlated_input_refs(
                 | ScalarExpr::ScalarSubqueryCmp { subquery, .. } => {
                     let subquery_correlated_input_refs =
                         subgraph_correlated_input_refs(query_graph, subquery.root);
-                    merge_correlated_maps(
-                        subquery_correlated_input_refs
-                            .iter()
-                            // Remove the references that correspond to parameters of the subquery
-                            .filter(|(correlation_id, _)| {
-                                subquery
-                                    .correlation
-                                    .as_ref()
-                                    .map(|correlation| {
-                                        correlation.correlation_id != **correlation_id
-                                    })
-                                    .unwrap_or(false)
-                            }),
-                        &mut correlated_cols,
-                    );
+                    if subquery.correlation.is_some() {
+                        let subquery_external_correlated_input_refs =
+                            subquery_correlated_input_refs
+                                .iter()
+                                .filter(|(offset, _)| **offset > 0)
+                                .map(|(offset, columns)| (offset - 1, columns.clone()))
+                                .collect::<HashMap<usize, BTreeSet<usize>>>();
+                        merge_correlated_maps(
+                            subquery_external_correlated_input_refs.iter(),
+                            &mut correlated_cols,
+                        );
+                    } else {
+                        merge_correlated_maps(
+                            subquery_correlated_input_refs.iter(),
+                            &mut correlated_cols,
+                        );
+                    }
                 }
                 _ => (),
             }
@@ -90,7 +90,7 @@ pub fn node_correlated_input_refs(
 pub fn subgraph_correlated_input_refs(
     query_graph: &QueryGraph,
     node_id: NodeId,
-) -> Rc<HashMap<CorrelationId, BTreeSet<usize>>> {
+) -> Rc<HashMap<usize, BTreeSet<usize>>> {
     SubgraphCorrelatedInputRefs::subgraph_correlated_input_refs(query_graph, node_id)
 }
 
@@ -102,10 +102,10 @@ pub fn subgraph_correlated_input_refs_annotator(
     let correlated_cols = correlated_cols
         .iter()
         .sorted()
-        .map(|(correlation_id, columns)| {
+        .map(|(offset, columns)| {
             columns
                 .iter()
-                .map(|column| format!("cor_{}.ref_{}", correlation_id.0, column))
+                .map(|column| format!("ctx_{}.ref_{}", *offset, column))
         })
         .flatten()
         .join(", ");
@@ -122,7 +122,7 @@ impl SubgraphCorrelatedInputRefs {
     fn subgraph_correlated_input_refs(
         query_graph: &QueryGraph,
         node_id: NodeId,
-    ) -> Rc<HashMap<CorrelationId, BTreeSet<usize>>> {
+    ) -> Rc<HashMap<usize, BTreeSet<usize>>> {
         let mut visitor = SubgraphCorrelatedInputRefs {};
         query_graph.visit_subgraph(&mut visitor, node_id);
         visitor.subgraph_correlated_input_refs_unchecked(query_graph, node_id)
@@ -132,14 +132,14 @@ impl SubgraphCorrelatedInputRefs {
         &self,
         query_graph: &QueryGraph,
         node_id: NodeId,
-    ) -> Rc<HashMap<CorrelationId, BTreeSet<usize>>> {
+    ) -> Rc<HashMap<usize, BTreeSet<usize>>> {
         query_graph
             .property_cache
             .borrow_mut()
             .node_bottom_up_properties(node_id)
             .get(&Self::metadata_type_id())
             .unwrap()
-            .downcast_ref::<Rc<HashMap<CorrelationId, BTreeSet<usize>>>>()
+            .downcast_ref::<Rc<HashMap<usize, BTreeSet<usize>>>>()
             .unwrap()
             .clone()
     }
@@ -152,9 +152,9 @@ impl SubgraphCorrelatedInputRefs {
         &self,
         query_graph: &QueryGraph,
         node_id: NodeId,
-    ) -> Rc<HashMap<CorrelationId, BTreeSet<usize>>> {
+    ) -> Rc<HashMap<usize, BTreeSet<usize>>> {
         // The correlated input refs in the node itself...
-        let mut correlated_cols: HashMap<CorrelationId, BTreeSet<usize>> =
+        let mut correlated_cols: HashMap<usize, BTreeSet<usize>> =
             node_correlated_input_refs(query_graph, node_id)
                 .as_ref()
                 .clone();
@@ -166,8 +166,12 @@ impl SubgraphCorrelatedInputRefs {
             merge_correlated_maps(input_correlated_cols.iter(), &mut correlated_cols);
         }
         //... but remove ones in the correlation scope the node defines.
-        if let QueryNode::Apply { correlation, .. } = &query_node {
-            correlated_cols.remove(&correlation.correlation_id);
+        if let QueryNode::Apply { .. } = &query_node {
+            correlated_cols = correlated_cols
+                .into_iter()
+                .filter(|(offset, _)| *offset > 0)
+                .map(|(offset, columns)| (offset - 1, columns))
+                .collect();
         }
         Rc::new(correlated_cols)
     }
@@ -204,12 +208,12 @@ impl QueryGraphPrePostVisitor for SubgraphCorrelatedInputRefs {
     }
 }
 
-fn merge_correlated_maps<'a, I>(src: I, dst: &mut HashMap<CorrelationId, BTreeSet<usize>>)
+fn merge_correlated_maps<'a, I>(src: I, dst: &mut HashMap<usize, BTreeSet<usize>>)
 where
-    I: Iterator<Item = (&'a CorrelationId, &'a BTreeSet<usize>)>,
+    I: Iterator<Item = (&'a usize, &'a BTreeSet<usize>)>,
 {
-    for (correlation_id, columns) in src {
-        dst.entry(*correlation_id)
+    for (context_offset, columns) in src {
+        dst.entry(*context_offset)
             .or_insert_with(|| BTreeSet::new())
             .extend(columns.iter());
     }
diff --git a/src/scalar_expr/mod.rs b/src/scalar_expr/mod.rs
index 970b5be..c4d3c10 100644
--- a/src/scalar_expr/mod.rs
+++ b/src/scalar_expr/mod.rs
@@ -7,7 +7,7 @@ use itertools::Itertools;
 
 use crate::{
     data_type::DataType,
-    query_graph::{CorrelationContext, CorrelationId, NodeId, QueryGraph},
+    query_graph::{CorrelationContext, NodeId, QueryGraph},
     value::{Literal, Value},
     visitor_utils::PostOrderVisitationResult,
 };
@@ -94,7 +94,9 @@ pub enum ScalarExpr {
         subquery: Subquery<ScalarExpr>,
     },
     CorrelatedInputRef {
-        correlation_id: CorrelationId,
+        /// The offset of the correlated context, with 0 being the closet one.
+        context_offset: usize,
+        /// The index of the parameter of the correlated context.
         index: usize,
         data_type: DataType,
     },
@@ -315,9 +317,8 @@ impl<E: VisitableExpr + RewritableExpr + fmt::Display> fmt::Display for Subquery
         if let Some(correlation) = self.correlation.as_ref() {
             write!(
                 f,
-                "correlated_subquery(node: {}, correlation_id: {}, parameters: [{}])",
+                "correlated_subquery(node: {}, parameters: [{}])",
                 self.root,
-                correlation.correlation_id.0,
                 correlation
                     .parameters
                     .iter()
@@ -357,10 +358,10 @@ impl fmt::Display for ScalarExpr {
                 subquery,
             } => write!(f, "{}({}, {})", op, scalar_operand, subquery),
             ScalarExpr::CorrelatedInputRef {
-                correlation_id,
+                context_offset,
                 index,
                 ..
-            } => write!(f, "cor_{}.ref_{}", correlation_id.0, index),
+            } => write!(f, "ctx_{}.ref_{}", context_offset, index),
         }
     }
 }
@@ -471,7 +472,7 @@ pub enum ExtendedScalarExpr {
         subquery: Subquery<ExtendedScalarExpr>,
     },
     CorrelatedInputRef {
-        correlation_id: CorrelationId,
+        context_offset: usize,
         index: usize,
         data_type: DataType,
     },
@@ -577,9 +578,8 @@ impl ToScalarExpr for Rc<ExtendedScalarExpr> {
                     ScalarExpr::ScalarSubquery {
                         subquery: Subquery {
                             root: subquery.root,
-                            correlation: subquery.correlation.as_ref().map(|correlation| {
+                            correlation: subquery.correlation.as_ref().map(|_| {
                                 CorrelationContext {
-                                    correlation_id: correlation.correlation_id,
                                     parameters: operands,
                                 }
                             }),
@@ -600,9 +600,8 @@ impl ToScalarExpr for Rc<ExtendedScalarExpr> {
                     ScalarExpr::ExistsSubquery {
                         subquery: Subquery {
                             root: subquery.root,
-                            correlation: subquery.correlation.as_ref().map(|correlation| {
+                            correlation: subquery.correlation.as_ref().map(|_| {
                                 CorrelationContext {
-                                    correlation_id: correlation.correlation_id,
                                     parameters: operands,
                                 }
                             }),
@@ -630,9 +629,8 @@ impl ToScalarExpr for Rc<ExtendedScalarExpr> {
                         scalar_operand,
                         subquery: Subquery {
                             root: subquery.root,
-                            correlation: subquery.correlation.as_ref().map(|correlation| {
+                            correlation: subquery.correlation.as_ref().map(|_| {
                                 CorrelationContext {
-                                    correlation_id: correlation.correlation_id,
                                     parameters: operands,
                                 }
                             }),
@@ -641,11 +639,11 @@ impl ToScalarExpr for Rc<ExtendedScalarExpr> {
                     expr
                 }
                 ExtendedScalarExpr::CorrelatedInputRef {
-                    correlation_id,
+                    context_offset,
                     index,
                     data_type,
                 } => ScalarExpr::CorrelatedInputRef {
-                    correlation_id: *correlation_id,
+                    context_offset: *context_offset,
                     index: *index,
                     data_type: data_type.clone(),
                 },
@@ -705,9 +703,8 @@ impl ToExtendedExpr for Rc<ScalarExpr> {
                     ExtendedScalarExpr::ScalarSubquery {
                         subquery: Subquery {
                             root: subquery.root,
-                            correlation: subquery.correlation.as_ref().map(|correlation| {
+                            correlation: subquery.correlation.as_ref().map(|_| {
                                 CorrelationContext {
-                                    correlation_id: correlation.correlation_id,
                                     parameters: operands,
                                 }
                             }),
@@ -728,9 +725,8 @@ impl ToExtendedExpr for Rc<ScalarExpr> {
                     ExtendedScalarExpr::ExistsSubquery {
                         subquery: Subquery {
                             root: subquery.root,
-                            correlation: subquery.correlation.as_ref().map(|correlation| {
+                            correlation: subquery.correlation.as_ref().map(|_| {
                                 CorrelationContext {
-                                    correlation_id: correlation.correlation_id,
                                     parameters: operands,
                                 }
                             }),
@@ -758,9 +754,8 @@ impl ToExtendedExpr for Rc<ScalarExpr> {
                         scalar_operand,
                         subquery: Subquery {
                             root: subquery.root,
-                            correlation: subquery.correlation.as_ref().map(|correlation| {
+                            correlation: subquery.correlation.as_ref().map(|_| {
                                 CorrelationContext {
-                                    correlation_id: correlation.correlation_id,
                                     parameters: operands,
                                 }
                             }),
@@ -769,11 +764,11 @@ impl ToExtendedExpr for Rc<ScalarExpr> {
                     expr
                 }
                 ScalarExpr::CorrelatedInputRef {
-                    correlation_id,
+                    context_offset,
                     index,
                     data_type,
                 } => ExtendedScalarExpr::CorrelatedInputRef {
-                    correlation_id: *correlation_id,
+                    context_offset: *context_offset,
                     index: *index,
                     data_type: data_type.clone(),
                 },
diff --git a/src/scalar_expr/rewrite.rs b/src/scalar_expr/rewrite.rs
index af26146..4ba42a2 100644
--- a/src/scalar_expr/rewrite.rs
+++ b/src/scalar_expr/rewrite.rs
@@ -427,22 +427,16 @@ impl RewritableExpr for ScalarExpr {
             ScalarExpr::ExistsSubquery { subquery } => ScalarExpr::ExistsSubquery {
                 subquery: Subquery {
                     root: subquery.root,
-                    correlation: subquery.correlation.as_ref().map(|correlation| {
-                        CorrelationContext {
-                            correlation_id: correlation.correlation_id,
-                            parameters: inputs.iter().cloned().collect_vec(),
-                        }
+                    correlation: subquery.correlation.as_ref().map(|_| CorrelationContext {
+                        parameters: inputs.iter().cloned().collect_vec(),
                     }),
                 },
             },
             ScalarExpr::ScalarSubquery { subquery } => ScalarExpr::ScalarSubquery {
                 subquery: Subquery {
                     root: subquery.root,
-                    correlation: subquery.correlation.as_ref().map(|correlation| {
-                        CorrelationContext {
-                            correlation_id: correlation.correlation_id,
-                            parameters: inputs.iter().cloned().collect_vec(),
-                        }
+                    correlation: subquery.correlation.as_ref().map(|_| CorrelationContext {
+                        parameters: inputs.iter().cloned().collect_vec(),
                     }),
                 },
             },
@@ -455,11 +449,8 @@ impl RewritableExpr for ScalarExpr {
                 scalar_operand: inputs[0].clone(),
                 subquery: Subquery {
                     root: subquery.root,
-                    correlation: subquery.correlation.as_ref().map(|correlation| {
-                        CorrelationContext {
-                            correlation_id: correlation.correlation_id,
-                            parameters: inputs.iter().skip(1).cloned().collect_vec(),
-                        }
+                    correlation: subquery.correlation.as_ref().map(|_| CorrelationContext {
+                        parameters: inputs.iter().skip(1).cloned().collect_vec(),
                     }),
                 },
             },
@@ -491,22 +482,16 @@ impl RewritableExpr for ExtendedScalarExpr {
             ExtendedScalarExpr::ExistsSubquery { subquery } => ExtendedScalarExpr::ExistsSubquery {
                 subquery: Subquery {
                     root: subquery.root,
-                    correlation: subquery.correlation.as_ref().map(|correlation| {
-                        CorrelationContext {
-                            correlation_id: correlation.correlation_id,
-                            parameters: inputs.iter().cloned().collect_vec(),
-                        }
+                    correlation: subquery.correlation.as_ref().map(|_| CorrelationContext {
+                        parameters: inputs.iter().cloned().collect_vec(),
                     }),
                 },
             },
             ExtendedScalarExpr::ScalarSubquery { subquery } => ExtendedScalarExpr::ScalarSubquery {
                 subquery: Subquery {
                     root: subquery.root,
-                    correlation: subquery.correlation.as_ref().map(|correlation| {
-                        CorrelationContext {
-                            correlation_id: correlation.correlation_id,
-                            parameters: inputs.iter().cloned().collect_vec(),
-                        }
+                    correlation: subquery.correlation.as_ref().map(|_| CorrelationContext {
+                        parameters: inputs.iter().cloned().collect_vec(),
                     }),
                 },
             },
@@ -519,11 +504,8 @@ impl RewritableExpr for ExtendedScalarExpr {
                 scalar_operand: inputs[0].clone(),
                 subquery: Subquery {
                     root: subquery.root,
-                    correlation: subquery.correlation.as_ref().map(|correlation| {
-                        CorrelationContext {
-                            correlation_id: correlation.correlation_id,
-                            parameters: inputs.iter().skip(1).cloned().collect_vec(),
-                        }
+                    correlation: subquery.correlation.as_ref().map(|_| CorrelationContext {
+                        parameters: inputs.iter().skip(1).cloned().collect_vec(),
                     }),
                 },
             },
diff --git a/tests/explain_test.rs b/tests/explain_test.rs
index 6ec40df..ae3d9eb 100644
--- a/tests/explain_test.rs
+++ b/tests/explain_test.rs
@@ -1677,14 +1677,13 @@ mod test_queries {
         queries.insert("left_apply_1".to_string(), {
             let mut query_graph = QueryGraph::new();
             let table_scan_1 = query_graph.table_scan(1, 5);
-            let correlation_id = query_graph.new_correlation_id();
             let filter_1 = query_graph.filter(
                 table_scan_1,
                 vec![ScalarExpr::input_ref(0)
                     .binary(
                         BinaryOp::Eq,
                         ScalarExpr::CorrelatedInputRef {
-                            correlation_id,
+                            context_offset: 0,
                             index: 0,
                             data_type: DataType::String,
                         }
@@ -1695,7 +1694,6 @@ mod test_queries {
             let table_scan_2 = query_graph.table_scan(2, 5);
             let apply_1 = query_graph.add_node(QueryNode::Apply {
                 correlation: CorrelationContext {
-                    correlation_id,
                     parameters: vec![ScalarExpr::input_ref(1).into()],
                 },
                 left: table_scan_2,
@@ -1721,8 +1719,6 @@ mod test_queries {
         queries.insert("nested_apply_1".to_string(), {
             let mut query_graph = QueryGraph::new();
             let table_scan_1 = query_graph.table_scan(1, 5);
-            let correlation_id_1 = query_graph.new_correlation_id();
-            let correlation_id_2 = query_graph.new_correlation_id();
             let filter_1 = query_graph.filter(
                 table_scan_1,
                 vec![
@@ -1730,7 +1726,7 @@ mod test_queries {
                         .binary(
                             BinaryOp::Eq,
                             ScalarExpr::CorrelatedInputRef {
-                                correlation_id: correlation_id_1,
+                                context_offset: 0,
                                 index: 0,
                                 data_type: DataType::String,
                             }
@@ -1741,7 +1737,7 @@ mod test_queries {
                         .binary(
                             BinaryOp::Eq,
                             ScalarExpr::CorrelatedInputRef {
-                                correlation_id: correlation_id_2,
+                                context_offset: 1,
                                 index: 0,
                                 data_type: DataType::String,
                             }
@@ -1753,7 +1749,6 @@ mod test_queries {
             let table_scan_2 = query_graph.table_scan(2, 5);
             let apply_1 = query_graph.add_node(QueryNode::Apply {
                 correlation: CorrelationContext {
-                    correlation_id: correlation_id_1,
                     parameters: vec![ScalarExpr::input_ref(1).into()],
                 },
                 left: table_scan_2,
@@ -1763,7 +1758,6 @@ mod test_queries {
             let table_scan_3 = query_graph.table_scan(3, 5);
             let apply_2 = query_graph.add_node(QueryNode::Apply {
                 correlation: CorrelationContext {
-                    correlation_id: correlation_id_2,
                     parameters: vec![ScalarExpr::input_ref(3).into()],
                 },
                 left: table_scan_3,
@@ -1792,14 +1786,13 @@ mod test_queries {
         queries.insert("correlated_filter_1".to_string(), {
             let mut query_graph = QueryGraph::new();
             let table_scan_1 = query_graph.table_scan(1, 5);
-            let correlation_id = query_graph.new_correlation_id();
             let filter_1 = query_graph.filter(
                 table_scan_1,
                 vec![ScalarExpr::input_ref(0)
                     .binary(
                         BinaryOp::Eq,
                         ScalarExpr::CorrelatedInputRef {
-                            correlation_id,
+                            context_offset: 0,
                             index: 0,
                             data_type: DataType::String,
                         }
@@ -1815,7 +1808,6 @@ mod test_queries {
                     subquery: Subquery {
                         root: subquery_root,
                         correlation: Some(CorrelationContext {
-                            correlation_id,
                             parameters: vec![ScalarExpr::input_ref(1).into()],
                         }),
                     },
@@ -1828,14 +1820,13 @@ mod test_queries {
         queries.insert("correlated_filter_2".to_string(), {
             let mut query_graph = QueryGraph::new();
             let table_scan_1 = query_graph.table_scan(1, 5);
-            let correlation_id = query_graph.new_correlation_id();
             let filter_1 = query_graph.filter(
                 table_scan_1,
                 vec![ScalarExpr::input_ref(0)
                     .binary(
                         BinaryOp::Eq,
                         ScalarExpr::CorrelatedInputRef {
-                            correlation_id,
+                            context_offset: 0,
                             index: 0,
                             data_type: DataType::String,
                         }
@@ -1851,7 +1842,6 @@ mod test_queries {
                     subquery: Subquery {
                         root: subquery_root,
                         correlation: Some(CorrelationContext {
-                            correlation_id: correlation_id,
                             parameters: vec![ScalarExpr::input_ref(1).into()],
                         }),
                     },
@@ -1859,14 +1849,13 @@ mod test_queries {
                 .into()],
             );
             let table_scan_3 = query_graph.table_scan(3, 5);
-            let correlation_id_2 = query_graph.new_correlation_id();
             let filter_3 = query_graph.filter(
                 table_scan_3,
                 vec![ScalarExpr::input_ref(0)
                     .binary(
                         BinaryOp::Eq,
                         ScalarExpr::CorrelatedInputRef {
-                            correlation_id: correlation_id_2,
+                            context_offset: 0,
                             index: 0,
                             data_type: DataType::String,
                         }
@@ -1881,7 +1870,6 @@ mod test_queries {
                     subquery: Subquery {
                         root: subquery_root_2,
                         correlation: Some(CorrelationContext {
-                            correlation_id: correlation_id_2,
                             parameters: vec![ScalarExpr::input_ref(1).into()],
                         }),
                     },
@@ -1894,14 +1882,13 @@ mod test_queries {
         queries.insert("correlated_filter_3".to_string(), {
             let mut query_graph = QueryGraph::new();
             let table_scan_1 = query_graph.table_scan(1, 5);
-            let correlation_id = query_graph.new_correlation_id();
             let filter_1 = query_graph.filter(
                 table_scan_1,
                 vec![ScalarExpr::input_ref(0)
                     .binary(
                         BinaryOp::Eq,
                         ScalarExpr::CorrelatedInputRef {
-                            correlation_id,
+                            context_offset: 0,
                             index: 0,
                             data_type: DataType::String,
                         }
@@ -1917,21 +1904,19 @@ mod test_queries {
                     subquery: Subquery {
                         root: subquery_root,
                         correlation: Some(CorrelationContext {
-                            correlation_id: correlation_id,
                             parameters: vec![ScalarExpr::input_ref(1).into()],
                         }),
                     },
                 }
                 .into()],
             );
-            let correlation_id_2 = query_graph.new_correlation_id();
             let filter_3 = query_graph.filter(
                 table_scan_1,
                 vec![ScalarExpr::input_ref(0)
                     .binary(
                         BinaryOp::Eq,
                         ScalarExpr::CorrelatedInputRef {
-                            correlation_id: correlation_id_2,
+                            context_offset: 0,
                             index: 0,
                             data_type: DataType::String,
                         }
@@ -1946,7 +1931,6 @@ mod test_queries {
                     subquery: Subquery {
                         root: subquery_root_2,
                         correlation: Some(CorrelationContext {
-                            correlation_id: correlation_id_2,
                             parameters: vec![ScalarExpr::input_ref(1).into()],
                         }),
                     },
@@ -1959,14 +1943,13 @@ mod test_queries {
         queries.insert("correlated_filter_pruning".to_string(), {
             let mut query_graph = QueryGraph::new();
             let table_scan_1 = query_graph.table_scan(1, 5);
-            let correlation_id = query_graph.new_correlation_id();
             let filter_1 = query_graph.filter(
                 table_scan_1,
                 vec![ScalarExpr::input_ref(0)
                     .binary(
                         BinaryOp::Eq,
                         ScalarExpr::CorrelatedInputRef {
-                            correlation_id,
+                            context_offset: 0,
                             index: 0,
                             data_type: DataType::String,
                         }
@@ -1985,7 +1968,6 @@ mod test_queries {
                     subquery: Subquery {
                         root: subquery_root,
                         correlation: Some(CorrelationContext {
-                            correlation_id: correlation_id,
                             parameters: vec![ScalarExpr::input_ref(1).into()],
                         }),
                     },
@@ -2002,14 +1984,13 @@ mod test_queries {
         queries.insert("correlated_project_1".to_string(), {
             let mut query_graph = QueryGraph::new();
             let table_scan_1 = query_graph.table_scan(1, 5);
-            let correlation_id = query_graph.new_correlation_id();
             let filter_1 = query_graph.filter(
                 table_scan_1,
                 vec![ScalarExpr::input_ref(0)
                     .binary(
                         BinaryOp::Eq,
                         ScalarExpr::CorrelatedInputRef {
-                            correlation_id,
+                            context_offset: 0,
                             index: 0,
                             data_type: DataType::String,
                         }
@@ -2025,7 +2006,6 @@ mod test_queries {
                     subquery: Subquery {
                         root: subquery_root,
                         correlation: Some(CorrelationContext {
-                            correlation_id,
                             parameters: vec![ScalarExpr::input_ref(1).into()],
                         }),
                     },
@@ -2038,14 +2018,13 @@ mod test_queries {
         queries.insert("correlated_project_pruning".to_string(), {
             let mut query_graph = QueryGraph::new();
             let table_scan_1 = query_graph.table_scan(1, 5);
-            let correlation_id = query_graph.new_correlation_id();
             let filter_1 = query_graph.filter(
                 table_scan_1,
                 vec![ScalarExpr::input_ref(0)
                     .binary(
                         BinaryOp::Eq,
                         ScalarExpr::CorrelatedInputRef {
-                            correlation_id,
+                            context_offset: 0,
                             index: 0,
                             data_type: DataType::String,
                         }
@@ -2064,7 +2043,6 @@ mod test_queries {
                     subquery: Subquery {
                         root: subquery_root,
                         correlation: Some(CorrelationContext {
-                            correlation_id,
                             parameters: vec![ScalarExpr::input_ref(1).into()],
                         }),
                     },
diff --git a/tests/testdata/explain/apply.test b/tests/testdata/explain/apply.test
index 69c6ab0..0a29397 100644
--- a/tests/testdata/explain/apply.test
+++ b/tests/testdata/explain/apply.test
@@ -2,17 +2,17 @@ run
 left_apply_1
 ----
 ----
-[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]
+[3] Left Outer Apply parameters: [ref_1]
     - Num Columns: 10
     - Row Type: string, string, string, string, string, string, string, string, string, string
   [2] TableScan id: 2
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -22,24 +22,24 @@ Optimized:
 [4] Project [ref_0, ref_1, ref_2, ref_3, ref_4, ref_5, ref_6, ref_7, ref_8, ref_9]
     - Num Columns: 10
     - Row Type: string, string, string, string, string, string, string, string, string, string
-  [3] Left Outer Apply correlation_id: 0, parameters: [ref_1]
+  [3] Left Outer Apply parameters: [ref_1]
       - Num Columns: 10
       - Row Type: string, string, string, string, string, string, string, string, string, string
     [2] TableScan id: 2
         - Num Columns: 5
         - Row Type: string, string, string, string, string
-    [1] Filter [eq(ref_0, cor_0.ref_0)]
+    [1] Filter [eq(ref_0, ctx_0.ref_0)]
         - Num Columns: 5
         - Row Type: string, string, string, string, string
-        - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-        - Correlated References: cor_0.ref_0
+        - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+        - Correlated References: ctx_0.ref_0
       [0] TableScan id: 1
           - Num Columns: 5
           - Row Type: string, string, string, string, string
 
-initial {"nodes":[{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
-step TopProjectionRule {"nodes":[{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"4","label":"[4] Project [ref_0, ref_1, ref_2, ref_3, ref_4, ref_5, ref_6, ref_7, ref_8, ref_9]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]}],"edges":[{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"4","to":"3","label":"input 0"},{"from":"3","to":"4","label":"TopProjectionRule"}]}
-final {"nodes":[{"id":"4","label":"[4] Project [ref_0, ref_1, ref_2, ref_3, ref_4, ref_5, ref_6, ref_7, ref_8, ref_9]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
+initial {"nodes":[{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
+step TopProjectionRule {"nodes":[{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"4","label":"[4] Project [ref_0, ref_1, ref_2, ref_3, ref_4, ref_5, ref_6, ref_7, ref_8, ref_9]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]}],"edges":[{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"4","to":"3","label":"input 0"},{"from":"3","to":"4","label":"TopProjectionRule"}]}
+final {"nodes":[{"id":"4","label":"[4] Project [ref_0, ref_1, ref_2, ref_3, ref_4, ref_5, ref_6, ref_7, ref_8, ref_9]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
 ----
 ----
 
@@ -47,24 +47,24 @@ run
 nested_apply_1
 ----
 ----
-[5] Inner Apply correlation_id: 1, parameters: [ref_3]
+[5] Inner Apply parameters: [ref_3]
     - Num Columns: 15
     - Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string
   [4] TableScan id: 3
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-  [3] Left Outer Apply correlation_id: 0, parameters: [ref_1]
+  [3] Left Outer Apply parameters: [ref_1]
       - Num Columns: 10
       - Row Type: string, string, string, string, string, string, string, string, string, string
-      - Correlated References: cor_1.ref_0
+      - Correlated References: ctx_0.ref_0
     [2] TableScan id: 2
         - Num Columns: 5
         - Row Type: string, string, string, string, string
-    [1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]
+    [1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]
         - Num Columns: 5
         - Row Type: string, string, string, string, string
-        - Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)
-        - Correlated References: cor_0.ref_0, cor_1.ref_0
+        - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)
+        - Correlated References: ctx_0.ref_0, ctx_1.ref_0
       [0] TableScan id: 1
           - Num Columns: 5
           - Row Type: string, string, string, string, string
@@ -74,31 +74,31 @@ Optimized:
 [6] Project [ref_0, ref_1, ref_2, ref_3, ref_4, ref_5, ref_6, ref_7, ref_8, ref_9, ref_10, ref_11, ref_12, ref_13, ref_14]
     - Num Columns: 15
     - Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string
-  [5] Inner Apply correlation_id: 1, parameters: [ref_3]
+  [5] Inner Apply parameters: [ref_3]
       - Num Columns: 15
       - Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string
     [4] TableScan id: 3
         - Num Columns: 5
         - Row Type: string, string, string, string, string
-    [3] Left Outer Apply correlation_id: 0, parameters: [ref_1]
+    [3] Left Outer Apply parameters: [ref_1]
         - Num Columns: 10
         - Row Type: string, string, string, string, string, string, string, string, string, string
-        - Correlated References: cor_1.ref_0
+        - Correlated References: ctx_0.ref_0
       [2] TableScan id: 2
           - Num Columns: 5
           - Row Type: string, string, string, string, string
-      [1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]
+      [1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]
           - Num Columns: 5
           - Row Type: string, string, string, string, string
-          - Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)
-          - Correlated References: cor_0.ref_0, cor_1.ref_0
+          - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)
+          - Correlated References: ctx_0.ref_0, ctx_1.ref_0
         [0] TableScan id: 1
             - Num Columns: 5
             - Row Type: string, string, string, string, string
 
-initial {"nodes":[{"id":"5","label":"[5] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: cor_1.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)","Correlated References: cor_0.ref_0, cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"3","label":"input 1"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
-step TopProjectionRule {"nodes":[{"id":"5","label":"[5] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: cor_1.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)","Correlated References: cor_0.ref_0, cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] Project [ref_0, ref_1, ref_2, ref_3, ref_4, ref_5, ref_6, ref_7, ref_8, ref_9, ref_10, ref_11, ref_12, ref_13, ref_14]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"3","label":"input 1"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"6","label":"TopProjectionRule"}]}
-final {"nodes":[{"id":"6","label":"[6] Project [ref_0, ref_1, ref_2, ref_3, ref_4, ref_5, ref_6, ref_7, ref_8, ref_9, ref_10, ref_11, ref_12, ref_13, ref_14]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"5","label":"[5] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: cor_1.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)","Correlated References: cor_0.ref_0, cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"3","label":"input 1"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
+initial {"nodes":[{"id":"5","label":"[5] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: ctx_0.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)","Correlated References: ctx_0.ref_0, ctx_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"3","label":"input 1"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
+step TopProjectionRule {"nodes":[{"id":"5","label":"[5] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: ctx_0.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)","Correlated References: ctx_0.ref_0, ctx_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] Project [ref_0, ref_1, ref_2, ref_3, ref_4, ref_5, ref_6, ref_7, ref_8, ref_9, ref_10, ref_11, ref_12, ref_13, ref_14]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"3","label":"input 1"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"6","label":"TopProjectionRule"}]}
+final {"nodes":[{"id":"6","label":"[6] Project [ref_0, ref_1, ref_2, ref_3, ref_4, ref_5, ref_6, ref_7, ref_8, ref_9, ref_10, ref_11, ref_12, ref_13, ref_14]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"5","label":"[5] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: ctx_0.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)","Correlated References: ctx_0.ref_0, ctx_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"3","label":"input 1"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
 ----
 ----
 
@@ -109,17 +109,17 @@ left_apply_2
 [4] Project [ref_4, ref_6, ref_7]
     - Num Columns: 3
     - Row Type: string, string, string
-  [3] Left Outer Apply correlation_id: 0, parameters: [ref_1]
+  [3] Left Outer Apply parameters: [ref_1]
       - Num Columns: 10
       - Row Type: string, string, string, string, string, string, string, string, string, string
     [2] TableScan id: 2
         - Num Columns: 5
         - Row Type: string, string, string, string, string
-    [1] Filter [eq(ref_0, cor_0.ref_0)]
+    [1] Filter [eq(ref_0, ctx_0.ref_0)]
         - Num Columns: 5
         - Row Type: string, string, string, string, string
-        - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-        - Correlated References: cor_0.ref_0
+        - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+        - Correlated References: ctx_0.ref_0
       [0] TableScan id: 1
           - Num Columns: 5
           - Row Type: string, string, string, string, string
@@ -129,7 +129,7 @@ Optimized:
 [12] Project [ref_0, ref_1, ref_2]
     - Num Columns: 3
     - Row Type: string, string, string
-  [11] Left Outer Apply correlation_id: 0, parameters: [ref_1]
+  [11] Left Outer Apply parameters: [ref_1]
       - Num Columns: 3
       - Row Type: string, string, string
     [13] Project [ref_4]
@@ -141,22 +141,22 @@ Optimized:
     [6] Project [ref_1, ref_2]
         - Num Columns: 2
         - Row Type: string, string
-        - Correlated References: cor_0.ref_0
-      [1] Filter [eq(ref_0, cor_0.ref_0)]
+        - Correlated References: ctx_0.ref_0
+      [1] Filter [eq(ref_0, ctx_0.ref_0)]
           - Num Columns: 5
           - Row Type: string, string, string, string, string
-          - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-          - Correlated References: cor_0.ref_0
+          - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+          - Correlated References: ctx_0.ref_0
         [0] TableScan id: 1
             - Num Columns: 5
             - Row Type: string, string, string, string, string
 
-initial {"nodes":[{"id":"4","label":"[4] Project [ref_4, ref_6, ref_7]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
-step ApplyPruningRule {"nodes":[{"id":"4","label":"[4] Project [ref_4, ref_6, ref_7]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"8","label":"[8] Project [ref_1, ref_2, ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"7","label":"[7] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 4","Row Type: string, string, string, string"]},{"id":"5","label":"[5] Project [ref_1, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"6","label":"[6] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_0.ref_0"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"8","to":"7","label":"input 0"},{"from":"7","to":"5","label":"input 0"},{"from":"7","to":"6","label":"input 1"},{"from":"5","to":"2","label":"input 0"},{"from":"6","to":"1","label":"input 0"},{"from":"4","to":"8","label":"ApplyPruningRule"}]}
-step ApplyPruningRule {"nodes":[{"id":"8","label":"[8] Project [ref_1, ref_2, ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"7","label":"[7] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 4","Row Type: string, string, string, string"]},{"id":"5","label":"[5] Project [ref_1, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"12","label":"[12] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"9","label":"[9] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"10","label":"[10] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_0.ref_0"]}],"edges":[{"from":"8","to":"7","label":"input 0"},{"from":"7","to":"5","label":"input 0"},{"from":"7","to":"6","label":"input 1"},{"from":"5","to":"2","label":"input 0"},{"from":"6","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"12","to":"11","label":"input 0"},{"from":"11","to":"9","label":"input 0"},{"from":"11","to":"10","label":"input 1"},{"from":"9","to":"5","label":"input 0"},{"from":"10","to":"6","label":"input 0"},{"from":"8","to":"12","label":"ApplyPruningRule"}]}
-step ProjectMergeRule {"nodes":[{"id":"12","label":"[12] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"9","label":"[9] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"5","label":"[5] Project [ref_1, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"10","label":"[10] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_0.ref_0"]},{"id":"6","label":"[6] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"13","label":"[13] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]}],"edges":[{"from":"12","to":"11","label":"input 0"},{"from":"11","to":"9","label":"input 0"},{"from":"11","to":"10","label":"input 1"},{"from":"9","to":"5","label":"input 0"},{"from":"5","to":"2","label":"input 0"},{"from":"10","to":"6","label":"input 0"},{"from":"6","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"13","to":"2","label":"input 0"},{"from":"9","to":"13","label":"ProjectMergeRule"}]}
-step ProjectMergeRule {"nodes":[{"id":"12","label":"[12] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"10","label":"[10] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_0.ref_0"]},{"id":"6","label":"[6] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"12","to":"11","label":"input 0"},{"from":"11","to":"13","label":"input 0"},{"from":"11","to":"10","label":"input 1"},{"from":"13","to":"2","label":"input 0"},{"from":"10","to":"6","label":"input 0"},{"from":"6","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"10","to":"6","label":"ProjectMergeRule"}]}
-final {"nodes":[{"id":"12","label":"[12] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"12","to":"11","label":"input 0"},{"from":"11","to":"13","label":"input 0"},{"from":"11","to":"6","label":"input 1"},{"from":"13","to":"2","label":"input 0"},{"from":"6","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+initial {"nodes":[{"id":"4","label":"[4] Project [ref_4, ref_6, ref_7]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
+step ApplyPruningRule {"nodes":[{"id":"4","label":"[4] Project [ref_4, ref_6, ref_7]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"8","label":"[8] Project [ref_1, ref_2, ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"7","label":"[7] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 4","Row Type: string, string, string, string"]},{"id":"5","label":"[5] Project [ref_1, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"6","label":"[6] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"8","to":"7","label":"input 0"},{"from":"7","to":"5","label":"input 0"},{"from":"7","to":"6","label":"input 1"},{"from":"5","to":"2","label":"input 0"},{"from":"6","to":"1","label":"input 0"},{"from":"4","to":"8","label":"ApplyPruningRule"}]}
+step ApplyPruningRule {"nodes":[{"id":"8","label":"[8] Project [ref_1, ref_2, ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"7","label":"[7] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 4","Row Type: string, string, string, string"]},{"id":"5","label":"[5] Project [ref_1, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"12","label":"[12] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"9","label":"[9] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"10","label":"[10] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]}],"edges":[{"from":"8","to":"7","label":"input 0"},{"from":"7","to":"5","label":"input 0"},{"from":"7","to":"6","label":"input 1"},{"from":"5","to":"2","label":"input 0"},{"from":"6","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"12","to":"11","label":"input 0"},{"from":"11","to":"9","label":"input 0"},{"from":"11","to":"10","label":"input 1"},{"from":"9","to":"5","label":"input 0"},{"from":"10","to":"6","label":"input 0"},{"from":"8","to":"12","label":"ApplyPruningRule"}]}
+step ProjectMergeRule {"nodes":[{"id":"12","label":"[12] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"9","label":"[9] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"5","label":"[5] Project [ref_1, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"10","label":"[10] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"6","label":"[6] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"13","label":"[13] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]}],"edges":[{"from":"12","to":"11","label":"input 0"},{"from":"11","to":"9","label":"input 0"},{"from":"11","to":"10","label":"input 1"},{"from":"9","to":"5","label":"input 0"},{"from":"5","to":"2","label":"input 0"},{"from":"10","to":"6","label":"input 0"},{"from":"6","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"13","to":"2","label":"input 0"},{"from":"9","to":"13","label":"ProjectMergeRule"}]}
+step ProjectMergeRule {"nodes":[{"id":"12","label":"[12] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"10","label":"[10] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"6","label":"[6] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"12","to":"11","label":"input 0"},{"from":"11","to":"13","label":"input 0"},{"from":"11","to":"10","label":"input 1"},{"from":"13","to":"2","label":"input 0"},{"from":"10","to":"6","label":"input 0"},{"from":"6","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"10","to":"6","label":"ProjectMergeRule"}]}
+final {"nodes":[{"id":"12","label":"[12] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"12","to":"11","label":"input 0"},{"from":"11","to":"13","label":"input 0"},{"from":"11","to":"6","label":"input 1"},{"from":"13","to":"2","label":"input 0"},{"from":"6","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
 ----
 ----
 
@@ -167,24 +167,24 @@ nested_apply_2
 [6] Project [ref_4, ref_6, ref_7]
     - Num Columns: 3
     - Row Type: string, string, string
-  [5] Inner Apply correlation_id: 1, parameters: [ref_3]
+  [5] Inner Apply parameters: [ref_3]
       - Num Columns: 15
       - Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string
     [4] TableScan id: 3
         - Num Columns: 5
         - Row Type: string, string, string, string, string
-    [3] Left Outer Apply correlation_id: 0, parameters: [ref_1]
+    [3] Left Outer Apply parameters: [ref_1]
         - Num Columns: 10
         - Row Type: string, string, string, string, string, string, string, string, string, string
-        - Correlated References: cor_1.ref_0
+        - Correlated References: ctx_0.ref_0
       [2] TableScan id: 2
           - Num Columns: 5
           - Row Type: string, string, string, string, string
-      [1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]
+      [1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]
           - Num Columns: 5
           - Row Type: string, string, string, string, string
-          - Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)
-          - Correlated References: cor_0.ref_0, cor_1.ref_0
+          - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)
+          - Correlated References: ctx_0.ref_0, ctx_1.ref_0
         [0] TableScan id: 1
             - Num Columns: 5
             - Row Type: string, string, string, string, string
@@ -194,7 +194,7 @@ Optimized:
 [14] Project [ref_0, ref_1, ref_2]
     - Num Columns: 3
     - Row Type: string, string, string
-  [13] Inner Apply correlation_id: 1, parameters: [ref_3]
+  [13] Inner Apply parameters: [ref_3]
       - Num Columns: 3
       - Row Type: string, string, string
     [15] Project [ref_4]
@@ -206,28 +206,28 @@ Optimized:
     [8] Project [ref_1, ref_2]
         - Num Columns: 2
         - Row Type: string, string
-        - Correlated References: cor_1.ref_0
-      [3] Left Outer Apply correlation_id: 0, parameters: [ref_1]
+        - Correlated References: ctx_0.ref_0
+      [3] Left Outer Apply parameters: [ref_1]
           - Num Columns: 10
           - Row Type: string, string, string, string, string, string, string, string, string, string
-          - Correlated References: cor_1.ref_0
+          - Correlated References: ctx_0.ref_0
         [2] TableScan id: 2
             - Num Columns: 5
             - Row Type: string, string, string, string, string
-        [1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]
+        [1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]
             - Num Columns: 5
             - Row Type: string, string, string, string, string
-            - Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)
-            - Correlated References: cor_0.ref_0, cor_1.ref_0
+            - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)
+            - Correlated References: ctx_0.ref_0, ctx_1.ref_0
           [0] TableScan id: 1
               - Num Columns: 5
               - Row Type: string, string, string, string, string
 
-initial {"nodes":[{"id":"6","label":"[6] Project [ref_4, ref_6, ref_7]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"5","label":"[5] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: cor_1.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)","Correlated References: cor_0.ref_0, cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"3","label":"input 1"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
-step ApplyPruningRule {"nodes":[{"id":"6","label":"[6] Project [ref_4, ref_6, ref_7]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"5","label":"[5] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: cor_1.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)","Correlated References: cor_0.ref_0, cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"10","label":"[10] Project [ref_1, ref_2, ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"9","label":"[9] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 4","Row Type: string, string, string, string"]},{"id":"7","label":"[7] Project [ref_3, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"8","label":"[8] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_1.ref_0"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"3","label":"input 1"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"10","to":"9","label":"input 0"},{"from":"9","to":"7","label":"input 0"},{"from":"9","to":"8","label":"input 1"},{"from":"7","to":"4","label":"input 0"},{"from":"8","to":"3","label":"input 0"},{"from":"6","to":"10","label":"ApplyPruningRule"}]}
-step ApplyPruningRule {"nodes":[{"id":"10","label":"[10] Project [ref_1, ref_2, ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"9","label":"[9] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 4","Row Type: string, string, string, string"]},{"id":"7","label":"[7] Project [ref_3, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"8","label":"[8] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_1.ref_0"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: cor_1.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)","Correlated References: cor_0.ref_0, cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"14","label":"[14] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"12","label":"[12] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_1.ref_0"]}],"edges":[{"from":"10","to":"9","label":"input 0"},{"from":"9","to":"7","label":"input 0"},{"from":"9","to":"8","label":"input 1"},{"from":"7","to":"4","label":"input 0"},{"from":"8","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"14","to":"13","label":"input 0"},{"from":"13","to":"11","label":"input 0"},{"from":"13","to":"12","label":"input 1"},{"from":"11","to":"7","label":"input 0"},{"from":"12","to":"8","label":"input 0"},{"from":"10","to":"14","label":"ApplyPruningRule"}]}
-step ProjectMergeRule {"nodes":[{"id":"14","label":"[14] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"7","label":"[7] Project [ref_3, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"12","label":"[12] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_1.ref_0"]},{"id":"8","label":"[8] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_1.ref_0"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: cor_1.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)","Correlated References: cor_0.ref_0, cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"15","label":"[15] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]}],"edges":[{"from":"14","to":"13","label":"input 0"},{"from":"13","to":"11","label":"input 0"},{"from":"13","to":"12","label":"input 1"},{"from":"11","to":"7","label":"input 0"},{"from":"7","to":"4","label":"input 0"},{"from":"12","to":"8","label":"input 0"},{"from":"8","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"15","to":"4","label":"input 0"},{"from":"11","to":"15","label":"ProjectMergeRule"}]}
-step ProjectMergeRule {"nodes":[{"id":"14","label":"[14] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"15","label":"[15] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"12","label":"[12] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_1.ref_0"]},{"id":"8","label":"[8] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_1.ref_0"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: cor_1.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)","Correlated References: cor_0.ref_0, cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"14","to":"13","label":"input 0"},{"from":"13","to":"15","label":"input 0"},{"from":"13","to":"12","label":"input 1"},{"from":"15","to":"4","label":"input 0"},{"from":"12","to":"8","label":"input 0"},{"from":"8","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"12","to":"8","label":"ProjectMergeRule"}]}
-final {"nodes":[{"id":"14","label":"[14] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Inner Apply correlation_id: 1, parameters: [ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"15","label":"[15] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"8","label":"[8] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: cor_1.ref_0"]},{"id":"3","label":"[3] Left Outer Apply correlation_id: 0, parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: cor_1.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0), eq(ref_1, cor_1.ref_0)","Correlated References: cor_0.ref_0, cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"14","to":"13","label":"input 0"},{"from":"13","to":"15","label":"input 0"},{"from":"13","to":"8","label":"input 1"},{"from":"15","to":"4","label":"input 0"},{"from":"8","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
+initial {"nodes":[{"id":"6","label":"[6] Project [ref_4, ref_6, ref_7]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"5","label":"[5] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: ctx_0.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)","Correlated References: ctx_0.ref_0, ctx_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"3","label":"input 1"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
+step ApplyPruningRule {"nodes":[{"id":"6","label":"[6] Project [ref_4, ref_6, ref_7]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"5","label":"[5] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 15","Row Type: string, string, string, string, string, string, string, string, string, string, string, string, string, string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: ctx_0.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)","Correlated References: ctx_0.ref_0, ctx_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"10","label":"[10] Project [ref_1, ref_2, ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"9","label":"[9] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 4","Row Type: string, string, string, string"]},{"id":"7","label":"[7] Project [ref_3, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"8","label":"[8] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"3","label":"input 1"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"10","to":"9","label":"input 0"},{"from":"9","to":"7","label":"input 0"},{"from":"9","to":"8","label":"input 1"},{"from":"7","to":"4","label":"input 0"},{"from":"8","to":"3","label":"input 0"},{"from":"6","to":"10","label":"ApplyPruningRule"}]}
+step ApplyPruningRule {"nodes":[{"id":"10","label":"[10] Project [ref_1, ref_2, ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"9","label":"[9] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 4","Row Type: string, string, string, string"]},{"id":"7","label":"[7] Project [ref_3, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"8","label":"[8] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: ctx_0.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)","Correlated References: ctx_0.ref_0, ctx_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"14","label":"[14] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"12","label":"[12] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]}],"edges":[{"from":"10","to":"9","label":"input 0"},{"from":"9","to":"7","label":"input 0"},{"from":"9","to":"8","label":"input 1"},{"from":"7","to":"4","label":"input 0"},{"from":"8","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"14","to":"13","label":"input 0"},{"from":"13","to":"11","label":"input 0"},{"from":"13","to":"12","label":"input 1"},{"from":"11","to":"7","label":"input 0"},{"from":"12","to":"8","label":"input 0"},{"from":"10","to":"14","label":"ApplyPruningRule"}]}
+step ProjectMergeRule {"nodes":[{"id":"14","label":"[14] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"11","label":"[11] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"7","label":"[7] Project [ref_3, ref_4]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"12","label":"[12] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"8","label":"[8] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: ctx_0.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)","Correlated References: ctx_0.ref_0, ctx_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"15","label":"[15] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]}],"edges":[{"from":"14","to":"13","label":"input 0"},{"from":"13","to":"11","label":"input 0"},{"from":"13","to":"12","label":"input 1"},{"from":"11","to":"7","label":"input 0"},{"from":"7","to":"4","label":"input 0"},{"from":"12","to":"8","label":"input 0"},{"from":"8","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"15","to":"4","label":"input 0"},{"from":"11","to":"15","label":"ProjectMergeRule"}]}
+step ProjectMergeRule {"nodes":[{"id":"14","label":"[14] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"15","label":"[15] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"12","label":"[12] Project [ref_0, ref_1]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"8","label":"[8] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: ctx_0.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)","Correlated References: ctx_0.ref_0, ctx_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"14","to":"13","label":"input 0"},{"from":"13","to":"15","label":"input 0"},{"from":"13","to":"12","label":"input 1"},{"from":"15","to":"4","label":"input 0"},{"from":"12","to":"8","label":"input 0"},{"from":"8","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"},{"from":"12","to":"8","label":"ProjectMergeRule"}]}
+final {"nodes":[{"id":"14","label":"[14] Project [ref_0, ref_1, ref_2]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"13","label":"[13] Inner Apply parameters: [ref_3]","annotations":["Num Columns: 3","Row Type: string, string, string"]},{"id":"15","label":"[15] Project [ref_4]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"4","label":"[4] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"8","label":"[8] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string","Correlated References: ctx_0.ref_0"]},{"id":"3","label":"[3] Left Outer Apply parameters: [ref_1]","annotations":["Num Columns: 10","Row Type: string, string, string, string, string, string, string, string, string, string","Correlated References: ctx_0.ref_0"]},{"id":"2","label":"[2] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0), eq(ref_1, ctx_1.ref_0)","Correlated References: ctx_0.ref_0, ctx_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"14","to":"13","label":"input 0"},{"from":"13","to":"15","label":"input 0"},{"from":"13","to":"8","label":"input 1"},{"from":"15","to":"4","label":"input 0"},{"from":"8","to":"3","label":"input 0"},{"from":"3","to":"2","label":"input 0"},{"from":"3","to":"1","label":"input 1"},{"from":"1","to":"0","label":"input 0"}]}
 ----
 ----
diff --git a/tests/testdata/explain/correlated_filter.test b/tests/testdata/explain/correlated_filter.test
index 4eff719..c33c9d3 100644
--- a/tests/testdata/explain/correlated_filter.test
+++ b/tests/testdata/explain/correlated_filter.test
@@ -2,10 +2,10 @@ run
 correlated_filter_1
 ----
 ----
-[4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]
+[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))
+    - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))
   [3] TableScan id: 2
       - Num Columns: 5
       - Row Type: string, string, string, string, string
@@ -13,13 +13,13 @@ correlated_filter_1
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -29,11 +29,11 @@ Optimized:
 [5] Project [ref_0, ref_1, ref_2, ref_3, ref_4]
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))
-  [4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]
+    - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))
+  [4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))
+      - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))
     [3] TableScan id: 2
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -41,20 +41,20 @@ Optimized:
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
 
-initial {"nodes":[{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
-step TopProjectionRule {"nodes":[{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"5","label":"[5] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"4","to":"5","label":"TopProjectionRule"}]}
-final {"nodes":[{"id":"5","label":"[5] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+initial {"nodes":[{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+step TopProjectionRule {"nodes":[{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"5","label":"[5] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"4","to":"5","label":"TopProjectionRule"}]}
+final {"nodes":[{"id":"5","label":"[5] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
 ----
 ----
 
@@ -62,14 +62,14 @@ run
 correlated_filter_2
 ----
 ----
-[8] Filter [exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))]
+[8] Filter [exists(correlated_subquery(node: 7, parameters: [ref_1]))]
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))
-  [4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]
+    - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))
+  [4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))
+      - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))
     [3] TableScan id: 2
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -77,13 +77,13 @@ correlated_filter_2
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -91,13 +91,13 @@ correlated_filter_2
 [7] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_1.ref_0)
-    - Correlated References: cor_1.ref_0
-  [6] Filter [eq(ref_0, cor_1.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [6] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_1.ref_0)
-      - Correlated References: cor_1.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [5] TableScan id: 3
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -107,11 +107,11 @@ Optimized:
 [9] Project [ref_0, ref_1, ref_2, ref_3, ref_4]
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))
-  [11] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))]
+    - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))
+  [11] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))
+      - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))
     [3] TableScan id: 2
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -119,13 +119,13 @@ Optimized:
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -133,22 +133,22 @@ Optimized:
 [7] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_1.ref_0)
-    - Correlated References: cor_1.ref_0
-  [6] Filter [eq(ref_0, cor_1.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [6] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_1.ref_0)
-      - Correlated References: cor_1.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [5] TableScan id: 3
         - Num Columns: 5
         - Row Type: string, string, string, string, string
 
-initial {"nodes":[{"id":"8","label":"[8] Filter [exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"6","label":"[6] Filter [eq(ref_0, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"5","label":"[5] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"8","to":"4","label":"input 0"},{"from":"8","to":"7","label":"subquery(7)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"7","to":"6","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
-step TopProjectionRule {"nodes":[{"id":"8","label":"[8] Filter [exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"6","label":"[6] Filter [eq(ref_0, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"5","label":"[5] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"9","label":"[9] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]}],"edges":[{"from":"8","to":"4","label":"input 0"},{"from":"8","to":"7","label":"subquery(7)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"7","to":"6","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"9","to":"8","label":"input 0"},{"from":"8","to":"9","label":"TopProjectionRule"}]}
-step FilterMergeRule {"nodes":[{"id":"9","label":"[9] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]},{"id":"8","label":"[8] Filter [exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"6","label":"[6] Filter [eq(ref_0, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"5","label":"[5] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"10","label":"[10] Filter [exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1])), exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]}],"edges":[{"from":"9","to":"8","label":"input 0"},{"from":"8","to":"4","label":"input 0"},{"from":"8","to":"7","label":"subquery(7)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"7","to":"6","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"10","to":"3","label":"input 0"},{"from":"10","to":"2","label":"subquery(2)"},{"from":"10","to":"7","label":"subquery(7)"},{"from":"8","to":"10","label":"FilterMergeRule"}]}
-step FilterNormalizationRule {"nodes":[{"id":"9","label":"[9] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]},{"id":"10","label":"[10] Filter [exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1])), exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"6","label":"[6] Filter [eq(ref_0, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"5","label":"[5] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"11","label":"[11] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]}],"edges":[{"from":"9","to":"10","label":"input 0"},{"from":"10","to":"3","label":"input 0"},{"from":"10","to":"2","label":"subquery(2)"},{"from":"10","to":"7","label":"subquery(7)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"7","to":"6","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"11","to":"3","label":"input 0"},{"from":"11","to":"2","label":"subquery(2)"},{"from":"11","to":"7","label":"subquery(7)"},{"from":"10","to":"11","label":"FilterNormalizationRule"}]}
-final {"nodes":[{"id":"9","label":"[9] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]},{"id":"11","label":"[11] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 7, correlation_id: 1, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"6","label":"[6] Filter [eq(ref_0, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"5","label":"[5] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"9","to":"11","label":"input 0"},{"from":"11","to":"3","label":"input 0"},{"from":"11","to":"2","label":"subquery(2)"},{"from":"11","to":"7","label":"subquery(7)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"7","to":"6","label":"input 0"},{"from":"6","to":"5","label":"input 0"}]}
+initial {"nodes":[{"id":"8","label":"[8] Filter [exists(correlated_subquery(node: 7, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"6","label":"[6] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"5","label":"[5] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"8","to":"4","label":"input 0"},{"from":"8","to":"7","label":"subquery(7)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"7","to":"6","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+step TopProjectionRule {"nodes":[{"id":"8","label":"[8] Filter [exists(correlated_subquery(node: 7, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"6","label":"[6] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"5","label":"[5] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"9","label":"[9] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]}],"edges":[{"from":"8","to":"4","label":"input 0"},{"from":"8","to":"7","label":"subquery(7)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"7","to":"6","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"9","to":"8","label":"input 0"},{"from":"8","to":"9","label":"TopProjectionRule"}]}
+step FilterMergeRule {"nodes":[{"id":"9","label":"[9] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]},{"id":"8","label":"[8] Filter [exists(correlated_subquery(node: 7, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"6","label":"[6] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"5","label":"[5] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"10","label":"[10] Filter [exists(correlated_subquery(node: 7, parameters: [ref_1])), exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]}],"edges":[{"from":"9","to":"8","label":"input 0"},{"from":"8","to":"4","label":"input 0"},{"from":"8","to":"7","label":"subquery(7)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"7","to":"6","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"10","to":"3","label":"input 0"},{"from":"10","to":"2","label":"subquery(2)"},{"from":"10","to":"7","label":"subquery(7)"},{"from":"8","to":"10","label":"FilterMergeRule"}]}
+step FilterNormalizationRule {"nodes":[{"id":"9","label":"[9] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]},{"id":"10","label":"[10] Filter [exists(correlated_subquery(node: 7, parameters: [ref_1])), exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"6","label":"[6] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"5","label":"[5] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"11","label":"[11] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]}],"edges":[{"from":"9","to":"10","label":"input 0"},{"from":"10","to":"3","label":"input 0"},{"from":"10","to":"2","label":"subquery(2)"},{"from":"10","to":"7","label":"subquery(7)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"7","to":"6","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"11","to":"3","label":"input 0"},{"from":"11","to":"2","label":"subquery(2)"},{"from":"11","to":"7","label":"subquery(7)"},{"from":"10","to":"11","label":"FilterNormalizationRule"}]}
+final {"nodes":[{"id":"9","label":"[9] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]},{"id":"11","label":"[11] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 7, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"6","label":"[6] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"5","label":"[5] TableScan id: 3","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"9","to":"11","label":"input 0"},{"from":"11","to":"3","label":"input 0"},{"from":"11","to":"2","label":"subquery(2)"},{"from":"11","to":"7","label":"subquery(7)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"7","to":"6","label":"input 0"},{"from":"6","to":"5","label":"input 0"}]}
 ----
 ----
 
@@ -156,14 +156,14 @@ run
 correlated_filter_3
 ----
 ----
-[7] Filter [exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))]
+[5] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))
-  [4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]
+    - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))
+  [4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))
+      - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))
     [3] TableScan id: 2
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -171,39 +171,27 @@ correlated_filter_3
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
 
-[6] SubqueryRoot
-    - Num Columns: 5
-    - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_1.ref_0)
-    - Correlated References: cor_1.ref_0
-  [5] Filter [eq(ref_0, cor_1.ref_0)]
-      - Num Columns: 5
-      - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_1.ref_0)
-      - Correlated References: cor_1.ref_0
-    Recurring node 0
-
 
 Optimized:
-[8] Project [ref_0, ref_1, ref_2, ref_3, ref_4]
+[6] Project [ref_0, ref_1, ref_2, ref_3, ref_4]
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))
-  [10] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))]
+    - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))
+  [4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))
+      - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))
     [3] TableScan id: 2
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -211,34 +199,22 @@ Optimized:
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
 
-[6] SubqueryRoot
-    - Num Columns: 5
-    - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_1.ref_0)
-    - Correlated References: cor_1.ref_0
-  [5] Filter [eq(ref_0, cor_1.ref_0)]
-      - Num Columns: 5
-      - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_1.ref_0)
-      - Correlated References: cor_1.ref_0
-    Recurring node 0
-
-initial {"nodes":[{"id":"7","label":"[7] Filter [exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"5","label":"[5] Filter [eq(ref_0, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]}],"edges":[{"from":"7","to":"4","label":"input 0"},{"from":"7","to":"6","label":"subquery(6)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"0","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
-step TopProjectionRule {"nodes":[{"id":"7","label":"[7] Filter [exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"5","label":"[5] Filter [eq(ref_0, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"8","label":"[8] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]}],"edges":[{"from":"7","to":"4","label":"input 0"},{"from":"7","to":"6","label":"subquery(6)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"0","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"8","to":"7","label":"input 0"},{"from":"7","to":"8","label":"TopProjectionRule"}]}
-step FilterMergeRule {"nodes":[{"id":"8","label":"[8] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]},{"id":"7","label":"[7] Filter [exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"5","label":"[5] Filter [eq(ref_0, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"9","label":"[9] Filter [exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1])), exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]}],"edges":[{"from":"8","to":"7","label":"input 0"},{"from":"7","to":"4","label":"input 0"},{"from":"7","to":"6","label":"subquery(6)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"0","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"9","to":"3","label":"input 0"},{"from":"9","to":"2","label":"subquery(2)"},{"from":"9","to":"6","label":"subquery(6)"},{"from":"7","to":"9","label":"FilterMergeRule"}]}
-step FilterNormalizationRule {"nodes":[{"id":"8","label":"[8] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]},{"id":"9","label":"[9] Filter [exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1])), exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"5","label":"[5] Filter [eq(ref_0, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"10","label":"[10] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]}],"edges":[{"from":"8","to":"9","label":"input 0"},{"from":"9","to":"3","label":"input 0"},{"from":"9","to":"2","label":"subquery(2)"},{"from":"9","to":"6","label":"subquery(6)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"0","label":"input 0"},{"from":"10","to":"3","label":"input 0"},{"from":"10","to":"2","label":"subquery(2)"},{"from":"10","to":"6","label":"subquery(6)"},{"from":"9","to":"10","label":"FilterNormalizationRule"}]}
-final {"nodes":[{"id":"8","label":"[8] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]},{"id":"10","label":"[10] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1])), exists(correlated_subquery(node: 6, correlation_id: 1, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]},{"id":"5","label":"[5] Filter [eq(ref_0, cor_1.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_1.ref_0)","Correlated References: cor_1.ref_0"]}],"edges":[{"from":"8","to":"10","label":"input 0"},{"from":"10","to":"3","label":"input 0"},{"from":"10","to":"2","label":"subquery(2)"},{"from":"10","to":"6","label":"subquery(6)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"0","label":"input 0"}]}
+initial {"nodes":[{"id":"5","label":"[5] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+step TopProjectionRule {"nodes":[{"id":"5","label":"[5] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"6","label":"[6] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"6","label":"TopProjectionRule"}]}
+step FilterMergeRule {"nodes":[{"id":"6","label":"[6] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"5","label":"[5] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"7","label":"[7] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"7","to":"3","label":"input 0"},{"from":"7","to":"2","label":"subquery(2)"},{"from":"5","to":"7","label":"FilterMergeRule"}]}
+step FilterNormalizationRule {"nodes":[{"id":"6","label":"[6] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"7","label":"[7] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1])), exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]}],"edges":[{"from":"6","to":"7","label":"input 0"},{"from":"7","to":"3","label":"input 0"},{"from":"7","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"7","to":"4","label":"FilterNormalizationRule"}]}
+final {"nodes":[{"id":"6","label":"[6] Project [ref_0, ref_1, ref_2, ref_3, ref_4]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"4","label":"[4] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"6","to":"4","label":"input 0"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
 ----
 ----
 
@@ -249,10 +225,10 @@ correlated_filter_pruning
 [6] Project [ref_2]
     - Num Columns: 1
     - Row Type: string
-  [5] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]
+  [5] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))
+      - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))
     [4] Union
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -264,13 +240,13 @@ correlated_filter_pruning
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
@@ -280,10 +256,10 @@ Optimized:
 [10] Project [ref_1]
     - Num Columns: 1
     - Row Type: string
-  [9] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_0]))]
+  [9] Filter [exists(correlated_subquery(node: 2, parameters: [ref_0]))]
       - Num Columns: 2
       - Row Type: string, string
-      - Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_0]))
+      - Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_0]))
     [8] Union
         - Num Columns: 2
         - Row Type: string, string
@@ -298,19 +274,19 @@ Optimized:
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
 
-initial {"nodes":[{"id":"6","label":"[6] Project [ref_2]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"5","label":"[5] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"4","label":"[4] Union","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"3","label":"input 1"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
-step UnionPruningRule {"nodes":[{"id":"6","label":"[6] Project [ref_2]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"5","label":"[5] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))"]},{"id":"4","label":"[4] Union","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"10","label":"[10] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"9","label":"[9] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_0]))]","annotations":["Num Columns: 2","Row Type: string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_0]))"]},{"id":"8","label":"[8] Union","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"7","label":"[7] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"3","label":"input 1"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"10","to":"9","label":"input 0"},{"from":"9","to":"8","label":"input 0"},{"from":"9","to":"2","label":"subquery(2)"},{"from":"8","to":"7","label":"input 0"},{"from":"8","to":"7","label":"input 1"},{"from":"7","to":"3","label":"input 0"},{"from":"6","to":"10","label":"UnionPruningRule"}]}
-final {"nodes":[{"id":"10","label":"[10] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"9","label":"[9] Filter [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_0]))]","annotations":["Num Columns: 2","Row Type: string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_0]))"]},{"id":"8","label":"[8] Union","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"7","label":"[7] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"10","to":"9","label":"input 0"},{"from":"9","to":"8","label":"input 0"},{"from":"9","to":"2","label":"subquery(2)"},{"from":"8","to":"7","label":"input 0"},{"from":"8","to":"7","label":"input 1"},{"from":"7","to":"3","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+initial {"nodes":[{"id":"6","label":"[6] Project [ref_2]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"5","label":"[5] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"4","label":"[4] Union","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"3","label":"input 1"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+step UnionPruningRule {"nodes":[{"id":"6","label":"[6] Project [ref_2]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"5","label":"[5] Filter [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_1]))"]},{"id":"4","label":"[4] Union","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"10","label":"[10] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"9","label":"[9] Filter [exists(correlated_subquery(node: 2, parameters: [ref_0]))]","annotations":["Num Columns: 2","Row Type: string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_0]))"]},{"id":"8","label":"[8] Union","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"7","label":"[7] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string"]}],"edges":[{"from":"6","to":"5","label":"input 0"},{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"3","label":"input 1"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"10","to":"9","label":"input 0"},{"from":"9","to":"8","label":"input 0"},{"from":"9","to":"2","label":"subquery(2)"},{"from":"8","to":"7","label":"input 0"},{"from":"8","to":"7","label":"input 1"},{"from":"7","to":"3","label":"input 0"},{"from":"6","to":"10","label":"UnionPruningRule"}]}
+final {"nodes":[{"id":"10","label":"[10] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"9","label":"[9] Filter [exists(correlated_subquery(node: 2, parameters: [ref_0]))]","annotations":["Num Columns: 2","Row Type: string, string","Pulled Up Predicates: exists(correlated_subquery(node: 2, parameters: [ref_0]))"]},{"id":"8","label":"[8] Union","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"7","label":"[7] Project [ref_1, ref_2]","annotations":["Num Columns: 2","Row Type: string, string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"10","to":"9","label":"input 0"},{"from":"9","to":"8","label":"input 0"},{"from":"9","to":"2","label":"subquery(2)"},{"from":"8","to":"7","label":"input 0"},{"from":"8","to":"7","label":"input 1"},{"from":"7","to":"3","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
 ----
 ----
diff --git a/tests/testdata/explain/correlated_project.test b/tests/testdata/explain/correlated_project.test
index 432f681..dbf8f61 100644
--- a/tests/testdata/explain/correlated_project.test
+++ b/tests/testdata/explain/correlated_project.test
@@ -2,7 +2,7 @@ run
 correlated_project_1
 ----
 ----
-[4] Project [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]
+[4] Project [exists(correlated_subquery(node: 2, parameters: [ref_1]))]
     - Num Columns: 1
     - Row Type: bool
   [3] TableScan id: 2
@@ -12,20 +12,20 @@ correlated_project_1
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
 
 
 Optimized:
-[4] Project [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]
+[4] Project [exists(correlated_subquery(node: 2, parameters: [ref_1]))]
     - Num Columns: 1
     - Row Type: bool
   [3] TableScan id: 2
@@ -35,20 +35,20 @@ Optimized:
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
 
-initial {"nodes":[{"id":"4","label":"[4] Project [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+initial {"nodes":[{"id":"4","label":"[4] Project [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
 
-final {"nodes":[{"id":"4","label":"[4] Project [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+final {"nodes":[{"id":"4","label":"[4] Project [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"2","label":"subquery(2)"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
 ----
 ----
 
@@ -56,7 +56,7 @@ run
 correlated_project_pruning
 ----
 ----
-[5] Project [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]
+[5] Project [exists(correlated_subquery(node: 2, parameters: [ref_1]))]
     - Num Columns: 1
     - Row Type: bool
   [4] Union
@@ -70,20 +70,20 @@ correlated_project_pruning
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
 
 
 Optimized:
-[8] Project [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_0]))]
+[8] Project [exists(correlated_subquery(node: 2, parameters: [ref_0]))]
     - Num Columns: 1
     - Row Type: bool
   [7] Union
@@ -100,19 +100,19 @@ Optimized:
 [2] SubqueryRoot
     - Num Columns: 5
     - Row Type: string, string, string, string, string
-    - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-    - Correlated References: cor_0.ref_0
-  [1] Filter [eq(ref_0, cor_0.ref_0)]
+    - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+    - Correlated References: ctx_0.ref_0
+  [1] Filter [eq(ref_0, ctx_0.ref_0)]
       - Num Columns: 5
       - Row Type: string, string, string, string, string
-      - Pulled Up Predicates: eq(ref_0, cor_0.ref_0)
-      - Correlated References: cor_0.ref_0
+      - Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)
+      - Correlated References: ctx_0.ref_0
     [0] TableScan id: 1
         - Num Columns: 5
         - Row Type: string, string, string, string, string
 
-initial {"nodes":[{"id":"5","label":"[5] Project [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"4","label":"[4] Union","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"3","label":"input 1"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
-step UnionPruningRule {"nodes":[{"id":"5","label":"[5] Project [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_1]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"4","label":"[4] Union","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"8","label":"[8] Project [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_0]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"7","label":"[7] Union","annotations":["Num Columns: 1","Row Type: string"]},{"id":"6","label":"[6] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"3","label":"input 1"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"8","to":"7","label":"input 0"},{"from":"8","to":"2","label":"subquery(2)"},{"from":"7","to":"6","label":"input 0"},{"from":"7","to":"6","label":"input 1"},{"from":"6","to":"3","label":"input 0"},{"from":"5","to":"8","label":"UnionPruningRule"}]}
-final {"nodes":[{"id":"8","label":"[8] Project [exists(correlated_subquery(node: 2, correlation_id: 0, parameters: [ref_0]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"7","label":"[7] Union","annotations":["Num Columns: 1","Row Type: string"]},{"id":"6","label":"[6] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, cor_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, cor_0.ref_0)","Correlated References: cor_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"8","to":"7","label":"input 0"},{"from":"8","to":"2","label":"subquery(2)"},{"from":"7","to":"6","label":"input 0"},{"from":"7","to":"6","label":"input 1"},{"from":"6","to":"3","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+initial {"nodes":[{"id":"5","label":"[5] Project [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"4","label":"[4] Union","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"3","label":"input 1"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
+step UnionPruningRule {"nodes":[{"id":"5","label":"[5] Project [exists(correlated_subquery(node: 2, parameters: [ref_1]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"4","label":"[4] Union","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"8","label":"[8] Project [exists(correlated_subquery(node: 2, parameters: [ref_0]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"7","label":"[7] Union","annotations":["Num Columns: 1","Row Type: string"]},{"id":"6","label":"[6] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]}],"edges":[{"from":"5","to":"4","label":"input 0"},{"from":"5","to":"2","label":"subquery(2)"},{"from":"4","to":"3","label":"input 0"},{"from":"4","to":"3","label":"input 1"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"},{"from":"8","to":"7","label":"input 0"},{"from":"8","to":"2","label":"subquery(2)"},{"from":"7","to":"6","label":"input 0"},{"from":"7","to":"6","label":"input 1"},{"from":"6","to":"3","label":"input 0"},{"from":"5","to":"8","label":"UnionPruningRule"}]}
+final {"nodes":[{"id":"8","label":"[8] Project [exists(correlated_subquery(node: 2, parameters: [ref_0]))]","annotations":["Num Columns: 1","Row Type: bool"]},{"id":"7","label":"[7] Union","annotations":["Num Columns: 1","Row Type: string"]},{"id":"6","label":"[6] Project [ref_1]","annotations":["Num Columns: 1","Row Type: string"]},{"id":"3","label":"[3] TableScan id: 2","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]},{"id":"2","label":"[2] SubqueryRoot","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"1","label":"[1] Filter [eq(ref_0, ctx_0.ref_0)]","annotations":["Num Columns: 5","Row Type: string, string, string, string, string","Pulled Up Predicates: eq(ref_0, ctx_0.ref_0)","Correlated References: ctx_0.ref_0"]},{"id":"0","label":"[0] TableScan id: 1","annotations":["Num Columns: 5","Row Type: string, string, string, string, string"]}],"edges":[{"from":"8","to":"7","label":"input 0"},{"from":"8","to":"2","label":"subquery(2)"},{"from":"7","to":"6","label":"input 0"},{"from":"7","to":"6","label":"input 1"},{"from":"6","to":"3","label":"input 0"},{"from":"2","to":"1","label":"input 0"},{"from":"1","to":"0","label":"input 0"}]}
 ----
 ----