diff --git a/src/query/service/src/pipelines/processors/transforms/hash_join/probe_join/left_join.rs b/src/query/service/src/pipelines/processors/transforms/hash_join/probe_join/left_join.rs
index b2074b35ed82..11e9e4bac56a 100644
--- a/src/query/service/src/pipelines/processors/transforms/hash_join/probe_join/left_join.rs
+++ b/src/query/service/src/pipelines/processors/transforms/hash_join/probe_join/left_join.rs
@@ -403,7 +403,7 @@ impl HashJoinProbeState {
                 let new_matched_count = old_mactehd_counts + 1;
                 if old_mactehd_counts > 0 {
                     return Err(ErrorCode::UnresolvableConflict(
-                        "multi rows from source match one and the same row in the target_table multi times",
+                        "multi rows from source match one and the same row in the target_table multi times in probe phase",
                     ));
                 }
                 loop {
diff --git a/src/query/service/src/pipelines/processors/transforms/hash_join/transform_hash_join_probe.rs b/src/query/service/src/pipelines/processors/transforms/hash_join/transform_hash_join_probe.rs
index d694f01222d8..dbb33b1ec91b 100644
--- a/src/query/service/src/pipelines/processors/transforms/hash_join/transform_hash_join_probe.rs
+++ b/src/query/service/src/pipelines/processors/transforms/hash_join/transform_hash_join_probe.rs
@@ -133,6 +133,10 @@ impl TransformHashJoinProbe {
         if item.0.is_empty() {
             let prefix = item.1;
             let (segment_idx, block_idx) = split_prefix(prefix);
+            info!(
+                "matched whole block: segment_idx: {}, block_idx: {}",
+                segment_idx, block_idx
+            );
             let data_block = DataBlock::empty_with_meta(Box::new(BlockMetaIndex {
                 segment_idx: segment_idx as usize,
                 block_idx: block_idx as usize,
@@ -156,6 +160,10 @@ impl TransformHashJoinProbe {
                 )?;
                 assert!(!data_block.is_empty());
                 let (segment_idx, block_idx) = split_prefix(prefix);
+                info!(
+                    "matched partial block: segment_idx: {}, block_idx: {}",
+                    segment_idx, block_idx
+                );
                 let data_block = data_block.add_meta(Some(Box::new(BlockMetaIndex {
                     segment_idx: segment_idx as usize,
                     block_idx: block_idx as usize,
diff --git a/src/query/storages/fuse/src/operations/merge_into/mutator/matched_mutator.rs b/src/query/storages/fuse/src/operations/merge_into/mutator/matched_mutator.rs
index df4eaa9443f9..d9b3b63b737f 100644
--- a/src/query/storages/fuse/src/operations/merge_into/mutator/matched_mutator.rs
+++ b/src/query/storages/fuse/src/operations/merge_into/mutator/matched_mutator.rs
@@ -144,6 +144,10 @@ impl MatchedAggregator {
                     .meta_indexes
                     .insert((meta_index.segment_idx, meta_index.block_idx))
                 {
+                    info!(
+                        "duplicated block: segment_idx: {}, block_idx: {}",
+                        meta_index.segment_idx, meta_index.block_idx
+                    );
                     return Err(ErrorCode::Internal(
                         "merge into get duplicated block for target build unmodified optimization",
                     ));
diff --git a/tests/sqllogictests/suites/mode/standalone/explain/09_0039_target_build_merge_into_standalone.test b/tests/sqllogictests/suites/mode/standalone/explain/09_0039_target_build_merge_into_standalone.test
index b31b20b9083a..e9cdadf2b9a9 100644
--- a/tests/sqllogictests/suites/mode/standalone/explain/09_0039_target_build_merge_into_standalone.test
+++ b/tests/sqllogictests/suites/mode/standalone/explain/09_0039_target_build_merge_into_standalone.test
@@ -286,7 +286,7 @@ target_table: default.default.target_build_optimization
 query TT
 merge into target_build_optimization as t1 using source_optimization as t2 on t1.a > t2.a and t1.b = t2.b when matched then update * when not matched then insert *;
 ----
-12 0
+10 0
 
 query TTT
 select * from target_build_optimization order by a,b,c;