diff --git a/datafusion/expr/src/built_in_function.rs b/datafusion/expr/src/built_in_function.rs
index 91e3acd0f7bb0..179d7c6ee1b63 100644
--- a/datafusion/expr/src/built_in_function.rs
+++ b/datafusion/expr/src/built_in_function.rs
@@ -26,9 +26,7 @@ use std::sync::{Arc, OnceLock};
 use crate::signature::TIMEZONE_WILDCARD;
 use crate::type_coercion::binary::get_wider_type;
 use crate::type_coercion::functions::data_types;
-use crate::{
-    conditional_expressions, FuncMonotonicity, Signature, TypeSignature, Volatility,
-};
+use crate::{FuncMonotonicity, Signature, TypeSignature, Volatility};
 
 use arrow::datatypes::{DataType, Field, Fields, IntervalUnit, TimeUnit};
 use datafusion_common::{exec_err, plan_err, DataFusionError, Result};
@@ -941,10 +939,9 @@ impl BuiltinScalarFunction {
             | BuiltinScalarFunction::ConcatWithSeparator => {
                 Signature::variadic(vec![Utf8], self.volatility())
             }
-            BuiltinScalarFunction::Coalesce => Signature::variadic(
-                conditional_expressions::SUPPORTED_COALESCE_TYPES.to_vec(),
-                self.volatility(),
-            ),
+            BuiltinScalarFunction::Coalesce => {
+                Signature::variadic_equal(self.volatility())
+            }
             BuiltinScalarFunction::SHA224
             | BuiltinScalarFunction::SHA256
             | BuiltinScalarFunction::SHA384
diff --git a/datafusion/expr/src/conditional_expressions.rs b/datafusion/expr/src/conditional_expressions.rs
index 1346825f054da..7a2bf4b6c44a0 100644
--- a/datafusion/expr/src/conditional_expressions.rs
+++ b/datafusion/expr/src/conditional_expressions.rs
@@ -22,25 +22,6 @@ use arrow::datatypes::DataType;
 use datafusion_common::{plan_err, DFSchema, Result};
 use std::collections::HashSet;
 
-/// Currently supported types by the coalesce function.
-/// The order of these types correspond to the order on which coercion applies
-/// This should thus be from least informative to most informative
-pub static SUPPORTED_COALESCE_TYPES: &[DataType] = &[
-    DataType::Boolean,
-    DataType::UInt8,
-    DataType::UInt16,
-    DataType::UInt32,
-    DataType::UInt64,
-    DataType::Int8,
-    DataType::Int16,
-    DataType::Int32,
-    DataType::Int64,
-    DataType::Float32,
-    DataType::Float64,
-    DataType::Utf8,
-    DataType::LargeUtf8,
-];
-
 /// Helper struct for building [Expr::Case]
 pub struct CaseBuilder {
     expr: Option<Box<Expr>>,