diff --git a/datafusion/expr/src/tree_node/expr.rs b/datafusion/expr/src/tree_node/expr.rs
index 0818ffc9ef80..fcb0a4cd93f3 100644
--- a/datafusion/expr/src/tree_node/expr.rs
+++ b/datafusion/expr/src/tree_node/expr.rs
@@ -309,7 +309,7 @@ impl TreeNode for Expr {
                 filter,
                 order_by,
             }) => match func_def {
-                AggregateFunctionDefinition::BuiltIn (fun) => {
+                AggregateFunctionDefinition::BuiltIn(fun) => {
                     Expr::AggregateFunction(AggregateFunction::new(
                         fun,
                         transform_vec(args, &mut transform)?,
diff --git a/datafusion/optimizer/src/analyzer/type_coercion.rs b/datafusion/optimizer/src/analyzer/type_coercion.rs
index c54ca196b318..bedc86e2f4f1 100644
--- a/datafusion/optimizer/src/analyzer/type_coercion.rs
+++ b/datafusion/optimizer/src/analyzer/type_coercion.rs
@@ -352,7 +352,7 @@ impl TreeNodeRewriter for TypeCoercionRewriter {
                 filter,
                 order_by,
             }) => match func_def {
-                AggregateFunctionDefinition::BuiltIn (fun) => {
+                AggregateFunctionDefinition::BuiltIn(fun) => {
                     let new_expr = coerce_agg_exprs_for_signature(
                         &fun,
                         &args,
diff --git a/datafusion/optimizer/src/decorrelate.rs b/datafusion/optimizer/src/decorrelate.rs
index 19ab52b6c57a..b1000f042c98 100644
--- a/datafusion/optimizer/src/decorrelate.rs
+++ b/datafusion/optimizer/src/decorrelate.rs
@@ -374,7 +374,7 @@ fn agg_exprs_evaluation_result_on_empty_batch(
             let new_expr = match expr {
                 Expr::AggregateFunction(expr::AggregateFunction { func_def, .. }) => {
                     match func_def {
-                        AggregateFunctionDefinition::BuiltIn (fun) => {
+                        AggregateFunctionDefinition::BuiltIn(fun) => {
                             if matches!(fun, datafusion_expr::AggregateFunction::Count) {
                                 Transformed::Yes(Expr::Literal(ScalarValue::Int64(Some(
                                     0,
diff --git a/datafusion/proto/src/logical_plan/to_proto.rs b/datafusion/proto/src/logical_plan/to_proto.rs
index ac5a59533645..6bfd4c3438f5 100644
--- a/datafusion/proto/src/logical_plan/to_proto.rs
+++ b/datafusion/proto/src/logical_plan/to_proto.rs
@@ -660,7 +660,7 @@ impl TryFrom<&Expr> for protobuf::LogicalExprNode {
                 ref order_by,
             }) => {
                 match func_def {
-                    AggregateFunctionDefinition::BuiltIn (fun) => {
+                    AggregateFunctionDefinition::BuiltIn(fun) => {
                         let aggr_function = match fun {
                             AggregateFunction::ApproxDistinct => {
                                 protobuf::AggregateFunction::ApproxDistinct