add upper bound for pub fn (#1713)

Signed-off-by: remzi <[email protected]>
apache · Jan 31, 2022 · d01d8d5 · d01d8d5
1 parent f849968
commit d01d8d5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/datafusion/src/physical_plan/aggregates.rs b/datafusion/src/physical_plan/aggregates.rs
@@ -359,7 +359,7 @@ static TIMESTAMPS: &[DataType] = &[
 static DATES: &[DataType] = &[DataType::Date32, DataType::Date64];
 
 /// the signatures supported by the function `fun`.
-pub fn signature(fun: &AggregateFunction) -> Signature {
+pub(super) fn signature(fun: &AggregateFunction) -> Signature {
     // note: the physical expression must accept the type returned by this function or the execution panics.
     match fun {
         AggregateFunction::Count