From d01d8d5e56a47d2309d0946fdae89ab3c2c550e0 Mon Sep 17 00:00:00 2001
From: Remzi Yang <59198230+HaoYang670@users.noreply.github.com>
Date: Tue, 1 Feb 2022 04:36:49 +0800
Subject: [PATCH] add upper bound for pub fn (#1713)

Signed-off-by: remzi <13716567376yh@gmail.com>
---
 datafusion/src/physical_plan/aggregates.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/datafusion/src/physical_plan/aggregates.rs b/datafusion/src/physical_plan/aggregates.rs
index f7beb76df3bc..c40fd7104201 100644
--- 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