From 96fce4db87dfc39c2beab43960509f81b625b53c Mon Sep 17 00:00:00 2001
From: chen-chukun <93969342+chen-chukun@users.noreply.github.com>
Date: Tue, 9 Nov 2021 14:46:58 +0800
Subject: [PATCH] Fixed conv function max_ length bug

---
 sql/item_strfunc.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc
index cd87dd18d4e5..230da60cefaf 100644
--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -3734,7 +3734,7 @@ String *Item_func_lpad::val_str(String *str)
 void Item_func_conv::fix_length_and_dec()
 {
   collation.set(default_charset());
-  max_length=64;
+  fix_char_length(64);
   maybe_null= 1;
   reject_geometry_args(arg_count, args, this);
 }