cleanup: use is_supported_parser_charset

sql/sql_class.h

@@ -801,6 +801,10 @@ mysqld_collation_get_by_name(const char *name,
   return cs;
 }
 
+inline bool is_supported_parser_charset(CHARSET_INFO *cs)
+{
+  return MY_TEST(cs->mbminlen == 1);
+}
 
 #ifdef MYSQL_SERVER
 

sql/sql_parse.h

@@ -198,9 +198,4 @@ check_table_access(THD *thd, ulong requirements,TABLE_LIST *tables,
 
 bool check_global_access(THD *thd, ulong want_access, bool no_errors= false);
 
-inline bool is_supported_parser_charset(CHARSET_INFO *cs)
-{
-  return MY_TEST(cs->mbminlen == 1);
-}
-
 #endif /* SQL_PARSE_INCLUDED */

sql/sys_vars.cc

@@ -622,8 +622,7 @@ static bool check_cs_client(sys_var *self, THD *thd, set_var *var)
   if (check_charset_not_null(self, thd, var))
     return true;
 
-  // Currently, UCS-2 cannot be used as a client character set
-  if (((CHARSET_INFO *)(var->save_result.ptr))->mbminlen > 1)
+  if (!is_supported_parser_charset((CHARSET_INFO *)(var->save_result.ptr)))
     return true;
 
   return false;