MDEV-13149 -- show function status now works with PAD_CHAR_TO_FULL_LENGTH

mysql-test/r/show_function_with_pad_char_to_full_length.result

+create function f() returns int return 1;
+show function status;
+Db	Name	Type	Definer	Modified	Created	Security_type	Comment	character_set_client	collation_connection	Database Collation
+T	f	T	T	T	T	T	T	T	T	T
+set sql_mode = 'PAD_CHAR_TO_FULL_LENGTH';
+show function status;
+Db	Name	Type	Definer	Modified	Created	Security_type	Comment	character_set_client	collation_connection	Database Collation
+T	f	T	T	T	T	T	T	T	T	T
+drop function f;
+select @@sql_mode;
+@@sql_mode
+PAD_CHAR_TO_FULL_LENGTH
+create function f() returns int return 1;
+select ROUTINE_NAME from information_schema.ROUTINES where ROUTINE_NAME='f';
+ROUTINE_NAME
+f
+set sql_mode = 'PAD_CHAR_TO_FULL_LENGTH';
+select ROUTINE_NAME from information_schema.ROUTINES where ROUTINE_NAME='f';
+ROUTINE_NAME
+f
+drop function f;
+select @@sql_mode;
+@@sql_mode
+PAD_CHAR_TO_FULL_LENGTH

mysql-test/t/show_function_with_pad_char_to_full_length.test

+#
+# Test that show function status succeeds with
+# sql_mode = 'PAD_CHAR_TO_FULL_LENGTH (MDEV-13149)
+
+# show function status
+
+create function f() returns int return 1;
+--replace_column 1 T 3 T 4 T 5 T 6 T 7 T 8 T 9 T 10 T 11 T
+show function status;
+set sql_mode = 'PAD_CHAR_TO_FULL_LENGTH';
+--replace_column 1 T 3 T 4 T 5 T 6 T 7 T 8 T 9 T 10 T 11 T
+show function status;
+drop function f;
+select @@sql_mode;
+
+# select ROUTINE_NAME from information_schema.ROUTINES
+
+create function f() returns int return 1;
+select ROUTINE_NAME from information_schema.ROUTINES where ROUTINE_NAME='f';
+set sql_mode = 'PAD_CHAR_TO_FULL_LENGTH';
+select ROUTINE_NAME from information_schema.ROUTINES where ROUTINE_NAME='f';
+drop function f;
+select @@sql_mode;

sql/sql_show.cc

@@ -5716,6 +5716,10 @@ int fill_schema_proc(THD *thd, TABLE_LIST *tables, COND *cond)
     DBUG_RETURN(1);
   }
 
+  /* Disable padding temporarily so it doesn't break the query */
+  ulonglong sql_mode_was = thd->variables.sql_mode;
+  thd->variables.sql_mode &= ~MODE_PAD_CHAR_TO_FULL_LENGTH;
+
   if (proc_table->file->ha_index_init(0, 1))
   {
     res= 1;
@@ -5751,6 +5755,7 @@ int fill_schema_proc(THD *thd, TABLE_LIST *tables, COND *cond)
     (void) proc_table->file->ha_index_end();
 
   close_system_tables(thd, &open_tables_state_backup);
+  thd->variables.sql_mode = sql_mode_was;
   DBUG_RETURN(res);
 }