list_drop

Syntax

sys.list_drop(list,value)

Description

list_drop is a stored function available with the Sys Schema.

It takes a list to be be modified and a value to be dropped from the list, returning the resulting value. This can be used, for example, to remove a value from a system variable taking a comma-delimited list of options, such as sql_mode.

The related function list_add can be used to add a value to a list.

Examples

SELECT @@sql_mode;
+-----------------------------------------------------------------------+
| @@sql_mode                                                            |
+-----------------------------------------------------------------------+
| STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,
NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
+-----------------------------------------------------------------------+

SET @@sql_mode = sys.list_drop(@@sql_mode, 'NO_ENGINE_SUBSTITUTION');

SELECT @@sql_mode;
+-----------------------------------------------------------------------+
| @@sql_mode                                                            |
+-----------------------------------------------------------------------+
| STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,
NO_AUTO_CREATE_USER |
+-----------------------------------------------------------------------+

See Also

• list_add

_{This page is licensed: CC BY-SA / Gnu FDL}