list_add

Syntax

sys.list_add(list,value)

Description

list_add is a stored function available with the Sys Schema.

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

The related function list_drop can be used to drop a value from 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_add(@@sql_mode, 'NO_ZERO_DATE');

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

See Also

• list_drop

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