md_src_plugins_null_README(3) README

Special Values

The plugin transcodes all null values to @NULL, all empty strings to @EMPTY, and all strings starting with @ to begin with @@.


In order to use the null plugin you must add null to info/needs in the plugin you wish to use.

Once null is included in infos/needs, the null plugin will filter values for the storage plugin. As a result, the storage plugin will never come across a null value or an empty string, instead it will be get strings with @NULL and @EMPTY respectively.