getkirby/toolkit — pull request #36 by lukasbestle (2014-12-21 13:23:09+00:00)
Title: Add null to list of SQL literals

Trying to set a value to `null` before resulted in a string value of `''` (empty string) instead of an actual null value.
The string `'null'` is not affected by this change and will still result in a string value of `'null'` in the DB.