DELETE not working on artist table and maybe other tables

[Paxxil]

I noticed that statistics from musicbrainz and my database is not equal, so I investigated and found out, that replication updates don't delete the artists.....

I think the issue is in NULL fields in WHERE clause ... if it is empty it means NULL but i think it passes empty string instead, so query gets no results....

23485645 | 56167 | nz"."artist | d | 183711504 | NULL | "id"='53240' "name"='824319' "sort_name"='824319' "type"='2' "country"= "gender"=

I don't know why all this stuff is needed in WHERE clause... ID would be enough.

EDIT:
Just checked it is the same with table "release"

[Paxxil]

Problem is that mysql uses 'field IS NULL' and not 'field = NULL' in WHERE clauses.
It is bug in this script because it uses 'field = NULL' for all SQL queries, but it should only be for SET and 'field IS NULL' for WHERE