One issue is that it creates new list/docs/board/graph nodes.

This reverts commit 5d658a43.

NOTE: Does not compile

This is because to_tsquery doesn't work with multiple words not
separated by AND or OR.

This reverts commit 29ee1972.

It introduces a bug, it should not be merged.

However, the code doesn't work currently.

This has couple of drawbacks:
- we use postgres-simple and a raw sql query, opaleye would be better
I guess
- there is a hack for empty query, this should be replaced by
removing the WHERE clause in this case

Now the job doesn't return 'succeeded' fields when it actually fails.