Revert "Fixed Doc.source_dbs with PostgreSQL"
Revert "Fixed Doc.source_dbs with PostgreSQL"

This reverts commit 2267c94084e2208ad1146b6ea746a577c785fd77.

pubannotation/pubannotation,pubannotation/pubannotation,pubannotation/pubannotation,pubannotation/pubannotation