Setting up a new wiki using postgres, the SQL commands broke on me when I ran 'php5 update.php' from the maintenance directory. The error message was balking on 'unsigned' being a syntax error - apparently psql doesn't like 'unsigned' as they don't exist (syntax error pointed to includes/sql/user_google_user.sql). This is with v0.1.3 on mw 1.23 and psql 9.4.
As it was a new setup, I just remade it with mysql and the extension then worked as expected.