Fix problem with Child_First-Expression and not using tableNameAlias
Fix problem with Child_First-Expression and not using tableNameAlias

This resultet in sql-exception "Unknown column 'xxxx.id' in 'where clause'"

This got lost with phabricator change. Commit-id in phabricator:
6f8f2def6173294dd21f808028f4bc8dab87e434
Author-Date: 15.12.2017 09:11; Branch 3.9.
Previous commit  in phabricator is existent. (827d05f7d2c0996e4aba6dbc9d7155cff5c5a460)

koala-framework/koala-framework,koala-framework/koala-framework