Split topics interface didn't work in postgre - Thanks c2h5oh for the
report

Signed-off-by: emanuele <emanuele45@gmail.com>
type error on bulk delete members - Thanks Tyris for the fix!

Signed-off-by: emanuele <emanuele45@gmail.com>
Merge pull request #234 from emanuele45/some_postgre_fix

Some postgre fix