improved partition elimination code (also properly disable caching in case we eliminated parts)
improved partition elimination code (also properly disable caching in case
we eliminated parts)

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb