added some missing return values (multiple return values are nice, but without a result signature and static type checking mistakes are easily made)
added some missing return values (multiple return values are nice, but without
a result signature and static type checking mistakes are easily made)

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