cleaned-up & streamlined code in DFLOWeligible()
cleaned-up & streamlined code in DFLOWeligible()

Only minor improvements for tests sql/src/test/rdf/Tests/q?_v.sql .

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