15.11.2012 0:16, vanderlinde81 wrote: > > The Query in FireBird: > > SELECT FIRST 30 SKIP 0 distinct tr.IdLink, tr.IdTargetLink, tr.IdItem, > tr.NodePosition
What about reordering the fields as SELECT FIRST 30 SKIP 0 distinct tr.NodePosition, tr.IdLink, tr.IdTargetLink, tr.IdItem I'd expect PLAN to change to > PLAN SORT (JOIN (TR INDEX (IDX_TREE3_2, IDX_TREE3_3), ART INDEX > (RDB$PRIMARY2))) that would eliminate one of the sorts. > 873424 fetches, 0 marks, 12892 reads, 0 writes. What is your page cache setting? Dmitry
