From 8e8854daa2b4b3ef9e3fc1a56c79608a70018058 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Wed, 31 Dec 2008 00:08:39 +0000 Subject: Add some basic support for window frame clauses to the window-functions patch. This includes the ability to force the frame to cover the whole partition, and the ability to make the frame end exactly on the current row rather than its last ORDER BY peer. Supporting any more of the full SQL frame-clause syntax will require nontrivial hacking on the window aggregate code, so it'll have to wait for 8.5 or beyond. --- src/backend/optimizer/plan/createplan.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'src/backend/optimizer/plan/createplan.c') diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c index b53b5e1470e..55baa9a51a6 100644 --- a/src/backend/optimizer/plan/createplan.c +++ b/src/backend/optimizer/plan/createplan.c @@ -10,7 +10,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.253 2008/12/28 18:53:56 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.254 2008/12/31 00:08:36 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -3261,22 +3261,25 @@ make_agg(PlannerInfo *root, List *tlist, List *qual, } WindowAgg * -make_windowagg(PlannerInfo *root, List *tlist, int numWindowFuncs, +make_windowagg(PlannerInfo *root, List *tlist, + int numWindowFuncs, Index winref, int partNumCols, AttrNumber *partColIdx, Oid *partOperators, int ordNumCols, AttrNumber *ordColIdx, Oid *ordOperators, - Plan *lefttree) + int frameOptions, Plan *lefttree) { WindowAgg *node = makeNode(WindowAgg); Plan *plan = &node->plan; Path windowagg_path; /* dummy for result of cost_windowagg */ QualCost qual_cost; + node->winref = winref; node->partNumCols = partNumCols; node->partColIdx = partColIdx; node->partOperators = partOperators; node->ordNumCols = ordNumCols; node->ordColIdx = ordColIdx; node->ordOperators = ordOperators; + node->frameOptions = frameOptions; copy_plan_costsize(plan, lefttree); /* only care about copying size */ cost_windowagg(&windowagg_path, root, -- cgit v1.2.3