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Support window functions a la SQL:2008.

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Hitoshi Harada, with some kibitzing from Heikki and Tom.
This commit is contained in:
Tom Lane
2008-12-28 18:54:01 +00:00
parent 38e9348282
commit 95b07bc7f5
92 changed files with 6720 additions and 321 deletions
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8
src/backend/optimizer/prep/prepjointree.c
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@ -16,7 +16,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/prep/prepjointree.c,v 1.60 2008/11/11 19:05:21 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/prep/prepjointree.c,v 1.61 2008/12/28 18:53:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -742,7 +742,10 @@ pull_up_simple_subquery(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte,
* Miscellaneous housekeeping.
*/
parse->hasSubLinks |= subquery->hasSubLinks;
/* subquery won't be pulled up if it hasAggs, so no work there */
/*
* subquery won't be pulled up if it hasAggs or hasWindowFuncs, so no
* work needed on those flags
*/
/*
* Return the adjusted subquery jointree to replace the RangeTblRef entry
@ -931,6 +934,7 @@ is_simple_subquery(Query *subquery)
* limiting, or WITH. (XXX WITH could possibly be allowed later)
*/
if (subquery->hasAggs ||
subquery->hasWindowFuncs ||
subquery->groupClause ||
subquery->havingQual ||
subquery->sortClause ||