From ec4be2ee6827b6bd85e0813c7a8993cfbb0e6fa7 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Fri, 12 Feb 2010 17:33:21 +0000 Subject: Extend the set of frame options supported for window functions. This patch allows the frame to start from CURRENT ROW (in either RANGE or ROWS mode), and it also adds support for ROWS n PRECEDING and ROWS n FOLLOWING start and end points. (RANGE value PRECEDING/FOLLOWING isn't there yet --- the grammar works, but that's all.) Hitoshi Harada, reviewed by Pavel Stehule --- src/backend/nodes/nodeFuncs.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'src/backend/nodes/nodeFuncs.c') diff --git a/src/backend/nodes/nodeFuncs.c b/src/backend/nodes/nodeFuncs.c index 76b22b4518e..c8c3202df45 100644 --- a/src/backend/nodes/nodeFuncs.c +++ b/src/backend/nodes/nodeFuncs.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/nodes/nodeFuncs.c,v 1.45 2010/01/02 16:57:46 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/nodes/nodeFuncs.c,v 1.46 2010/02/12 17:33:20 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1298,6 +1298,10 @@ expression_tree_walker(Node *node, return true; if (walker(wc->orderClause, context)) return true; + if (walker(wc->startOffset, context)) + return true; + if (walker(wc->endOffset, context)) + return true; } break; case T_CommonTableExpr: @@ -1950,6 +1954,8 @@ expression_tree_mutator(Node *node, FLATCOPY(newnode, wc, WindowClause); MUTATE(newnode->partitionClause, wc->partitionClause, List *); MUTATE(newnode->orderClause, wc->orderClause, List *); + MUTATE(newnode->startOffset, wc->startOffset, Node *); + MUTATE(newnode->endOffset, wc->endOffset, Node *); return (Node *) newnode; } break; @@ -2475,6 +2481,10 @@ bool return true; if (walker(wd->orderClause, context)) return true; + if (walker(wd->startOffset, context)) + return true; + if (walker(wd->endOffset, context)) + return true; } break; case T_RangeSubselect: -- cgit v1.2.3