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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2010-02-12 17:33:21 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2010-02-12 17:33:21 +0000 |
| commit | ec4be2ee6827b6bd85e0813c7a8993cfbb0e6fa7 (patch) | |
| tree | f4f98eb0f5ff45dbcd23778a1c683a1f597431b7 /src/backend/nodes/nodeFuncs.c | |
| parent | a5348fafd182d5b84c89b43af3746711ce28f319 (diff) | |
| download | postgresql-ec4be2ee6827b6bd85e0813c7a8993cfbb0e6fa7.tar.gz postgresql-ec4be2ee6827b6bd85e0813c7a8993cfbb0e6fa7.zip | |
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
Diffstat (limited to 'src/backend/nodes/nodeFuncs.c')
| -rw-r--r-- | src/backend/nodes/nodeFuncs.c | 12 |
1 files changed, 11 insertions, 1 deletions
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: |