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Extend the set of frame options supported for window functions.

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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
This commit is contained in:
Tom Lane
2010-02-12 17:33:21 +00:00
parent a5348fafd1
commit ec4be2ee68
28 changed files with 1237 additions and 254 deletions
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8
src/backend/nodes/outfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.381 2010/01/28 23:21:12 petere Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.382 2010/02/12 17:33:20 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -610,6 +610,8 @@ _outWindowAgg(StringInfo str, WindowAgg *node)
appendStringInfo(str, " %u", node->ordOperators[i]);
WRITE_INT_FIELD(frameOptions);
WRITE_NODE_FIELD(startOffset);
WRITE_NODE_FIELD(endOffset);
}
static void
@ -2035,6 +2037,8 @@ _outWindowClause(StringInfo str, WindowClause *node)
WRITE_NODE_FIELD(partitionClause);
WRITE_NODE_FIELD(orderClause);
WRITE_INT_FIELD(frameOptions);
WRITE_NODE_FIELD(startOffset);
WRITE_NODE_FIELD(endOffset);
WRITE_UINT_FIELD(winref);
WRITE_BOOL_FIELD(copiedOrder);
}
@ -2326,6 +2330,8 @@ _outWindowDef(StringInfo str, WindowDef *node)
WRITE_NODE_FIELD(partitionClause);
WRITE_NODE_FIELD(orderClause);
WRITE_INT_FIELD(frameOptions);
WRITE_NODE_FIELD(startOffset);
WRITE_NODE_FIELD(endOffset);
WRITE_LOCATION_FIELD(location);
}