database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-15 19:21:59 +03:00
Code Activity

Add some basic support for window frame clauses to the window-functions

Browse Source 
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.
This commit is contained in:
Tom Lane
2008-12-31 00:08:39 +00:00
parent 0fb9be7acf
commit 8e8854daa2
24 changed files with 757 additions and 307 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/backend/nodes/outfuncs.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.347 2008/12/28 18:53:56 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.348 2008/12/31 00:08:36 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -575,6 +575,7 @@ _outWindowAgg(StringInfo str, WindowAgg *node)
_outPlanInfo(str, (Plan *) node);
WRITE_UINT_FIELD(winref);
WRITE_INT_FIELD(partNumCols);
appendStringInfo(str, " :partColIdx");
@ -594,6 +595,8 @@ _outWindowAgg(StringInfo str, WindowAgg *node)
appendStringInfo(str, " :ordOperations");
for (i = 0; i < node->ordNumCols; i++)
appendStringInfo(str, " %u", node->ordOperators[i]);
WRITE_INT_FIELD(frameOptions);
}
static void
@ -1953,6 +1956,7 @@ _outWindowClause(StringInfo str, WindowClause *node)
WRITE_STRING_FIELD(refname);
WRITE_NODE_FIELD(partitionClause);
WRITE_NODE_FIELD(orderClause);
WRITE_INT_FIELD(frameOptions);
WRITE_UINT_FIELD(winref);
WRITE_BOOL_FIELD(copiedOrder);
}
@ -2242,6 +2246,7 @@ _outWindowDef(StringInfo str, WindowDef *node)
WRITE_STRING_FIELD(refname);
WRITE_NODE_FIELD(partitionClause);
WRITE_NODE_FIELD(orderClause);
WRITE_INT_FIELD(frameOptions);
WRITE_LOCATION_FIELD(location);
}