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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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45
src/backend/nodes/readfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.217 2008/11/15 19:43:46 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.218 2008/12/28 18:53:56 tgl Exp $
*
* NOTES
* Path and Plan nodes do not have any readfuncs support, because we
@ -153,6 +153,7 @@ _readQuery(void)
READ_INT_FIELD(resultRelation);
READ_NODE_FIELD(intoClause);
READ_BOOL_FIELD(hasAggs);
READ_BOOL_FIELD(hasWindowFuncs);
READ_BOOL_FIELD(hasSubLinks);
READ_BOOL_FIELD(hasDistinctOn);
READ_BOOL_FIELD(hasRecursive);
@ -163,6 +164,7 @@ _readQuery(void)
READ_NODE_FIELD(returningList);
READ_NODE_FIELD(groupClause);
READ_NODE_FIELD(havingQual);
READ_NODE_FIELD(windowClause);
READ_NODE_FIELD(distinctClause);
READ_NODE_FIELD(sortClause);
READ_NODE_FIELD(limitOffset);
@ -217,6 +219,24 @@ _readSortGroupClause(void)
READ_DONE();
}
/*
* _readWindowClause
*/
static WindowClause *
_readWindowClause(void)
{
READ_LOCALS(WindowClause);
READ_STRING_FIELD(name);
READ_STRING_FIELD(refname);
READ_NODE_FIELD(partitionClause);
READ_NODE_FIELD(orderClause);
READ_UINT_FIELD(winref);
READ_BOOL_FIELD(copiedOrder);
READ_DONE();
}
/*
* _readRowMarkClause
*/
@ -402,6 +422,25 @@ _readAggref(void)
READ_DONE();
}
/*
* _readWindowFunc
*/
static WindowFunc *
_readWindowFunc(void)
{
READ_LOCALS(WindowFunc);
READ_OID_FIELD(winfnoid);
READ_OID_FIELD(wintype);
READ_NODE_FIELD(args);
READ_UINT_FIELD(winref);
READ_BOOL_FIELD(winstar);
READ_BOOL_FIELD(winagg);
READ_LOCATION_FIELD(location);
READ_DONE();
}
/*
* _readArrayRef
*/
@ -1091,6 +1130,8 @@ parseNodeString(void)
return_value = _readQuery();
else if (MATCH("SORTGROUPCLAUSE", 15))
return_value = _readSortGroupClause();
else if (MATCH("WINDOWCLAUSE", 12))
return_value = _readWindowClause();
else if (MATCH("ROWMARKCLAUSE", 13))
return_value = _readRowMarkClause();
else if (MATCH("COMMONTABLEEXPR", 15))
@ -1111,6 +1152,8 @@ parseNodeString(void)
return_value = _readParam();
else if (MATCH("AGGREF", 6))
return_value = _readAggref();
else if (MATCH("WINDOWFUNC", 10))
return_value = _readWindowFunc();
else if (MATCH("ARRAYREF", 8))
return_value = _readArrayRef();
else if (MATCH("FUNCEXPR", 8))