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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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17
src/include/nodes/primnodes.h
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@@ -10,7 +10,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/nodes/primnodes.h,v 1.143 2008/10/06 17:39:26 tgl Exp $
* $PostgreSQL: pgsql/src/include/nodes/primnodes.h,v 1.144 2008/12/28 18:54:00 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -222,6 +222,21 @@ typedef struct Aggref
int location; /* token location, or -1 if unknown */
} Aggref;
/*
* WindowFunc
*/
typedef struct WindowFunc
{
Expr xpr;
Oid winfnoid; /* pg_proc Oid of the function */
Oid wintype; /* type Oid of result of the window function */
List *args; /* arguments to the window function */
Index winref; /* index of associated WindowClause */
bool winstar; /* TRUE if argument list was really '*' */
bool winagg; /* is function a simple aggregate? */
int location; /* token location, or -1 if unknown */
} WindowFunc;
/* ----------------
* ArrayRef: describes an array subscripting operation
*