postgresql/src/include/executor/nodeWindowAgg.h

/*-------------------------------------------------------------------------
 *
 * nodeWindowAgg.h
 *	  prototypes for nodeWindowAgg.c
 *
 *
 * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * $PostgreSQL: pgsql/src/include/executor/nodeWindowAgg.h,v 1.5 2010/07/12 17:01:06 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef NODEWINDOWAGG_H
#define NODEWINDOWAGG_H

#include "nodes/execnodes.h"

extern WindowAggState *ExecInitWindowAgg(WindowAgg *node, EState *estate, int eflags);
extern TupleTableSlot *ExecWindowAgg(WindowAggState *node);
extern void ExecEndWindowAgg(WindowAggState *node);
extern void ExecReScanWindowAgg(WindowAggState *node);

#endif   /* NODEWINDOWAGG_H */
Support window functions a la SQL:2008. Hitoshi Harada, with some kibitzing from Heikki and Tom. 2008-12-28 19:54:01 +01:00			`/*-------------------------------------------------------------------------`
			`*`
			`* nodeWindowAgg.h`
			`* prototypes for nodeWindowAgg.c`
			`*`
			`*`
Update copyright for the year 2010. 2010-01-02 17:58:17 +01:00			`* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group`
Support window functions a la SQL:2008. Hitoshi Harada, with some kibitzing from Heikki and Tom. 2008-12-28 19:54:01 +01:00			`* Portions Copyright (c) 1994, Regents of the University of California`
			`*`
Make NestLoop plan nodes pass outer-relation variables into their inner relation using the general PARAM_EXEC executor parameter mechanism, rather than the ad-hoc kluge of passing the outer tuple down through ExecReScan. The previous method was hard to understand and could never be extended to handle parameters coming from multiple join levels. This patch doesn't change the set of possible plans nor have any significant performance effect, but it's necessary infrastructure for future generalization of the concept of an inner indexscan plan. ExecReScan's second parameter is now unused, so it's removed. 2010-07-12 19:01:06 +02:00			`* $PostgreSQL: pgsql/src/include/executor/nodeWindowAgg.h,v 1.5 2010/07/12 17:01:06 tgl Exp $`
Support window functions a la SQL:2008. Hitoshi Harada, with some kibitzing from Heikki and Tom. 2008-12-28 19:54:01 +01:00			`*`
			`*-------------------------------------------------------------------------`
			`*/`
			`#ifndef NODEWINDOWAGG_H`
			`#define NODEWINDOWAGG_H`

			`#include "nodes/execnodes.h"`

			`extern WindowAggState ExecInitWindowAgg(WindowAgg node, EState *estate, int eflags);`
			`extern TupleTableSlot ExecWindowAgg(WindowAggState node);`
			`extern void ExecEndWindowAgg(WindowAggState *node);`
Make NestLoop plan nodes pass outer-relation variables into their inner relation using the general PARAM_EXEC executor parameter mechanism, rather than the ad-hoc kluge of passing the outer tuple down through ExecReScan. The previous method was hard to understand and could never be extended to handle parameters coming from multiple join levels. This patch doesn't change the set of possible plans nor have any significant performance effect, but it's necessary infrastructure for future generalization of the concept of an inner indexscan plan. ExecReScan's second parameter is now unused, so it's removed. 2010-07-12 19:01:06 +02:00			`extern void ExecReScanWindowAgg(WindowAggState *node);`
Support window functions a la SQL:2008. Hitoshi Harada, with some kibitzing from Heikki and Tom. 2008-12-28 19:54:01 +01:00
			`#endif /* NODEWINDOWAGG_H */`