postgresql/src/include/executor/nodeAgg.h

/*-------------------------------------------------------------------------
 *
 * nodeAgg.h
 *	  prototypes for nodeAgg.c
 *
 *
 * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * $PostgreSQL: pgsql/src/include/executor/nodeAgg.h,v 1.31 2009/09/27 21:10:53 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef NODEAGG_H
#define NODEAGG_H

#include "nodes/execnodes.h"

extern AggState *ExecInitAgg(Agg *node, EState *estate, int eflags);
extern TupleTableSlot *ExecAgg(AggState *node);
extern void ExecEndAgg(AggState *node);
extern void ExecReScanAgg(AggState *node, ExprContext *exprCtxt);

extern Size hash_agg_entry_size(int numAggs);

extern Datum aggregate_dummy(PG_FUNCTION_ARGS);

#endif   /* NODEAGG_H */
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00			`/*-------------------------------------------------------------------------`
			`*`
Change my-function-name-- to my_function_name, and optimizer renames. 1999-02-14 00:22:53 +01:00			`* nodeAgg.h`
Create a new file executor/execGrouping.c to centralize utility routines shared by nodeGroup, nodeAgg, and soon nodeSubplan. 2003-01-11 00:54:24 +01:00			`* prototypes for nodeAgg.c`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00			`*`
			`*`
Update copyright for 2009. 2009-01-01 18:24:05 +01:00			`* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group`
Add: * Portions Copyright (c) 1996-2000, PostgreSQL, Inc to all files copyright Regents of Berkeley. Man, that's a lot of files. 2000-01-26 06:58:53 +01:00			`* Portions Copyright (c) 1994, Regents of the University of California`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00			`*`
Remove no-longer-needed ExecCountSlots infrastructure. 2009-09-27 23:10:53 +02:00			`* $PostgreSQL: pgsql/src/include/executor/nodeAgg.h,v 1.31 2009/09/27 21:10:53 tgl Exp $`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00			`*`
			`*-------------------------------------------------------------------------`
			`*/`
Massive commit to run PGINDENT on all .c and .h files. 1997-09-07 07:04:48 +02:00			`#ifndef NODEAGG_H`
			`#define NODEAGG_H`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00
Phase 1 of read-only-plans project: cause executor state nodes to point to plan nodes, not vice-versa. All executor state nodes now inherit from struct PlanState. Copying of plan trees has been simplified by not storing a list of SubPlans in Plan nodes (eliminating duplicate links). The executor still needs such a list, but it can build it during ExecutorStart since it has to scan the plan tree anyway. No initdb forced since no stored-on-disk structures changed, but you will need a full recompile because of node-numbering changes. 2002-12-05 16:50:39 +01:00			`#include "nodes/execnodes.h"`
Cleanup up include files. 1997-11-26 02:14:33 +01:00
Extend the ExecInitNode API so that plan nodes receive a set of flag bits indicating which optional capabilities can actually be exercised at runtime. This will allow Sort and Material nodes, and perhaps later other nodes, to avoid unnecessary overhead in common cases. This commit just adds the infrastructure and arranges to pass the correct flag values down to plan nodes; none of the actual optimizations are here yet. I'm committing this separately in case anyone wants to measure the added overhead. (It should be negligible.) Simon Riggs and Tom Lane 2006-02-28 05:10:28 +01:00			`extern AggState ExecInitAgg(Agg node, EState *estate, int eflags);`
Phase 1 of read-only-plans project: cause executor state nodes to point to plan nodes, not vice-versa. All executor state nodes now inherit from struct PlanState. Copying of plan trees has been simplified by not storing a list of SubPlans in Plan nodes (eliminating duplicate links). The executor still needs such a list, but it can build it during ExecutorStart since it has to scan the plan tree anyway. No initdb forced since no stored-on-disk structures changed, but you will need a full recompile because of node-numbering changes. 2002-12-05 16:50:39 +01:00			`extern TupleTableSlot ExecAgg(AggState node);`
			`extern void ExecEndAgg(AggState *node);`
			`extern void ExecReScanAgg(AggState node, ExprContext exprCtxt);`
Another pgindent run. Fixes enum indenting, and improves #endif spacing. Also adds space for one-line comments. 2001-10-28 07:26:15 +01:00
Improve planner's estimation of the space needed for HashAgg plans: look at the actual aggregate transition datatypes and the actual overhead needed by nodeAgg.c, instead of using pessimistic round numbers. Per a discussion with Michael Tiemann. 2005-01-28 20:34:28 +01:00			`extern Size hash_agg_entry_size(int numAggs);`

Restructure representation of aggregate functions so that they have pg_proc entries, per pghackers discussion. This fixes aggregates to live in namespaces, and also simplifies/speeds up lookup in parse_func.c. Also, add a 'proimplicit' flag to pg_proc that controls whether a type coercion function may be invoked implicitly, or only explicitly. The current settings of these flags are more permissive than I would like, but we will need to debate and refine the behavior; for now, I avoided breaking regression tests as much as I could. 2002-04-11 22:00:18 +02:00			`extern Datum aggregate_dummy(PG_FUNCTION_ARGS);`

New pgindent run with fixes suggested by Tom. Patch manually reviewed, initdb/regression tests pass. 2001-11-05 18:46:40 +01:00			`#endif /* NODEAGG_H */`