postgresql/src/include/executor/nodeSubplan.h

/*-------------------------------------------------------------------------
 *
 * nodeSubplan.h
 *
 *
 *
 * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * $PostgreSQL: pgsql/src/include/executor/nodeSubplan.h,v 1.27 2008/01/01 19:45:57 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef NODESUBPLAN_H
#define NODESUBPLAN_H

#include "nodes/execnodes.h"

extern SubPlanState *ExecInitSubPlan(SubPlan *subplan, PlanState *parent);
extern Datum ExecSubPlan(SubPlanState *node,
			ExprContext *econtext,
			bool *isNull,
			ExprDoneCond *isDone);

extern void ExecReScanSetParamPlan(SubPlanState *node, PlanState *parent);

extern void ExecSetParamPlan(SubPlanState *node, ExprContext *econtext);

#endif   /* NODESUBPLAN_H */
Subselects... 1998-02-13 04:46:56 +01:00			`/*-------------------------------------------------------------------------`
			`*`
Change my-function-name-- to my_function_name, and optimizer renames. 1999-02-14 00:22:53 +01:00			`* nodeSubplan.h`
Subselects... 1998-02-13 04:46:56 +01:00			`*`
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			`*`
			`*`
Update copyrights in source tree to 2008. 2008-01-01 20:46:01 +01:00			`* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group`
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			`* Portions Copyright (c) 1994, Regents of the University of California`
			`*`
Update copyrights in source tree to 2008. 2008-01-01 20:46:01 +01:00			`* $PostgreSQL: pgsql/src/include/executor/nodeSubplan.h,v 1.27 2008/01/01 19:45:57 momjian Exp $`
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			`*`
Subselects... 1998-02-13 04:46:56 +01:00			`*-------------------------------------------------------------------------`
			`*/`
			`#ifndef NODESUBPLAN_H`
			`#define NODESUBPLAN_H`

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"`
Subselects... 1998-02-13 04:46:56 +01:00
Get rid of the separate EState for subplans, and just let them share the parent query's EState. Now that there's a single flat rangetable for both the main plan and subplans, there's no need anymore for a separate EState, and removing it allows cleaning up some crufty code in nodeSubplan.c and nodeSubqueryscan.c. Should be a tad faster too, although any difference will probably be hard to measure. This is the last bit of subsidiary mop-up work from changing to a flat rangetable. 2007-02-27 02:11:26 +01:00			`extern SubPlanState ExecInitSubPlan(SubPlan subplan, PlanState *parent);`
Another pgindent run with updated typedefs. 2003-08-08 23:42:59 +02:00			`extern Datum ExecSubPlan(SubPlanState *node,`
pgindent run. 2003-08-04 02:43:34 +02:00			`ExprContext *econtext,`
Replace the switching function ExecEvalExpr() with a macro that jumps directly to the appropriate per-node execution function, using a function pointer stored by ExecInitExpr. This speeds things up by eliminating one level of function call. The function-pointer technique also enables further small improvements such as only making one-time tests once (and then changing the function pointer). Overall this seems to gain about 10% on evaluation of simple expressions, which isn't earthshaking but seems a worthwhile gain for a relatively small hack. Per recent discussion on pghackers. 2004-03-17 02:02:24 +01:00			`bool *isNull,`
			`ExprDoneCond *isDone);`
Get rid of the separate EState for subplans, and just let them share the parent query's EState. Now that there's a single flat rangetable for both the main plan and subplans, there's no need anymore for a separate EState, and removing it allows cleaning up some crufty code in nodeSubplan.c and nodeSubqueryscan.c. Should be a tad faster too, although any difference will probably be hard to measure. This is the last bit of subsidiary mop-up work from changing to a flat rangetable. 2007-02-27 02:11:26 +01:00
Another pgindent run with updated typedefs. 2003-08-08 23:42:59 +02:00			`extern void ExecReScanSetParamPlan(SubPlanState node, PlanState parent);`
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
Another pgindent run with updated typedefs. 2003-08-08 23:42:59 +02:00			`extern void ExecSetParamPlan(SubPlanState node, ExprContext econtext);`
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
New pgindent run with fixes suggested by Tom. Patch manually reviewed, initdb/regression tests pass. 2001-11-05 18:46:40 +01:00			`#endif /* NODESUBPLAN_H */`