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postgresql/src/include/executor/nodeSubqueryscan.h

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Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias. (Don't forget that an alias is required.) Views reimplemented as expanding to subselect-in-FROM. Grouping, aggregates, DISTINCT in views actually work now (he says optimistically). No UNION support in subselects/views yet, but I have some ideas about that. Rule-related permissions checking moved out of rewriter and into executor. INITDB REQUIRED!
2000-09-29 14:21:41 -04:00
/*-------------------------------------------------------------------------
*
* nodeSubqueryscan.h
*
*
*
Update copyrights to 2003.
2003-08-03 22:40:20 -04:00
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias. (Don't forget that an alias is required.) Views reimplemented as expanding to subselect-in-FROM. Grouping, aggregates, DISTINCT in views actually work now (he says optimistically). No UNION support in subselects/views yet, but I have some ideas about that. Rule-related permissions checking moved out of rewriter and into executor. INITDB REQUIRED!
2000-09-29 14:21:41 -04:00
* Portions Copyright (c) 1994, Regents of the University of California
*
make sure the $Id tags are converted to $PostgreSQL as well ...
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* $PostgreSQL: pgsql/src/include/executor/nodeSubqueryscan.h,v 1.9 2003/11/29 22:41:01 pgsql Exp $
Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias. (Don't forget that an alias is required.) Views reimplemented as expanding to subselect-in-FROM. Grouping, aggregates, DISTINCT in views actually work now (he says optimistically). No UNION support in subselects/views yet, but I have some ideas about that. Rule-related permissions checking moved out of rewriter and into executor. INITDB REQUIRED!
2000-09-29 14:21:41 -04:00
*
*-------------------------------------------------------------------------
*/
#ifndef NODESUBQUERYSCAN_H
#define NODESUBQUERYSCAN_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 10:50:39 -05:00
#include "nodes/execnodes.h"
Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias. (Don't forget that an alias is required.) Views reimplemented as expanding to subselect-in-FROM. Grouping, aggregates, DISTINCT in views actually work now (he says optimistically). No UNION support in subselects/views yet, but I have some ideas about that. Rule-related permissions checking moved out of rewriter and into executor. INITDB REQUIRED!
2000-09-29 14:21:41 -04:00
extern int ExecCountSlotsSubqueryScan(SubqueryScan *node);
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 10:50:39 -05:00
extern SubqueryScanState *ExecInitSubqueryScan(SubqueryScan *node, EState *estate);
extern TupleTableSlot *ExecSubqueryScan(SubqueryScanState *node);
extern void ExecEndSubqueryScan(SubqueryScanState *node);
extern void ExecSubqueryReScan(SubqueryScanState *node, ExprContext *exprCtxt);
Another pgindent run. Fixes enum indenting, and improves #endif spacing. Also adds space for one-line comments.
2001-10-28 01:26:15 -05:00
New pgindent run with fixes suggested by Tom. Patch manually reviewed, initdb/regression tests pass.
2001-11-05 12:46:40 -05:00
#endif /* NODESUBQUERYSCAN_H */
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