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postgres/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!
26 years ago
/*-------------------------------------------------------------------------
*
* nodeSubqueryscan.h
*
*
*
Change Copyright from PostgreSQL, Inc to PostgreSQL Global Development Group.
25 years ago
* Portions Copyright (c) 1996-2001, 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!
26 years ago
* Portions Copyright (c) 1994, Regents of the University of California
*
Change Copyright from PostgreSQL, Inc to PostgreSQL Global Development Group.
25 years ago
* $Id: nodeSubqueryscan.h,v 1.2 2001/01/24 19:43:23 momjian 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!
26 years ago
*
*-------------------------------------------------------------------------
*/
#ifndef NODESUBQUERYSCAN_H
#define NODESUBQUERYSCAN_H
#include "nodes/plannodes.h"
extern TupleTableSlot *ExecSubqueryScan(SubqueryScan *node);
extern void ExecEndSubqueryScan(SubqueryScan *node);
extern bool ExecInitSubqueryScan(SubqueryScan *node, EState *estate, Plan *parent);
extern int ExecCountSlotsSubqueryScan(SubqueryScan *node);
extern void ExecSubqueryReScan(SubqueryScan *node, ExprContext *exprCtxt, Plan *parent);
#endif /* NODESUBQUERYSCAN_H */