From 3a94e789f5c9537d804210be3cb26f7fb08e3b9e Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Fri, 29 Sep 2000 18:21:41 +0000 Subject: 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! --- src/include/executor/nodeSubqueryscan.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 src/include/executor/nodeSubqueryscan.h (limited to 'src/include/executor/nodeSubqueryscan.h') diff --git a/src/include/executor/nodeSubqueryscan.h b/src/include/executor/nodeSubqueryscan.h new file mode 100644 index 00000000000..c582384b8c3 --- /dev/null +++ b/src/include/executor/nodeSubqueryscan.h @@ -0,0 +1,25 @@ +/*------------------------------------------------------------------------- + * + * nodeSubqueryscan.h + * + * + * + * Portions Copyright (c) 1996-2000, PostgreSQL, Inc + * Portions Copyright (c) 1994, Regents of the University of California + * + * $Id: nodeSubqueryscan.h,v 1.1 2000/09/29 18:21:38 tgl Exp $ + * + *------------------------------------------------------------------------- + */ +#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 */ -- cgit v1.2.3