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Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias.

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(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!
This commit is contained in:
Tom Lane
2000-09-29 18:21:41 +00:00
parent 6f64c2e54a
commit 3a94e789f5
77 changed files with 3176 additions and 2661 deletions
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20
src/include/nodes/execnodes.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: execnodes.h,v 1.49 2000/09/12 21:07:10 tgl Exp $
* $Id: execnodes.h,v 1.50 2000/09/29 18:21:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -453,6 +453,24 @@ typedef struct TidScanState
HeapTupleData tss_htup;
} TidScanState;
/* ----------------
* SubqueryScanState information
*
* SubqueryScanState is used for scanning a sub-query in the range table.
* The sub-query will have its own EState, which we save here.
* ScanTupleSlot references the current output tuple of the sub-query.
*
* SubQueryDesc queryDesc for sub-query
* SubEState exec state for sub-query
* ----------------
*/
typedef struct SubqueryScanState
{
CommonScanState csstate; /* its first field is NodeTag */
struct QueryDesc *sss_SubQueryDesc;
EState *sss_SubEState;
} SubqueryScanState;
/* ----------------------------------------------------------------
* Join State Information
* ----------------------------------------------------------------