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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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17
src/backend/rewrite/rewriteSupport.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteSupport.c,v 1.43 2000/06/30 07:04:23 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteSupport.c,v 1.44 2000/09/29 18:21:24 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -34,10 +34,11 @@ IsDefinedRewriteRule(char *ruleName)
}
/*
* setRelhasrulesInRelation
* Set the value of the relation's relhasrules field in pg_class.
* SetRelationRuleStatus
* Set the value of the relation's relhasrules field in pg_class;
* if the relation is becoming a view, also adjust its relkind.
*
* NOTE: caller should be holding an appropriate lock on the relation.
* NOTE: caller must be holding an appropriate lock on the relation.
*
* NOTE: an important side-effect of this operation is that an SI invalidation
* message is sent out to all backends --- including me --- causing relcache
@ -47,7 +48,8 @@ IsDefinedRewriteRule(char *ruleName)
* an SI message in that case.
*/
void
setRelhasrulesInRelation(Oid relationId, bool relhasrules)
SetRelationRuleStatus(Oid relationId, bool relHasRules,
bool relIsBecomingView)
{
Relation relationRelation;
HeapTuple tuple;
@ -63,7 +65,10 @@ setRelhasrulesInRelation(Oid relationId, bool relhasrules)
Assert(HeapTupleIsValid(tuple));
/* Do the update */
((Form_pg_class) GETSTRUCT(tuple))->relhasrules = relhasrules;
((Form_pg_class) GETSTRUCT(tuple))->relhasrules = relHasRules;
if (relIsBecomingView)
((Form_pg_class) GETSTRUCT(tuple))->relkind = RELKIND_VIEW;
heap_update(relationRelation, &tuple->t_self, tuple, NULL);
/* Keep the catalog indices up to date */