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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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12
src/backend/optimizer/path/joinpath.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinpath.c,v 1.56 2000/09/12 21:06:53 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinpath.c,v 1.57 2000/09/29 18:21:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -643,10 +643,10 @@ hash_inner_and_outer(Query *root,
continue; /* not hashjoinable */
/*
* If processing an outer join, only use explicit join clauses for
* If processing an outer join, only use its own join clauses for
* hashing. For inner joins we need not be so picky.
*/
if (isouterjoin && !restrictinfo->isjoinqual)
if (isouterjoin && restrictinfo->ispusheddown)
continue;
clause = restrictinfo->clause;
@ -665,7 +665,7 @@ hash_inner_and_outer(Query *root,
continue; /* no good for these input relations */
/* always a one-element list of hash clauses */
hashclauses = lcons(restrictinfo, NIL);
hashclauses = makeList1(restrictinfo);
/* estimate disbursion of inner var for costing purposes */
innerdisbursion = estimate_disbursion(root, inner);
@ -820,7 +820,7 @@ select_mergejoin_clauses(RelOptInfo *joinrel,
*right;
/*
* If processing an outer join, only use explicit join clauses in the
* If processing an outer join, only use its own join clauses in the
* merge. For inner joins we need not be so picky.
*
* Furthermore, if it is a right/full join then *all* the explicit
@ -832,7 +832,7 @@ select_mergejoin_clauses(RelOptInfo *joinrel,
*/
if (isouterjoin)
{
if (!restrictinfo->isjoinqual)
if (restrictinfo->ispusheddown)
continue;
switch (jointype)
{