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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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46
src/backend/nodes/equalfuncs.c
View File

@@ -20,7 +20,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.73 2000/09/12 21:06:49 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.74 2000/09/29 18:21:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -311,6 +311,17 @@ _equalRangeTblRef(RangeTblRef *a, RangeTblRef *b)
return true;
}
static bool
_equalFromExpr(FromExpr *a, FromExpr *b)
{
if (!equal(a->fromlist, b->fromlist))
return false;
if (!equal(a->quals, b->quals))
return false;
return true;
}
static bool
_equalJoinExpr(JoinExpr *a, JoinExpr *b)
{
@@ -346,7 +357,7 @@ _equalRelOptInfo(RelOptInfo *a, RelOptInfo *b)
/*
* We treat RelOptInfos as equal if they refer to the same base rels
* joined in the same order. Is this sufficient?
* joined in the same order. Is this appropriate/sufficient?
*/
return equali(a->relids, b->relids);
}
@@ -495,7 +506,7 @@ _equalRestrictInfo(RestrictInfo *a, RestrictInfo *b)
{
if (!equal(a->clause, b->clause))
return false;
if (a->isjoinqual != b->isjoinqual)
if (a->ispusheddown != b->ispusheddown)
return false;
if (!equal(a->subclauseindices, b->subclauseindices))
return false;
@@ -601,9 +612,7 @@ _equalQuery(Query *a, Query *b)
return false;
if (!equal(a->targetList, b->targetList))
return false;
if (!equal(a->qual, b->qual))
return false;
if (!equal(a->rowMark, b->rowMark))
if (!equali(a->rowMarks, b->rowMarks))
return false;
if (!equal(a->distinctClause, b->distinctClause))
return false;
@@ -1651,6 +1660,8 @@ _equalRangeTblEntry(RangeTblEntry *a, RangeTblEntry *b)
return false;
if (a->relid != b->relid)
return false;
if (!equal(a->subquery, b->subquery))
return false;
if (!equal(a->alias, b->alias))
return false;
if (!equal(a->eref, b->eref))
@@ -1659,7 +1670,11 @@ _equalRangeTblEntry(RangeTblEntry *a, RangeTblEntry *b)
return false;
if (a->inFromCl != b->inFromCl)
return false;
if (a->skipAcl != b->skipAcl)
if (a->checkForRead != b->checkForRead)
return false;
if (a->checkForWrite != b->checkForWrite)
return false;
if (a->checkAsUser != b->checkAsUser)
return false;
return true;
@@ -1676,17 +1691,6 @@ _equalSortClause(SortClause *a, SortClause *b)
return true;
}
static bool
_equalRowMark(RowMark *a, RowMark *b)
{
if (a->rti != b->rti)
return false;
if (a->info != b->info)
return false;
return true;
}
static bool
_equalFkConstraint(FkConstraint *a, FkConstraint *b)
{
@@ -1835,6 +1839,9 @@ equal(void *a, void *b)
case T_RangeTblRef:
retval = _equalRangeTblRef(a, b);
break;
case T_FromExpr:
retval = _equalFromExpr(a, b);
break;
case T_JoinExpr:
retval = _equalJoinExpr(a, b);
break;
@@ -2140,9 +2147,6 @@ equal(void *a, void *b)
case T_CaseWhen:
retval = _equalCaseWhen(a, b);
break;
case T_RowMark:
retval = _equalRowMark(a, b);
break;
case T_FkConstraint:
retval = _equalFkConstraint(a, b);
break;