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-rw-r--r--src/backend/optimizer/prep/prepunion.c10
-rw-r--r--src/backend/parser/analyze.c18
-rw-r--r--src/backend/rewrite/rewriteHandler.c21
-rw-r--r--src/backend/rewrite/rewriteManip.c22
4 files changed, 64 insertions, 7 deletions
diff --git a/src/backend/optimizer/prep/prepunion.c b/src/backend/optimizer/prep/prepunion.c
index 03674e8990f..d14c3c98e1f 100644
--- a/src/backend/optimizer/prep/prepunion.c
+++ b/src/backend/optimizer/prep/prepunion.c
@@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.97 2003/06/29 23:05:04 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.98 2003/07/16 17:25:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -85,6 +85,14 @@ plan_set_operations(Query *parse)
Assert(topop && IsA(topop, SetOperationStmt));
+ /* check for unsupported stuff */
+ Assert(parse->utilityStmt == NULL);
+ Assert(parse->jointree->fromlist == NIL);
+ Assert(parse->jointree->quals == NULL);
+ Assert(parse->groupClause == NIL);
+ Assert(parse->havingQual == NULL);
+ Assert(parse->distinctClause == NIL);
+
/*
* Find the leftmost component Query. We need to use its column names
* for all generated tlists (else SELECT INTO won't work right).
diff --git a/src/backend/parser/analyze.c b/src/backend/parser/analyze.c
index 90818b153b8..ca7759cfc82 100644
--- a/src/backend/parser/analyze.c
+++ b/src/backend/parser/analyze.c
@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.278 2003/07/03 19:07:30 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.279 2003/07/16 17:25:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1788,6 +1788,15 @@ transformRuleStmt(ParseState *pstate, RuleStmt *stmt,
sub_qry = getInsertSelectQuery(top_subqry, NULL);
/*
+ * If the sub_qry is a setop, we cannot attach any qualifications
+ * to it, because the planner won't notice them. This could
+ * perhaps be relaxed someday, but for now, we may as well reject
+ * such a rule immediately.
+ */
+ if (sub_qry->setOperations != NULL && stmt->whereClause != NULL)
+ elog(ERROR, "Conditional UNION/INTERSECT/EXCEPT statements are not implemented");
+
+ /*
* Validate action's use of OLD/NEW, qual too
*/
has_old =
@@ -1841,6 +1850,13 @@ transformRuleStmt(ParseState *pstate, RuleStmt *stmt,
*/
if (has_old || (has_new && stmt->event == CMD_UPDATE))
{
+ /*
+ * If sub_qry is a setop, manipulating its jointree will do
+ * no good at all, because the jointree is dummy. (This
+ * should be a can't-happen case because of prior tests.)
+ */
+ if (sub_qry->setOperations != NULL)
+ elog(ERROR, "Conditional UNION/INTERSECT/EXCEPT statements are not implemented");
/* hack so we can use addRTEtoQuery() */
sub_pstate->p_rtable = sub_qry->rtable;
sub_pstate->p_joinlist = sub_qry->jointree->fromlist;
diff --git a/src/backend/rewrite/rewriteHandler.c b/src/backend/rewrite/rewriteHandler.c
index a1d9122f828..7ee28291e0d 100644
--- a/src/backend/rewrite/rewriteHandler.c
+++ b/src/backend/rewrite/rewriteHandler.c
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.122 2003/07/03 16:34:25 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.123 2003/07/16 17:25:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -148,18 +148,31 @@ rewriteRuleAction(Query *parsetree,
* As above, the action's jointree must not share substructure with the
* main parsetree's.
*/
- if (sub_action->jointree != NULL)
+ if (sub_action->commandType != CMD_UTILITY)
{
bool keeporig;
List *newjointree;
+ Assert(sub_action->jointree != NULL);
keeporig = (!rangeTableEntry_used((Node *) sub_action->jointree,
rt_index, 0)) &&
(rangeTableEntry_used(rule_qual, rt_index, 0) ||
rangeTableEntry_used(parsetree->jointree->quals, rt_index, 0));
newjointree = adjustJoinTreeList(parsetree, !keeporig, rt_index);
- sub_action->jointree->fromlist =
- nconc(newjointree, sub_action->jointree->fromlist);
+ if (newjointree != NIL)
+ {
+ /*
+ * If sub_action is a setop, manipulating its jointree will do
+ * no good at all, because the jointree is dummy. (Perhaps
+ * someday we could push the joining and quals down to the
+ * member statements of the setop?)
+ */
+ if (sub_action->setOperations != NULL)
+ elog(ERROR, "Conditional UNION/INTERSECT/EXCEPT statements are not implemented");
+
+ sub_action->jointree->fromlist =
+ nconc(newjointree, sub_action->jointree->fromlist);
+ }
}
/*
diff --git a/src/backend/rewrite/rewriteManip.c b/src/backend/rewrite/rewriteManip.c
index 0d3dbe7d6e6..1cd42a44f76 100644
--- a/src/backend/rewrite/rewriteManip.c
+++ b/src/backend/rewrite/rewriteManip.c
@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteManip.c,v 1.72 2003/06/06 15:04:02 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteManip.c,v 1.73 2003/07/16 17:25:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -733,6 +733,16 @@ AddQual(Query *parsetree, Node *qual)
elog(ERROR, "Conditional utility statements are not implemented");
}
+ if (parsetree->setOperations != NULL)
+ {
+ /*
+ * There's noplace to put the qual on a setop statement, either.
+ * (This could be fixed, but right now the planner simply ignores
+ * any qual condition on a setop query.)
+ */
+ elog(ERROR, "Conditional UNION/INTERSECT/EXCEPT statements are not implemented");
+ }
+
/* INTERSECT want's the original, but we need to copy - Jan */
copy = copyObject(qual);
@@ -773,6 +783,16 @@ AddHavingQual(Query *parsetree, Node *havingQual)
elog(ERROR, "Conditional utility statements are not implemented");
}
+ if (parsetree->setOperations != NULL)
+ {
+ /*
+ * There's noplace to put the qual on a setop statement, either.
+ * (This could be fixed, but right now the planner simply ignores
+ * any qual condition on a setop query.)
+ */
+ elog(ERROR, "Conditional UNION/INTERSECT/EXCEPT statements are not implemented");
+ }
+
/* INTERSECT want's the original, but we need to copy - Jan */
copy = copyObject(havingQual);
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-28 16:35:39 +0000