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Modify processing of DECLARE CURSOR and EXPLAIN so that they can resolve the

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types of unspecified parameters when submitted via extended query protocol.
This worked in 8.2 but I had broken it during plancache changes.  DECLARE
CURSOR is now treated almost exactly like a plain SELECT through parse
analysis, rewrite, and planning; only just before sending to the executor
do we divert it away to ProcessUtility.  This requires a special-case check
in a number of places, but practically all of them were already special-casing
SELECT INTO, so it's not too ugly.  (Maybe it would be a good idea to merge
the two by treating IntoClause as a form of utility statement?  Not going to
worry about that now, though.)  That approach doesn't work for EXPLAIN,
however, so for that I punted and used a klugy solution of running parse
analysis an extra time if under extended query protocol.
This commit is contained in:
Tom Lane
2007-04-27 22:05:49 +00:00
parent a264671116
commit bbbe825f5f
26 changed files with 333 additions and 246 deletions
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9
src/backend/nodes/copyfuncs.c
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@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.374 2007/04/26 16:13:10 neilc Exp $
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.375 2007/04/27 22:05:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -77,7 +77,8 @@ _copyPlannedStmt(PlannedStmt *from)
COPY_NODE_FIELD(planTree);
COPY_NODE_FIELD(rtable);
COPY_NODE_FIELD(resultRelations);
COPY_NODE_FIELD(into);
COPY_NODE_FIELD(utilityStmt);
COPY_NODE_FIELD(intoClause);
COPY_NODE_FIELD(subplans);
COPY_BITMAPSET_FIELD(rewindPlanIDs);
COPY_NODE_FIELD(returningLists);
@ -1819,7 +1820,7 @@ _copyQuery(Query *from)
COPY_SCALAR_FIELD(canSetTag);
COPY_NODE_FIELD(utilityStmt);
COPY_SCALAR_FIELD(resultRelation);
COPY_NODE_FIELD(into);
COPY_NODE_FIELD(intoClause);
COPY_SCALAR_FIELD(hasAggs);
COPY_SCALAR_FIELD(hasSubLinks);
COPY_NODE_FIELD(rtable);
@ -1884,7 +1885,7 @@ _copySelectStmt(SelectStmt *from)
SelectStmt *newnode = makeNode(SelectStmt);
COPY_NODE_FIELD(distinctClause);
COPY_NODE_FIELD(into);
COPY_NODE_FIELD(intoClause);
COPY_NODE_FIELD(targetList);
COPY_NODE_FIELD(fromClause);
COPY_NODE_FIELD(whereClause);