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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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6
src/backend/nodes/equalfuncs.c
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@@ -18,7 +18,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.305 2007/04/26 16:13:11 neilc Exp $
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.306 2007/04/27 22:05:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -722,7 +722,7 @@ _equalQuery(Query *a, Query *b)
COMPARE_SCALAR_FIELD(canSetTag);
COMPARE_NODE_FIELD(utilityStmt);
COMPARE_SCALAR_FIELD(resultRelation);
COMPARE_NODE_FIELD(into);
COMPARE_NODE_FIELD(intoClause);
COMPARE_SCALAR_FIELD(hasAggs);
COMPARE_SCALAR_FIELD(hasSubLinks);
COMPARE_NODE_FIELD(rtable);
@@ -779,7 +779,7 @@ static bool
_equalSelectStmt(SelectStmt *a, SelectStmt *b)
{
COMPARE_NODE_FIELD(distinctClause);
COMPARE_NODE_FIELD(into);
COMPARE_NODE_FIELD(intoClause);
COMPARE_NODE_FIELD(targetList);
COMPARE_NODE_FIELD(fromClause);
COMPARE_NODE_FIELD(whereClause);