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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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4
src/backend/nodes/readfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.205 2007/03/27 23:21:09 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.206 2007/04/27 22:05:47 tgl Exp $
*
* NOTES
* Path and Plan nodes do not have any readfuncs support, because we
@ -139,7 +139,7 @@ _readQuery(void)
READ_BOOL_FIELD(canSetTag);
READ_NODE_FIELD(utilityStmt);
READ_INT_FIELD(resultRelation);
READ_NODE_FIELD(into);
READ_NODE_FIELD(intoClause);
READ_BOOL_FIELD(hasAggs);
READ_BOOL_FIELD(hasSubLinks);
READ_NODE_FIELD(rtable);