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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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10
src/backend/optimizer/plan/planner.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planner.c,v 1.217 2007/04/16 01:14:56 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planner.c,v 1.218 2007/04/27 22:05:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -90,6 +90,11 @@ planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
ListCell *lp,
*lr;
/* Cursor options may come from caller or from DECLARE CURSOR stmt */
if (parse->utilityStmt &&
IsA(parse->utilityStmt, DeclareCursorStmt))
cursorOptions |= ((DeclareCursorStmt *) parse->utilityStmt)->options;
/*
* Set up global state for this planner invocation. This data is needed
* across all levels of sub-Query that might exist in the given command,
@ -156,7 +161,8 @@ planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
result->planTree = top_plan;
result->rtable = glob->finalrtable;
result->resultRelations = root->resultRelations;
result->into = parse->into;
result->utilityStmt = parse->utilityStmt;
result->intoClause = parse->intoClause;
result->subplans = glob->subplans;
result->rewindPlanIDs = glob->rewindPlanIDs;
result->returningLists = root->returningLists;