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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/executor/execMain.c
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@ -26,7 +26,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/execMain.c,v 1.292 2007/03/29 00:15:38 tgl Exp $
* $PostgreSQL: pgsql/src/backend/executor/execMain.c,v 1.293 2007/04/27 22:05:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -420,7 +420,7 @@ ExecCheckXactReadOnly(PlannedStmt *plannedstmt)
*
* XXX should we allow this if the destination is temp?
*/
if (plannedstmt->into != NULL)
if (plannedstmt->intoClause != NULL)
goto fail;
/* Fail if write permissions are requested on any non-temp table */
@ -522,10 +522,10 @@ InitPlan(QueryDesc *queryDesc, int eflags)
* correct tuple descriptors. (Other SELECT INTO stuff comes later.)
*/
estate->es_select_into = false;
if (operation == CMD_SELECT && plannedstmt->into != NULL)
if (operation == CMD_SELECT && plannedstmt->intoClause != NULL)
{
estate->es_select_into = true;
estate->es_into_oids = interpretOidsOption(plannedstmt->into->options);
estate->es_into_oids = interpretOidsOption(plannedstmt->intoClause->options);
}
/*
@ -2395,7 +2395,7 @@ typedef struct
static void
OpenIntoRel(QueryDesc *queryDesc)
{
IntoClause *into = queryDesc->plannedstmt->into;
IntoClause *into = queryDesc->plannedstmt->intoClause;
EState *estate = queryDesc->estate;
Relation intoRelationDesc;
char *intoName;