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Fix portal management code to support non-default command completion tags for

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portals using PORTAL_UTIL_SELECT strategy.  This is currently significant only
for FETCH queries, which are supposed to include a count in the tag.  Seems
it's been broken since 7.4, but nobody noticed before Knut Lehre.
This commit is contained in:
Tom Lane 2007-02-18 19:49:49 +00:00
parent bcac5703ec
commit 59a5f8bb18
1 changed files with 32 additions and 11 deletions
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43
src/backend/tcop/pquery.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/tcop/pquery.c,v 1.73.2.1 2004/03/05 00:21:51 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/pquery.c,v 1.73.2.2 2007/02/18 19:49:49 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -23,6 +23,7 @@
#include "utils/memutils.h"
static void FillPortalStore(Portal portal);
static uint32 RunFromStore(Portal portal, ScanDirection direction, long count,
DestReceiver *dest);
static long PortalRunSelect(Portal portal, bool forward, long count,
@ -461,16 +462,7 @@ PortalRun(Portal portal, long count,
* storing its results in the portal's tuplestore.
*/
if (!portal->portalUtilReady)
{
DestReceiver *treceiver;
PortalCreateHoldStore(portal);
treceiver = CreateDestReceiver(Tuplestore, portal);
PortalRunUtility(portal, lfirst(portal->parseTrees),
treceiver, NULL);
(*treceiver->rDestroy) (treceiver);
portal->portalUtilReady = true;
}
FillPortalStore(portal);
/*
* Now fetch desired portion of results.
@ -662,6 +654,35 @@ PortalRunSelect(Portal portal,
return nprocessed;
}
/*
* FillPortalStore
* Run the query and load result tuples into the portal's tuple store.
*
* This is used for PORTAL_UTIL_SELECT cases only.
*/
static void
FillPortalStore(Portal portal)
{
DestReceiver *treceiver;
char completionTag[COMPLETION_TAG_BUFSIZE];
PortalCreateHoldStore(portal);
treceiver = CreateDestReceiver(Tuplestore, portal);
completionTag[0] = '\0';
PortalRunUtility(portal, lfirst(portal->parseTrees),
treceiver, completionTag);
/* Override default completion tag with actual command result */
if (completionTag[0] != '\0')
portal->commandTag = pstrdup(completionTag);
(*treceiver->rDestroy) (treceiver);
portal->portalUtilReady = true;
}
/*
* RunFromStore
* Fetch tuples from the portal's tuple store.