diff options
Diffstat (limited to 'src/backend/utils/mmgr/portalmem.c')
| -rw-r--r-- | src/backend/utils/mmgr/portalmem.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/src/backend/utils/mmgr/portalmem.c b/src/backend/utils/mmgr/portalmem.c index 520a55d64ae..654247dd8c5 100644 --- a/src/backend/utils/mmgr/portalmem.c +++ b/src/backend/utils/mmgr/portalmem.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/utils/mmgr/portalmem.c,v 1.51 2002/12/30 22:10:54 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/utils/mmgr/portalmem.c,v 1.52 2003/03/10 03:53:51 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -33,16 +33,25 @@ #include "postgres.h" +#include "executor/executor.h" #include "utils/hsearch.h" #include "utils/memutils.h" #include "utils/portal.h" + +/* + * estimate of the maximum number of open portals a user would have, + * used in initially sizing the PortalHashTable in EnablePortalManager() + */ +#define PORTALS_PER_USER 64 + + /* ---------------- * Global state * ---------------- */ -#define MAX_PORTALNAME_LEN 64 +#define MAX_PORTALNAME_LEN NAMEDATALEN typedef struct portalhashent { @@ -158,7 +167,8 @@ PortalSetQuery(Portal portal, AssertArg(PortalIsValid(portal)); portal->queryDesc = queryDesc; - portal->atStart = true; /* Allow fetch forward only */ + portal->backwardOK = ExecSupportsBackwardScan(queryDesc->plantree); + portal->atStart = true; /* Allow fetch forward only, to start */ portal->atEnd = false; portal->cleanup = cleanup; } @@ -201,6 +211,7 @@ CreatePortal(const char *name) /* initialize portal query */ portal->queryDesc = NULL; + portal->backwardOK = false; portal->atStart = true; /* disallow fetches until query is set */ portal->atEnd = true; portal->cleanup = NULL; |