diff options
Diffstat (limited to 'src/include/utils/portal.h')
| -rw-r--r-- | src/include/utils/portal.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/include/utils/portal.h b/src/include/utils/portal.h index 3c17b039cc9..2e5bbdd0ec4 100644 --- a/src/include/utils/portal.h +++ b/src/include/utils/portal.h @@ -161,6 +161,14 @@ typedef struct PortalData int16 *formats; /* a format code for each column */ /* + * Outermost ActiveSnapshot for execution of the portal's queries. For + * all but a few utility commands, we require such a snapshot to exist. + * This ensures that TOAST references in query results can be detoasted, + * and helps to reduce thrashing of the process's exposed xmin. + */ + Snapshot portalSnapshot; /* active snapshot, or NULL if none */ + + /* * Where we store tuples for a held cursor or a PORTAL_ONE_RETURNING or * PORTAL_UTIL_SELECT query. (A cursor held past the end of its * transaction no longer has any active executor state.) @@ -237,5 +245,6 @@ extern void PortalCreateHoldStore(Portal portal); extern void PortalHashTableDeleteAll(void); extern bool ThereAreNoReadyPortals(void); extern void HoldPinnedPortals(void); +extern void ForgetPortalSnapshots(void); #endif /* PORTAL_H */ |