diff options
Diffstat (limited to 'src/backend/access/transam/multixact.c')
| -rw-r--r-- | src/backend/access/transam/multixact.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/backend/access/transam/multixact.c b/src/backend/access/transam/multixact.c index 6ccdc5b58cb..43653fe5721 100644 --- a/src/backend/access/transam/multixact.c +++ b/src/backend/access/transam/multixact.c @@ -736,6 +736,25 @@ ReadNextMultiXactId(void) } /* + * ReadMultiXactIdRange + * Get the range of IDs that may still be referenced by a relation. + */ +void +ReadMultiXactIdRange(MultiXactId *oldest, MultiXactId *next) +{ + LWLockAcquire(MultiXactGenLock, LW_SHARED); + *oldest = MultiXactState->oldestMultiXactId; + *next = MultiXactState->nextMXact; + LWLockRelease(MultiXactGenLock); + + if (*oldest < FirstMultiXactId) + *oldest = FirstMultiXactId; + if (*next < FirstMultiXactId) + *next = FirstMultiXactId; +} + + +/* * MultiXactIdCreateFromMembers * Make a new MultiXactId from the specified set of members * |