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Remove LockMetadataSnapshot

pull/1407/head
Marco Slot 2017-07-18 17:18:25 +02:00
parent ad0fdf57ca
commit 3a0571e69b
2 changed files with 0 additions and 16 deletions
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15
src/backend/distributed/utils/resource_lock.c
View File

@ -316,18 +316,3 @@ LockRelationShardResources(List *relationShardList, LOCKMODE lockMode)
} }
} }
} }
/*
* LockMetadataSnapshot acquires a lock needed to serialize changes to pg_dist_node
* and all other metadata changes. Operations that modify pg_dist_node should acquire
* AccessExclusiveLock. All other metadata changes should acquire AccessShareLock. Any locks
* acquired using this method are released at transaction end.
*/
void
LockMetadataSnapshot(LOCKMODE lockMode)
{
Assert(lockMode == AccessExclusiveLock || lockMode == AccessShareLock);
(void) LockRelationOid(DistNodeRelationId(), lockMode);
}

1
src/include/distributed/resource_lock.h
View File

@ -80,6 +80,5 @@ extern void LockShardListMetadata(List *shardIntervalList, LOCKMODE lockMode);
extern void LockShardListResources(List *shardIntervalList, LOCKMODE lockMode); extern void LockShardListResources(List *shardIntervalList, LOCKMODE lockMode);
extern void LockRelationShardResources(List *relationShardList, LOCKMODE lockMode); extern void LockRelationShardResources(List *relationShardList, LOCKMODE lockMode);
extern void LockMetadataSnapshot(LOCKMODE lockMode);
#endif /* RESOURCE_LOCK_H */ #endif /* RESOURCE_LOCK_H */