diff options
| -rw-r--r-- | src/backend/catalog/pg_subscription.c | 4 | ||||
| -rw-r--r-- | src/backend/commands/subscriptioncmds.c | 3 |
2 files changed, 7 insertions, 0 deletions
diff --git a/src/backend/catalog/pg_subscription.c b/src/backend/catalog/pg_subscription.c index c69c461b62a..fb53d71cd66 100644 --- a/src/backend/catalog/pg_subscription.c +++ b/src/backend/catalog/pg_subscription.c @@ -28,6 +28,8 @@ #include "nodes/makefuncs.h" +#include "storage/lmgr.h" + #include "utils/array.h" #include "utils/builtins.h" #include "utils/fmgroids.h" @@ -246,6 +248,8 @@ SetSubscriptionRelState(Oid subid, Oid relid, char state, bool nulls[Natts_pg_subscription_rel]; Datum values[Natts_pg_subscription_rel]; + LockSharedObject(SubscriptionRelationId, subid, 0, AccessShareLock); + rel = heap_open(SubscriptionRelRelationId, RowExclusiveLock); /* Try finding existing mapping. */ diff --git a/src/backend/commands/subscriptioncmds.c b/src/backend/commands/subscriptioncmds.c index 9cbd36f6463..6dc3f6ee000 100644 --- a/src/backend/commands/subscriptioncmds.c +++ b/src/backend/commands/subscriptioncmds.c @@ -644,6 +644,9 @@ AlterSubscription(AlterSubscriptionStmt *stmt) subid = HeapTupleGetOid(tup); sub = GetSubscription(subid, false); + /* Lock the subscription so nobody else can do anything with it. */ + LockSharedObject(SubscriptionRelationId, subid, 0, AccessExclusiveLock); + /* Form a new tuple. */ memset(values, 0, sizeof(values)); memset(nulls, false, sizeof(nulls)); |