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-rw-r--r--src/backend/commands/tablecmds.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 788544ec928..93f13a4778c 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -3692,6 +3692,9 @@ AlterTableGetLockLevel(List *cmds)
break;
case AT_AttachPartition:
+ cmd_lockmode = ShareUpdateExclusiveLock;
+ break;
+
case AT_DetachPartition:
cmd_lockmode = AccessExclusiveLock;
break;