[HACKERS] unsafe tuple releasing in get_default_partition_oid

Sat, 28 Oct 2017 01:04:15 -0700 

Hi,

I just noticed that get_default_partition_oid() tries to release the
tuple even if it isn't valid.
Trivial patch attached.

diff --git a/src/backend/catalog/partition.c b/src/backend/catalog/partition.c
index 07fdf66c38..66ec214e02 100644
--- a/src/backend/catalog/partition.c
+++ b/src/backend/catalog/partition.c
@@ -2831,9 +2831,9 @@ get_default_partition_oid(Oid parentId)
 
                part_table_form = (Form_pg_partitioned_table) GETSTRUCT(tuple);
                defaultPartId = part_table_form->partdefid;
+               ReleaseSysCache(tuple);
        }
 
-       ReleaseSysCache(tuple);
        return defaultPartId;
 }
 

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