2 files changed, 43 insertions, 0 deletions
diff --git a/src/test/regress/expected/partition_merge.out b/src/test/regress/expected/partition_merge.out
index 373d32948ca..2e0bfdc705d 100644
--- a/src/test/regress/expected/partition_merge.out
+++ b/src/test/regress/expected/partition_merge.out
@@ -746,4 +746,29 @@ DROP TABLE t3;
 DROP TABLE t2;
 DROP TABLE t1;
 --
+-- Check the partition index name if the partition name is the same as one
+-- of the merged partitions.
+--
+CREATE TABLE t (i int, PRIMARY KEY(i)) PARTITION BY RANGE (i);
+CREATE TABLE tp_0_1 PARTITION OF t FOR VALUES FROM (0) TO (1);
+CREATE TABLE tp_1_2 PARTITION OF t FOR VALUES FROM (1) TO (2);
+CREATE INDEX tidx ON t(i);
+ALTER TABLE t MERGE PARTITIONS (tp_1_2, tp_0_1) INTO tp_1_2;
+-- Indexname values should be 'tp_1_2_pkey' and 'tp_1_2_i_idx'.
+-- Not-null constraint name should be 'tp_1_2_i_not_null'.
+\d+ tp_1_2
+                          Table "partitions_merge_schema.tp_1_2"
+ Column |  Type   | Collation | Nullable | Default | Storage | Stats target | Description 
+--------+---------+-----------+----------+---------+---------+--------------+-------------
+ i      | integer |           | not null |         | plain   |              | 
+Partition of: t FOR VALUES FROM (0) TO (2)
+Partition constraint: ((i IS NOT NULL) AND (i >= 0) AND (i < 2))
+Indexes:
+    "tp_1_2_pkey" PRIMARY KEY, btree (i)
+    "tp_1_2_i_idx" btree (i)
+Not-null constraints:
+    "tp_1_2_i_not_null" NOT NULL "i"
+
+DROP TABLE t;
+--
 DROP SCHEMA partitions_merge_schema;
diff --git a/src/test/regress/sql/partition_merge.sql b/src/test/regress/sql/partition_merge.sql
index 6a0b35b1799..72b1cb0b35e 100644
--- a/src/test/regress/sql/partition_merge.sql
+++ b/src/test/regress/sql/partition_merge.sql
@@ -445,4 +445,22 @@ DROP TABLE t2;
 DROP TABLE t1;
 
 --
+-- Check the partition index name if the partition name is the same as one
+-- of the merged partitions.
+--
+CREATE TABLE t (i int, PRIMARY KEY(i)) PARTITION BY RANGE (i);
+
+CREATE TABLE tp_0_1 PARTITION OF t FOR VALUES FROM (0) TO (1);
+CREATE TABLE tp_1_2 PARTITION OF t FOR VALUES FROM (1) TO (2);
+
+CREATE INDEX tidx ON t(i);
+ALTER TABLE t MERGE PARTITIONS (tp_1_2, tp_0_1) INTO tp_1_2;
+
+-- Indexname values should be 'tp_1_2_pkey' and 'tp_1_2_i_idx'.
+-- Not-null constraint name should be 'tp_1_2_i_not_null'.
+\d+ tp_1_2
+
+DROP TABLE t;
+
+--
 DROP SCHEMA partitions_merge_schema;