From f25b792788bb527bd360c98d94348d3ba8ffae5a Mon Sep 17 00:00:00 2001
From: Ayush Tiwari <ayushtiwari.slg01@gmail.com>
Date: Tue, 21 Apr 2026 14:54:38 +0530
Subject: [PATCH v2] Fix errmsg issues in ALTER TABLE SPLIT/MERGE PARTITION

Fix several issues with error messages in the ALTER TABLE SPLIT
PARTITION and ALTER TABLE MERGE PARTITIONS code:

1. In transformPartitionCmdForSplit(), the ereport() that fires when
   splitting a non-default partition while a default partition already
   exists had two errmsg() calls. The second one is changed to
   errdetail(), with proper capitalization and trailing period.

2. All occurrences of 'can not' are replaced with 'cannot' for
   correctness across parse_utilcmd.c, partbounds.c, and tablecmds.c.

3. The grammatically incorrect 'DEFAULT partition should be one' is
   reworded to 'cannot specify more than one DEFAULT partition'.

4. The confusing messages 'can not split to partition X together with
   partition Y' and 'can not merge partition X together with partition
   Y' are rewritten as 'cannot split/merge non-adjacent partitions X
   and Y' with a clearer errdetail. The now-redundant errhint about
   adjacency is removed.

5. Grammar fix in errhint: 'To split DEFAULT partition one of the new
   partition must be DEFAULT' -> 'To split a DEFAULT partition, one of
   the new partitions must be DEFAULT.'

6. Remove '-- ERROR:', '-- DETAIL:', and '-- HINT:' comments from
   partition_split.sql, partition_merge.sql, and their .out files that
   were exact duplicates of the error messages. These are a maintenance
   burden and are not used elsewhere in the test suite.
---
 src/backend/commands/tablecmds.c              |  2 +-
 src/backend/parser/parse_utilcmd.c            | 12 +--
 src/backend/partitioning/partbounds.c         | 10 +--
 src/test/regress/expected/partition_merge.out | 32 +-------
 src/test/regress/expected/partition_split.out | 77 ++++---------------
 src/test/regress/sql/partition_merge.sql      | 22 ------
 src/test/regress/sql/partition_split.sql      | 43 -----------
 7 files changed, 30 insertions(+), 168 deletions(-)

diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index eec09ba1ded..c7116bfedb4 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -23389,7 +23389,7 @@ SplitPartitionMoveRows(List **wqueue, Relation rel, Relation splitRel,
 			else
 				ereport(ERROR,
 						errcode(ERRCODE_CHECK_VIOLATION),
-						errmsg("can not find partition for split partition row"),
+						errmsg("cannot find partition for split partition row"),
 						errtable(splitRel));
 		}
 
diff --git a/src/backend/parser/parse_utilcmd.c b/src/backend/parser/parse_utilcmd.c
index 37071502a9f..035660bb7cb 100644
--- a/src/backend/parser/parse_utilcmd.c
+++ b/src/backend/parser/parse_utilcmd.c
@@ -3618,7 +3618,7 @@ transformPartitionCmdForSplit(CreateStmtContext *cxt, PartitionCmd *partcmd)
 						if (default_index != -1)
 							ereport(ERROR,
 									errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
-									errmsg("DEFAULT partition should be one"),
+									errmsg("cannot specify more than one DEFAULT partition"),
 									parser_errposition(cxt->pstate, sps->name->location));
 
 						default_index = foreach_current_index(sps);
@@ -3645,9 +3645,9 @@ transformPartitionCmdForSplit(CreateStmtContext *cxt, PartitionCmd *partcmd)
 	if (isSplitPartDefault && default_index == -1)
 		ereport(ERROR,
 				errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
-				errmsg("can not split DEFAULT partition \"%s\"",
+				errmsg("cannot split DEFAULT partition \"%s\"",
 					   get_rel_name(splitPartOid)),
-				errhint("To split DEFAULT partition one of the new partition must be DEFAULT."),
+				errhint("To split a DEFAULT partition, one of the new partitions must be DEFAULT."),
 				parser_errposition(cxt->pstate, ((SinglePartitionSpec *) linitial(splitlist))->name->location));
 
 	/*
@@ -3662,10 +3662,10 @@ transformPartitionCmdForSplit(CreateStmtContext *cxt, PartitionCmd *partcmd)
 
 		ereport(ERROR,
 				errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
-				errmsg("can not split non-DEFAULT partition \"%s\"",
+				errmsg("cannot split non-DEFAULT partition \"%s\"",
 					   get_rel_name(splitPartOid)),
-				errmsg("new partition cannot be DEFAULT because DEFAULT partition \"%s\" already exists",
-					   get_rel_name(defaultPartOid)),
+				errdetail("New partition cannot be DEFAULT because DEFAULT partition \"%s\" already exists.",
+						  get_rel_name(defaultPartOid)),
 				parser_errposition(cxt->pstate, spsDef->name->location));
 	}
 
diff --git a/src/backend/partitioning/partbounds.c b/src/backend/partitioning/partbounds.c
index 05250eda472..438e255939e 100644
--- a/src/backend/partitioning/partbounds.c
+++ b/src/backend/partitioning/partbounds.c
@@ -5030,20 +5030,18 @@ check_two_partitions_bounds_range(Relation parent,
 		if (is_merge)
 			ereport(ERROR,
 					errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
-					errmsg("can not merge partition \"%s\" together with partition \"%s\"",
+					errmsg("cannot merge non-adjacent partitions \"%s\" and \"%s\"",
 						   second_name->relname, first_name->relname),
-					errdetail("lower bound of partition \"%s\" is not equal to the upper bound of partition \"%s\"",
+					errdetail("Lower bound of partition \"%s\" is not equal to upper bound of partition \"%s\".",
 							  second_name->relname, first_name->relname),
-					errhint("ALTER TABLE ... MERGE PARTITIONS requires the partition bounds to be adjacent."),
 					parser_errposition(pstate, datum->location));
 		else
 			ereport(ERROR,
 					errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
-					errmsg("can not split to partition \"%s\" together with partition \"%s\"",
+					errmsg("cannot split non-adjacent partitions \"%s\" and \"%s\"",
 						   second_name->relname, first_name->relname),
-					errdetail("lower bound of partition \"%s\" is not equal to the upper bound of partition \"%s\"",
+					errdetail("Lower bound of partition \"%s\" is not equal to upper bound of partition \"%s\".",
 							  second_name->relname, first_name->relname),
-					errhint("ALTER TABLE ... SPLIT PARTITION requires the partition bounds to be adjacent."),
 					parser_errposition(pstate, datum->location));
 	}
 }
diff --git a/src/test/regress/expected/partition_merge.out b/src/test/regress/expected/partition_merge.out
index 883110e25d9..4480e7e5116 100644
--- a/src/test/regress/expected/partition_merge.out
+++ b/src/test/regress/expected/partition_merge.out
@@ -21,30 +21,21 @@ CREATE TABLE sales_apr_1 PARTITION OF sales_apr2022 FOR VALUES FROM ('2022-04-01
 CREATE TABLE sales_apr_2 PARTITION OF sales_apr2022 FOR VALUES FROM ('2022-04-15') TO ('2022-05-01');
 ALTER TABLE sales_range ATTACH PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01');
 CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
--- ERROR:  partition with name "sales_feb2022" is already used
 ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_feb2022) INTO sales_feb_mar_apr2022;
 ERROR:  partition with name "sales_feb2022" is already used
 LINE 1: ...e MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_feb2...
                                                              ^
--- ERROR:  "sales_apr2022" is not a table
 ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_apr2022) INTO sales_feb_mar_apr2022;
 ERROR:  "sales_apr2022" is not a table
 HINT:  ALTER TABLE ... MERGE PARTITIONS can only merge partitions don't have sub-partitions.
--- ERROR:  can not merge partition "sales_mar2022" together with partition "sales_jan2022"
--- DETAIL:  lower bound of partition "sales_mar2022" is not equal to the upper bound of partition "sales_jan2022"
 -- (space between sections sales_jan2022 and sales_mar2022)
 ALTER TABLE sales_range MERGE PARTITIONS (sales_jan2022, sales_mar2022) INTO sales_jan_mar2022;
-ERROR:  can not merge partition "sales_mar2022" together with partition "sales_jan2022"
-DETAIL:  lower bound of partition "sales_mar2022" is not equal to the upper bound of partition "sales_jan2022"
-HINT:  ALTER TABLE ... MERGE PARTITIONS requires the partition bounds to be adjacent.
--- ERROR:  can not merge partition "sales_jan2022" together with partition "sales_dec2021"
--- DETAIL:  lower bound of partition "sales_jan2022" is not equal to the upper bound of partition "sales_dec2021"
+ERROR:  cannot merge non-adjacent partitions "sales_mar2022" and "sales_jan2022"
+DETAIL:  Lower bound of partition "sales_mar2022" is not equal to upper bound of partition "sales_jan2022".
 -- (space between sections sales_dec2021 and sales_jan2022)
 ALTER TABLE sales_range MERGE PARTITIONS (sales_dec2021, sales_jan2022, sales_feb2022) INTO sales_dec_jan_feb2022;
-ERROR:  can not merge partition "sales_jan2022" together with partition "sales_dec2021"
-DETAIL:  lower bound of partition "sales_jan2022" is not equal to the upper bound of partition "sales_dec2021"
-HINT:  ALTER TABLE ... MERGE PARTITIONS requires the partition bounds to be adjacent.
--- ERROR:  partition with name "sales_feb2022" is already used
+ERROR:  cannot merge non-adjacent partitions "sales_jan2022" and "sales_dec2021"
+DETAIL:  Lower bound of partition "sales_jan2022" is not equal to upper bound of partition "sales_dec2021".
 ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, partitions_merge_schema.sales_feb2022) INTO sales_feb_mar_apr2022;
 ERROR:  partition with name "sales_feb2022" is already used
 LINE 1: ...e MERGE PARTITIONS (sales_feb2022, sales_mar2022, partitions...
@@ -480,15 +471,12 @@ CREATE TABLE sales_nord2 PARTITION OF sales_list2 FOR VALUES IN ('Oslo', 'St. Pe
 CREATE TABLE sales_others2 PARTITION OF sales_list2 DEFAULT;
 CREATE TABLE sales_external (LIKE sales_list);
 CREATE TABLE sales_external2 (vch VARCHAR(5));
--- ERROR:  "sales_external" is not a partition of partitioned table "sales_list"
 ALTER TABLE sales_list MERGE PARTITIONS (sales_west, sales_east, sales_external) INTO sales_all;
 ERROR:  "sales_external" is not a partition of partitioned table "sales_list"
 HINT:  ALTER TABLE ... MERGE PARTITIONS can only merge partitions don't have sub-partitions.
--- ERROR:  "sales_external2" is not a partition of partitioned table "sales_list"
 ALTER TABLE sales_list MERGE PARTITIONS (sales_west, sales_east, sales_external2) INTO sales_all;
 ERROR:  "sales_external2" is not a partition of partitioned table "sales_list"
 HINT:  ALTER TABLE ... MERGE PARTITIONS can only merge partitions don't have sub-partitions.
--- ERROR:  relation "sales_nord2" is not a partition of relation "sales_list"
 ALTER TABLE sales_list MERGE PARTITIONS (sales_west, sales_nord2, sales_east) INTO sales_all;
 ERROR:  relation "sales_nord2" is not a partition of relation "sales_list"
 HINT:  ALTER TABLE ... MERGE PARTITIONS can only merge partitions don't have sub-partitions.
@@ -630,11 +618,9 @@ CREATE TABLE t1p1 PARTITION OF t1 FOR VALUES FROM (1, 1) TO (1, 2);
 CREATE TABLE t2 (i int, t text) PARTITION BY RANGE (t);
 CREATE TABLE t2pa PARTITION OF t2 FOR VALUES FROM ('A') TO ('C');
 CREATE TABLE t3 (i int, t text);
--- ERROR:  relation "t1p1" is not a partition of relation "t2"
 ALTER TABLE t2 MERGE PARTITIONS (t1p1, t2pa) INTO t2p;
 ERROR:  relation "t1p1" is not a partition of relation "t2"
 HINT:  ALTER TABLE ... MERGE PARTITIONS can only merge partitions don't have sub-partitions.
--- ERROR:  "t3" is not a partition of partitioned table "t2"
 ALTER TABLE t2 MERGE PARTITIONS (t2pa, t3) INTO t2p;
 ERROR:  "t3" is not a partition of partitioned table "t2"
 HINT:  ALTER TABLE ... MERGE PARTITIONS can only merge partitions don't have sub-partitions.
@@ -690,7 +676,6 @@ EXECUTE get_partition_info('{t}');
  tp_3_4 | t              | r       | f                | FOR VALUES FROM (3) TO (4)
 (2 rows)
 
--- ERROR:  cannot create a permanent relation as partition of temporary relation "t"
 ALTER TABLE t MERGE PARTITIONS (tp_0_3, tp_3_4) INTO tp_0_4;
 ERROR:  cannot create a permanent relation as partition of temporary relation "t"
 ROLLBACK;
@@ -806,19 +791,16 @@ CREATE TABLE t (i int) 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);
 SET SESSION AUTHORIZATION regress_partition_merge_bob;
--- ERROR:  must be owner of table t
 ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
 ERROR:  must be owner of table t
 RESET SESSION AUTHORIZATION;
 ALTER TABLE t OWNER TO regress_partition_merge_bob;
 SET SESSION AUTHORIZATION regress_partition_merge_bob;
--- ERROR:  must be owner of table tp_0_1
 ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
 ERROR:  must be owner of table tp_0_1
 RESET SESSION AUTHORIZATION;
 ALTER TABLE tp_0_1 OWNER TO regress_partition_merge_bob;
 SET SESSION AUTHORIZATION regress_partition_merge_bob;
--- ERROR:  must be owner of table tp_1_2
 ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
 ERROR:  must be owner of table tp_1_2
 RESET SESSION AUTHORIZATION;
@@ -852,7 +834,6 @@ ALTER TABLE t ATTACH PARTITION tp_1_2 FOR VALUES FROM (1) TO (2);
  partitions_merge_schema | tp_1_2 | table | regress_partition_merge_bob
 (1 row)
 
--- ERROR:  partitions being merged have different owners
 ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
 ERROR:  partitions being merged have different owners
 DROP TABLE t;
@@ -864,10 +845,8 @@ DROP ROLE regress_partition_merge_bob;
 CREATE TABLE t (i int) PARTITION BY HASH(i);
 CREATE TABLE tp1 PARTITION OF t FOR VALUES WITH (MODULUS 2, REMAINDER 0);
 CREATE TABLE tp2 PARTITION OF t FOR VALUES WITH (MODULUS 2, REMAINDER 1);
--- ERROR:  partition of hash-partitioned table cannot be merged
 ALTER TABLE t MERGE PARTITIONS (tp1, tp2) INTO tp3;
 ERROR:  partition of hash-partitioned table cannot be merged
--- ERROR:  list of partitions to be merged should include at least two partitions
 ALTER TABLE t MERGE PARTITIONS (tp1) INTO tp3;
 ERROR:  list of partitions to be merged should include at least two partitions
 DROP TABLE t;
@@ -999,7 +978,6 @@ Indexes:
 Referenced by:
     TABLE "t_fk" CONSTRAINT "t_fk_i_fkey" FOREIGN KEY (i) REFERENCES t(i) NOT VALID
 
--- ERROR:  insert or update on table "t_fk" violates foreign key constraint "t_fk_i_fkey"
 ALTER TABLE t_fk VALIDATE CONSTRAINT t_fk_i_fkey;
 ERROR:  insert or update on table "t_fk" violates foreign key constraint "t_fk_i_fkey"
 DETAIL:  Key (i)=(2) is not present in table "t".
@@ -1026,7 +1004,6 @@ Indexes:
 Referenced by:
     TABLE "t_fk" CONSTRAINT "t_fk_i_fkey" FOREIGN KEY (i) REFERENCES t(i) NOT ENFORCED
 
--- ERROR:  insert or update on table "t_fk" violates foreign key constraint "t_fk_i_fkey"
 ALTER TABLE t_fk ALTER CONSTRAINT t_fk_i_fkey ENFORCED;
 ERROR:  insert or update on table "t_fk" violates foreign key constraint "t_fk_i_fkey"
 DETAIL:  Key (i)=(2) is not present in table "t".
@@ -1070,7 +1047,6 @@ ALTER TABLE t ADD CHECK (i > 0);
 INSERT INTO t VALUES (5), (15);
 ALTER TABLE t MERGE PARTITIONS (tp_1, tp_2) INTO tp_12;
 INSERT INTO t VALUES (16);
--- ERROR:  new row for relation "tp_12" violates check constraint "t_i_check"
 INSERT INTO t VALUES (0);
 ERROR:  new row for relation "tp_12" violates check constraint "t_i_check"
 DETAIL:  Failing row contains (0, virtual).
diff --git a/src/test/regress/expected/partition_split.out b/src/test/regress/expected/partition_split.out
index 43ca299648e..21bfddfc47f 100644
--- a/src/test/regress/expected/partition_split.out
+++ b/src/test/regress/expected/partition_split.out
@@ -15,19 +15,16 @@ CREATE TABLE sales_range (salesperson_id int, sales_date date) PARTITION BY RANG
 CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-02-01');
 CREATE TABLE sales_feb_mar_apr2022 PARTITION OF sales_range FOR VALUES FROM ('2022-02-01') TO ('2022-05-01');
 CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
--- ERROR:  relation "sales_xxx" does not exist
 ALTER TABLE sales_range SPLIT PARTITION sales_xxx INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 ERROR:  relation "sales_xxx" does not exist
--- ERROR:  relation "sales_jan2022" already exists
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_jan2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 ERROR:  relation "sales_jan2022" already exists
--- ERROR:  invalid bound specification for a range partition
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_jan2022 FOR VALUES IN ('2022-05-01', '2022-06-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
@@ -35,7 +32,6 @@ ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
 ERROR:  invalid bound specification for a range partition
 LINE 2:   (PARTITION sales_jan2022 FOR VALUES IN ('2022-05-01', '202...
                                               ^
--- ERROR:  empty range bound specified for partition "sales_mar2022"
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-02-01'),
@@ -44,12 +40,9 @@ ERROR:  empty range bound specified for partition "sales_mar2022"
 LINE 3:    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO...
                                                     ^
 DETAIL:  Specified lower bound ('03-01-2022') is greater than or equal to upper bound ('02-01-2022').
---ERROR:  list of split partitions should contain at least two items
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-10-01'));
 ERROR:  list of new partitions should contain at least two partitions
--- ERROR:  lower bound of partition "sales_feb2022" is not equal to lower bound of split partition "sales_feb_mar_apr2022"
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-01-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
@@ -58,7 +51,6 @@ ERROR:  lower bound of partition "sales_feb2022" is not equal to lower bound of
 LINE 2:   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-01-01') TO...
                                                     ^
 HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
--- ERROR:  partition with name "sales_feb_mar_apr2022" is already used
 -- (We can create partition with the same name as split partition, but can't create two partitions with the same name)
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb_mar_apr2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
@@ -67,7 +59,6 @@ ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
 ERROR:  partition with name "sales_feb_mar_apr2022" is already used
 LINE 3:    PARTITION sales_feb_mar_apr2022 FOR VALUES FROM ('2022-03...
                      ^
--- ERROR:  partition with name "sales_feb2022" is already used
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_feb2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
@@ -75,7 +66,6 @@ ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
 ERROR:  partition with name "sales_feb2022" is already used
 LINE 3:    PARTITION sales_feb2022 FOR VALUES FROM ('2022-03-01') TO...
                      ^
--- ERROR:  partition with name "sales_feb2022" is already used
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION partition_split_schema.sales_feb2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
@@ -83,16 +73,12 @@ ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
 ERROR:  partition with name "sales_feb2022" is already used
 LINE 3:    PARTITION partition_split_schema.sales_feb2022 FOR VALUES...
                      ^
--- ERROR:  ALTER action SPLIT PARTITION cannot be performed on relation "sales_feb_mar_apr2022"
--- DETAIL:  This operation is not supported for tables.
 ALTER TABLE sales_feb_mar_apr2022 SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_jan2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_feb2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 ERROR:  ALTER action SPLIT PARTITION cannot be performed on relation "sales_feb_mar_apr2022"
 DETAIL:  This operation is not supported for tables.
--- ERROR:  upper bound of partition "sales_apr2022" is not equal to upper bound of split partition "sales_feb_mar_apr2022"
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
@@ -101,20 +87,16 @@ ERROR:  upper bound of partition "sales_apr2022" is not equal to upper bound of
 LINE 4: ... sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-06-0...
                                                              ^
 HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
--- ERROR:  can not split to partition "sales_mar2022" together with partition "sales_feb2022"
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-02-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
-ERROR:  can not split to partition "sales_mar2022" together with partition "sales_feb2022"
+ERROR:  cannot split non-adjacent partitions "sales_mar2022" and "sales_feb2022"
 LINE 3:    PARTITION sales_mar2022 FOR VALUES FROM ('2022-02-01') TO...
                                                     ^
-DETAIL:  lower bound of partition "sales_mar2022" is not equal to the upper bound of partition "sales_feb2022"
-HINT:  ALTER TABLE ... SPLIT PARTITION requires the partition bounds to be adjacent.
+DETAIL:  Lower bound of partition "sales_mar2022" is not equal to upper bound of partition "sales_feb2022".
 -- Tests for spaces between partitions, them should be executed without DEFAULT partition
 ALTER TABLE sales_range DETACH PARTITION sales_others;
--- ERROR:  lower bound of partition "sales_feb2022" is not equal to lower bound of split partition "sales_feb_mar_apr2022"
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-02') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
@@ -150,8 +132,6 @@ DROP TABLE sales_others;
 CREATE TABLE sales_range (sales_date date) PARTITION BY RANGE (sales_date);
 CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-02-01');
 CREATE TABLE sales_feb_mar_apr2022 PARTITION OF sales_range FOR VALUES FROM ('2022-02-01') TO ('2022-05-01');
--- ERROR:  upper bound of partition "sales_apr2022" is not equal to upper bound of split partition "sales_feb_mar_apr2022"
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
@@ -461,63 +441,53 @@ DROP TABLE sales_range CASCADE;
 CREATE TABLE sales_range (salesperson_id INT, sales_date date) PARTITION BY RANGE (sales_date);
 CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
 -- sales_error intersects with sales_dec2021 (lower bound)
--- ERROR:  can not split to partition "sales_error" together with partition "sales_dec2021"
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_error FOR VALUES FROM ('2021-12-30') TO ('2022-02-01'),
    PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_others DEFAULT);
-ERROR:  can not split to partition "sales_error" together with partition "sales_dec2021"
+ERROR:  cannot split non-adjacent partitions "sales_error" and "sales_dec2021"
 LINE 3:    PARTITION sales_error FOR VALUES FROM ('2021-12-30') TO (...
                                                   ^
-DETAIL:  lower bound of partition "sales_error" is not equal to the upper bound of partition "sales_dec2021"
-HINT:  ALTER TABLE ... SPLIT PARTITION requires the partition bounds to be adjacent.
+DETAIL:  Lower bound of partition "sales_error" is not equal to upper bound of partition "sales_dec2021".
 -- sales_error intersects with sales_feb2022 (upper bound)
--- ERROR:  can not split to partition "sales_feb2022" together with partition "sales_error"
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_error FOR VALUES FROM ('2022-01-01') TO ('2022-02-02'),
    PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_others DEFAULT);
-ERROR:  can not split to partition "sales_feb2022" together with partition "sales_error"
+ERROR:  cannot split non-adjacent partitions "sales_feb2022" and "sales_error"
 LINE 4:    PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO...
                                                     ^
-DETAIL:  lower bound of partition "sales_feb2022" is not equal to the upper bound of partition "sales_error"
-HINT:  ALTER TABLE ... SPLIT PARTITION requires the partition bounds to be adjacent.
+DETAIL:  Lower bound of partition "sales_feb2022" is not equal to upper bound of partition "sales_error".
 -- sales_error intersects with sales_dec2021 (inside bound)
--- ERROR:  can not split to partition "sales_error" together with partition "sales_dec2021"
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_error FOR VALUES FROM ('2021-12-10') TO ('2021-12-20'),
    PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_others DEFAULT);
-ERROR:  can not split to partition "sales_error" together with partition "sales_dec2021"
+ERROR:  cannot split non-adjacent partitions "sales_error" and "sales_dec2021"
 LINE 3:    PARTITION sales_error FOR VALUES FROM ('2021-12-10') TO (...
                                                   ^
-DETAIL:  lower bound of partition "sales_error" is not equal to the upper bound of partition "sales_dec2021"
-HINT:  ALTER TABLE ... SPLIT PARTITION requires the partition bounds to be adjacent.
+DETAIL:  Lower bound of partition "sales_error" is not equal to upper bound of partition "sales_dec2021".
 -- sales_error intersects with sales_dec2021 (exactly the same bounds)
--- ERROR:  can not split to partition "sales_error" together with partition "sales_dec2021"
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_error FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_others DEFAULT);
-ERROR:  can not split to partition "sales_error" together with partition "sales_dec2021"
+ERROR:  cannot split non-adjacent partitions "sales_error" and "sales_dec2021"
 LINE 3:    PARTITION sales_error FOR VALUES FROM ('2021-12-01') TO (...
                                                   ^
-DETAIL:  lower bound of partition "sales_error" is not equal to the upper bound of partition "sales_dec2021"
-HINT:  ALTER TABLE ... SPLIT PARTITION requires the partition bounds to be adjacent.
--- ERROR:  can not split DEFAULT partition "sales_others"
--- HINT:  To split DEFAULT partition one of the new partition must be DEFAULT.
+DETAIL:  Lower bound of partition "sales_error" is not equal to upper bound of partition "sales_dec2021".
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_jan2022 FOR VALUES FROM ('2022-01-01') TO ('2022-02-01'),
    PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'));
-ERROR:  can not split DEFAULT partition "sales_others"
+ERROR:  cannot split DEFAULT partition "sales_others"
 LINE 2:   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO...
                      ^
-HINT:  To split DEFAULT partition one of the new partition must be DEFAULT.
+HINT:  To split a DEFAULT partition, one of the new partitions must be DEFAULT.
 -- no error: bounds of sales_noerror are between sales_dec2021 and sales_feb2022
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
@@ -579,11 +549,9 @@ SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conre
  FOREIGN KEY (salesperson_id) REFERENCES salespeople(salesperson_id) | sales_range_salesperson_id_fkey | {1}
 (2 rows)
 
--- ERROR:  new row for relation "sales_mar2022" violates check constraint "sales_range_sales_amount_check"
 INSERT INTO sales_range VALUES (1, 0, '2022-03-11');
 ERROR:  new row for relation "sales_mar2022" violates check constraint "sales_range_sales_amount_check"
 DETAIL:  Failing row contains (1, 0, 03-11-2022).
--- ERROR:  insert or update on table "sales_mar2022" violates foreign key constraint "sales_range_salesperson_id_fkey"
 INSERT INTO sales_range VALUES (-1, 10, '2022-03-11');
 ERROR:  insert or update on table "sales_mar2022" violates foreign key constraint "sales_range_salesperson_id_fkey"
 DETAIL:  Key (salesperson_id)=(-1) is not present in table "salespeople".
@@ -637,7 +605,6 @@ SELECT tableoid::regclass, * FROM salespeople ORDER BY tableoid::regclass::text
  salespeople30_40 |             30 | Ford
 (5 rows)
 
--- ERROR:  insert or update on table "sales" violates foreign key constraint "sales_salesperson_id_fkey"
 INSERT INTO sales VALUES (40, 50,  '2022-03-04');
 ERROR:  insert or update on table "sales" violates foreign key constraint "sales_salesperson_id_fkey"
 DETAIL:  Key (salesperson_id)=(40) is not present in table "salespeople".
@@ -857,7 +824,6 @@ CREATE TABLE sales_list (sales_state VARCHAR(20)) PARTITION BY LIST (sales_state
 CREATE TABLE sales_nord PARTITION OF sales_list FOR VALUES IN ('Oslo', 'St. Petersburg', 'Helsinki');
 CREATE TABLE sales_all PARTITION OF sales_list FOR VALUES IN ('Warsaw', 'Lisbon', 'New York', 'Madrid', 'Beijing', 'Berlin', 'Delhi', 'Kyiv', 'Vladivostok');
 CREATE TABLE sales_others PARTITION OF sales_list DEFAULT;
--- ERROR:  new partition "sales_east" would overlap with another (not split) partition "sales_nord"
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok', 'Helsinki'),
@@ -865,7 +831,6 @@ ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
 ERROR:  new partition "sales_east" would overlap with another (not split) partition "sales_nord"
 LINE 3: ...FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok', 'Helsinki'...
                                                              ^
--- ERROR:  new partition "sales_west" would overlap with another new partition "sales_central"
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
@@ -873,7 +838,6 @@ ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
 ERROR:  new partition "sales_west" would overlap with another new partition "sales_central"
 LINE 2:   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York',...
                                                ^
--- ERROR:  new partition "sales_west" cannot have NULL value because split partition "sales_all" does not have
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid', NULL),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
@@ -881,7 +845,6 @@ ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
 ERROR:  new partition "sales_west" cannot have NULL value because split partition "sales_all" does not have
 LINE 2: ...s_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid', NULL),
                                                                  ^
--- ERROR:  new partition "sales_west" cannot have this value because split partition "sales_all" does not have
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid', 'Melbourne'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
@@ -889,20 +852,19 @@ ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
 ERROR:  new partition "sales_west" cannot have this value because split partition "sales_all" does not have
 LINE 2: ...st FOR VALUES IN ('Lisbon', 'New York', 'Madrid', 'Melbourne...
                                                              ^
--- ERROR:  new partition cannot be DEFAULT because DEFAULT partition "sales_others" already exists
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid', 'Melbourne'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
    PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'),
    PARTITION sales_others2 DEFAULT);
-ERROR:  new partition cannot be DEFAULT because DEFAULT partition "sales_others" already exists
+ERROR:  cannot split non-DEFAULT partition "sales_all"
 LINE 5:    PARTITION sales_others2 DEFAULT);
                      ^
+DETAIL:  New partition cannot be DEFAULT because DEFAULT partition "sales_others" already exists.
 DROP TABLE sales_list;
 -- Test for non-symbolic comparison of values (numeric values '0' and '0.0' are equal).
 CREATE TABLE t (a numeric) PARTITION BY LIST (a);
 CREATE TABLE t1 PARTITION OF t FOR VALUES in  ('0', '1');
--- ERROR:  new partition "x" would overlap with another new partition "x1"
 ALTER TABLE t SPLIT PARTITION t1 INTO
   (PARTITION x FOR VALUES IN ('0'),
    PARTITION x1 FOR VALUES IN ('0.0', '1'));
@@ -918,30 +880,25 @@ DROP TABLE t;
 CREATE TABLE sales_list(sales_state VARCHAR(20)) PARTITION BY LIST (sales_state);
 CREATE TABLE sales_nord PARTITION OF sales_list FOR VALUES IN ('Helsinki', 'St. Petersburg', 'Oslo');
 CREATE TABLE sales_all PARTITION OF sales_list FOR VALUES IN ('Warsaw', 'Lisbon', 'New York', 'Madrid', 'Beijing', 'Berlin', 'Delhi', 'Kyiv', 'Vladivostok', NULL);
--- ERROR:  new partitions combined partition bounds do not contain value (NULL) but split partition "sales_all" does
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
    PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'));
 ERROR:  new partitions combined partition bounds do not contain value (NULL) but split partition "sales_all" does
 HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
--- ERROR:  new partitions combined partition bounds do not contain value ('Kyiv'::character varying(20)) but split partition "sales_all" does
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
    PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', NULL));
 ERROR:  new partitions combined partition bounds do not contain value ('Kyiv'::character varying(20)) but split partition "sales_all" does
 HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
--- ERROR  DEFAULT partition should be one
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
    PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'),
    PARTITION sales_others DEFAULT,
    PARTITION sales_others2 DEFAULT);
-ERROR:  DEFAULT partition should be one
+ERROR:  cannot specify more than one DEFAULT partition
 LINE 6:    PARTITION sales_others2 DEFAULT);
                      ^
 DROP TABLE sales_list;
@@ -1202,7 +1159,6 @@ DROP TABLE sales_range;
 CREATE TABLE t1(i int, t text) PARTITION BY LIST (t);
 CREATE TABLE t1pa PARTITION OF t1 FOR VALUES IN ('A');
 CREATE TABLE t2 (i int, t text) PARTITION BY RANGE (t);
--- ERROR:  relation "t1pa" is not a partition of relation "t2"
 ALTER TABLE t2 SPLIT PARTITION t1pa INTO
    (PARTITION t2a FOR VALUES FROM ('A') TO ('B'),
     PARTITION t2b FOR VALUES FROM ('B') TO ('C'));
@@ -1224,7 +1180,6 @@ SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid)
  tp_0_2 | FOR VALUES FROM (0) TO (2) | t
 (1 row)
 
--- ERROR:  cannot create a permanent relation as partition of temporary relation "t"
 ALTER TABLE t SPLIT PARTITION tp_0_2 INTO
   (PARTITION tp_0_1 FOR VALUES FROM (0) TO (1),
    PARTITION tp_1_2 FOR VALUES FROM (1) TO (2));
@@ -1455,12 +1410,10 @@ DROP ROLE regress_partition_split_bob;
 CREATE TABLE t (i int) PARTITION BY HASH(i);
 CREATE TABLE tp1 PARTITION OF t FOR VALUES WITH (MODULUS 2, REMAINDER 0);
 CREATE TABLE tp2 PARTITION OF t FOR VALUES WITH (MODULUS 2, REMAINDER 1);
--- ERROR:  partition of hash-partitioned table cannot be split
 ALTER TABLE t SPLIT PARTITION tp1 INTO
   (PARTITION tp1_1 FOR VALUES WITH (MODULUS 4, REMAINDER 0),
    PARTITION tp1_2 FOR VALUES WITH (MODULUS 4, REMAINDER 2));
 ERROR:  partition of hash-partitioned table cannot be split
--- ERROR:  list of new partitions should contain at least two partitions
 ALTER TABLE t SPLIT PARTITION tp1 INTO
   (PARTITION tp1_1 FOR VALUES WITH (MODULUS 4, REMAINDER 0));
 ERROR:  list of new partitions should contain at least two partitions
diff --git a/src/test/regress/sql/partition_merge.sql b/src/test/regress/sql/partition_merge.sql
index a211fee2ad1..7b117fa34e0 100644
--- a/src/test/regress/sql/partition_merge.sql
+++ b/src/test/regress/sql/partition_merge.sql
@@ -27,19 +27,12 @@ ALTER TABLE sales_range ATTACH PARTITION sales_apr2022 FOR VALUES FROM ('2022-04
 
 CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
 
--- ERROR:  partition with name "sales_feb2022" is already used
 ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_feb2022) INTO sales_feb_mar_apr2022;
--- ERROR:  "sales_apr2022" is not a table
 ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_apr2022) INTO sales_feb_mar_apr2022;
--- ERROR:  can not merge partition "sales_mar2022" together with partition "sales_jan2022"
--- DETAIL:  lower bound of partition "sales_mar2022" is not equal to the upper bound of partition "sales_jan2022"
 -- (space between sections sales_jan2022 and sales_mar2022)
 ALTER TABLE sales_range MERGE PARTITIONS (sales_jan2022, sales_mar2022) INTO sales_jan_mar2022;
--- ERROR:  can not merge partition "sales_jan2022" together with partition "sales_dec2021"
--- DETAIL:  lower bound of partition "sales_jan2022" is not equal to the upper bound of partition "sales_dec2021"
 -- (space between sections sales_dec2021 and sales_jan2022)
 ALTER TABLE sales_range MERGE PARTITIONS (sales_dec2021, sales_jan2022, sales_feb2022) INTO sales_dec_jan_feb2022;
--- ERROR:  partition with name "sales_feb2022" is already used
 ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, partitions_merge_schema.sales_feb2022) INTO sales_feb_mar_apr2022;
 --ERROR, sales_apr_2 already exists
 ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_jan2022) INTO sales_apr_2;
@@ -357,11 +350,8 @@ CREATE TABLE sales_others2 PARTITION OF sales_list2 DEFAULT;
 CREATE TABLE sales_external (LIKE sales_list);
 CREATE TABLE sales_external2 (vch VARCHAR(5));
 
--- ERROR:  "sales_external" is not a partition of partitioned table "sales_list"
 ALTER TABLE sales_list MERGE PARTITIONS (sales_west, sales_east, sales_external) INTO sales_all;
--- ERROR:  "sales_external2" is not a partition of partitioned table "sales_list"
 ALTER TABLE sales_list MERGE PARTITIONS (sales_west, sales_east, sales_external2) INTO sales_all;
--- ERROR:  relation "sales_nord2" is not a partition of relation "sales_list"
 ALTER TABLE sales_list MERGE PARTITIONS (sales_west, sales_nord2, sales_east) INTO sales_all;
 
 DROP TABLE sales_external2;
@@ -438,9 +428,7 @@ CREATE TABLE t2 (i int, t text) PARTITION BY RANGE (t);
 CREATE TABLE t2pa PARTITION OF t2 FOR VALUES FROM ('A') TO ('C');
 CREATE TABLE t3 (i int, t text);
 
--- ERROR:  relation "t1p1" is not a partition of relation "t2"
 ALTER TABLE t2 MERGE PARTITIONS (t1p1, t2pa) INTO t2p;
--- ERROR:  "t3" is not a partition of partitioned table "t2"
 ALTER TABLE t2 MERGE PARTITIONS (t2pa, t3) INTO t2p;
 
 DROP TABLE t3;
@@ -481,7 +469,6 @@ ALTER TABLE t MERGE PARTITIONS (tp_0_2, tp_2_3) INTO pg_temp.tp_0_3;
 
 -- Partition should be temporary.
 EXECUTE get_partition_info('{t}');
--- ERROR:  cannot create a permanent relation as partition of temporary relation "t"
 ALTER TABLE t MERGE PARTITIONS (tp_0_3, tp_3_4) INTO tp_0_4;
 ROLLBACK;
 
@@ -567,19 +554,16 @@ 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);
 
 SET SESSION AUTHORIZATION regress_partition_merge_bob;
--- ERROR:  must be owner of table t
 ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
 RESET SESSION AUTHORIZATION;
 
 ALTER TABLE t OWNER TO regress_partition_merge_bob;
 SET SESSION AUTHORIZATION regress_partition_merge_bob;
--- ERROR:  must be owner of table tp_0_1
 ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
 RESET SESSION AUTHORIZATION;
 
 ALTER TABLE tp_0_1 OWNER TO regress_partition_merge_bob;
 SET SESSION AUTHORIZATION regress_partition_merge_bob;
--- ERROR:  must be owner of table tp_1_2
 ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
 RESET SESSION AUTHORIZATION;
 
@@ -607,7 +591,6 @@ ALTER TABLE t ATTACH PARTITION tp_1_2 FOR VALUES FROM (1) TO (2);
 -- Owner is 'regress_partition_merge_bob':
 \dt tp_1_2
 
--- ERROR:  partitions being merged have different owners
 ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
 
 DROP TABLE t;
@@ -622,10 +605,8 @@ CREATE TABLE t (i int) PARTITION BY HASH(i);
 CREATE TABLE tp1 PARTITION OF t FOR VALUES WITH (MODULUS 2, REMAINDER 0);
 CREATE TABLE tp2 PARTITION OF t FOR VALUES WITH (MODULUS 2, REMAINDER 1);
 
--- ERROR:  partition of hash-partitioned table cannot be merged
 ALTER TABLE t MERGE PARTITIONS (tp1, tp2) INTO tp3;
 
--- ERROR:  list of partitions to be merged should include at least two partitions
 ALTER TABLE t MERGE PARTITIONS (tp1) INTO tp3;
 
 DROP TABLE t;
@@ -712,7 +693,6 @@ ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
 
 -- Should be NOT VALID FOREIGN KEY
 \d tp_0_2
--- ERROR:  insert or update on table "t_fk" violates foreign key constraint "t_fk_i_fkey"
 ALTER TABLE t_fk VALIDATE CONSTRAINT t_fk_i_fkey;
 
 DROP TABLE t_fk;
@@ -731,7 +711,6 @@ ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
 
 -- Should be NOT ENFORCED FOREIGN KEY
 \d tp_0_2
--- ERROR:  insert or update on table "t_fk" violates foreign key constraint "t_fk_i_fkey"
 ALTER TABLE t_fk ALTER CONSTRAINT t_fk_i_fkey ENFORCED;
 
 DROP TABLE t_fk;
@@ -774,7 +753,6 @@ INSERT INTO t VALUES (5), (15);
 ALTER TABLE t MERGE PARTITIONS (tp_1, tp_2) INTO tp_12;
 
 INSERT INTO t VALUES (16);
--- ERROR:  new row for relation "tp_12" violates check constraint "t_i_check"
 INSERT INTO t VALUES (0);
 -- Should be 3 rows: (5), (15), (16):
 SELECT i FROM t ORDER BY i;
diff --git a/src/test/regress/sql/partition_split.sql b/src/test/regress/sql/partition_split.sql
index 44fcf208ac6..dd976519ee2 100644
--- a/src/test/regress/sql/partition_split.sql
+++ b/src/test/regress/sql/partition_split.sql
@@ -19,75 +19,60 @@ CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01
 CREATE TABLE sales_feb_mar_apr2022 PARTITION OF sales_range FOR VALUES FROM ('2022-02-01') TO ('2022-05-01');
 CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
 
--- ERROR:  relation "sales_xxx" does not exist
 ALTER TABLE sales_range SPLIT PARTITION sales_xxx INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 
--- ERROR:  relation "sales_jan2022" already exists
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_jan2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 
--- ERROR:  invalid bound specification for a range partition
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_jan2022 FOR VALUES IN ('2022-05-01', '2022-06-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 
--- ERROR:  empty range bound specified for partition "sales_mar2022"
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-02-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 
---ERROR:  list of split partitions should contain at least two items
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-10-01'));
 
--- ERROR:  lower bound of partition "sales_feb2022" is not equal to lower bound of split partition "sales_feb_mar_apr2022"
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-01-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 
--- ERROR:  partition with name "sales_feb_mar_apr2022" is already used
 -- (We can create partition with the same name as split partition, but can't create two partitions with the same name)
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb_mar_apr2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_feb_mar_apr2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 
--- ERROR:  partition with name "sales_feb2022" is already used
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_feb2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 
--- ERROR:  partition with name "sales_feb2022" is already used
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION partition_split_schema.sales_feb2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 
--- ERROR:  ALTER action SPLIT PARTITION cannot be performed on relation "sales_feb_mar_apr2022"
--- DETAIL:  This operation is not supported for tables.
 ALTER TABLE sales_feb_mar_apr2022 SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_jan2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_feb2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
 
--- ERROR:  upper bound of partition "sales_apr2022" is not equal to upper bound of split partition "sales_feb_mar_apr2022"
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
    PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-06-01'));
 
--- ERROR:  can not split to partition "sales_mar2022" together with partition "sales_feb2022"
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-02-01') TO ('2022-04-01'),
@@ -96,8 +81,6 @@ ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
 -- Tests for spaces between partitions, them should be executed without DEFAULT partition
 ALTER TABLE sales_range DETACH PARTITION sales_others;
 
--- ERROR:  lower bound of partition "sales_feb2022" is not equal to lower bound of split partition "sales_feb_mar_apr2022"
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-02') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
@@ -121,8 +104,6 @@ CREATE TABLE sales_range (sales_date date) PARTITION BY RANGE (sales_date);
 CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-02-01');
 CREATE TABLE sales_feb_mar_apr2022 PARTITION OF sales_range FOR VALUES FROM ('2022-02-01') TO ('2022-05-01');
 
--- ERROR:  upper bound of partition "sales_apr2022" is not equal to upper bound of split partition "sales_feb_mar_apr2022"
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
   (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
@@ -299,7 +280,6 @@ CREATE TABLE sales_range (salesperson_id INT, sales_date date) PARTITION BY RANG
 CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
 
 -- sales_error intersects with sales_dec2021 (lower bound)
--- ERROR:  can not split to partition "sales_error" together with partition "sales_dec2021"
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_error FOR VALUES FROM ('2021-12-30') TO ('2022-02-01'),
@@ -307,7 +287,6 @@ ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
    PARTITION sales_others DEFAULT);
 
 -- sales_error intersects with sales_feb2022 (upper bound)
--- ERROR:  can not split to partition "sales_feb2022" together with partition "sales_error"
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_error FOR VALUES FROM ('2022-01-01') TO ('2022-02-02'),
@@ -315,7 +294,6 @@ ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
    PARTITION sales_others DEFAULT);
 
 -- sales_error intersects with sales_dec2021 (inside bound)
--- ERROR:  can not split to partition "sales_error" together with partition "sales_dec2021"
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_error FOR VALUES FROM ('2021-12-10') TO ('2021-12-20'),
@@ -323,15 +301,12 @@ ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
    PARTITION sales_others DEFAULT);
 
 -- sales_error intersects with sales_dec2021 (exactly the same bounds)
--- ERROR:  can not split to partition "sales_error" together with partition "sales_dec2021"
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_error FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
    PARTITION sales_others DEFAULT);
 
--- ERROR:  can not split DEFAULT partition "sales_others"
--- HINT:  To split DEFAULT partition one of the new partition must be DEFAULT.
 ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
   (PARTITION sales_dec2021 FOR VALUES FROM ('2021-12-01') TO ('2022-01-01'),
    PARTITION sales_jan2022 FOR VALUES FROM ('2022-01-01') TO ('2022-02-01'),
@@ -385,9 +360,7 @@ SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conre
 SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'sales_mar2022'::regclass::oid ORDER BY conname COLLATE "C";
 SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'sales_apr2022'::regclass::oid ORDER BY conname COLLATE "C";
 
--- ERROR:  new row for relation "sales_mar2022" violates check constraint "sales_range_sales_amount_check"
 INSERT INTO sales_range VALUES (1, 0, '2022-03-11');
--- ERROR:  insert or update on table "sales_mar2022" violates foreign key constraint "sales_range_salesperson_id_fkey"
 INSERT INTO sales_range VALUES (-1, 10, '2022-03-11');
 -- ok
 INSERT INTO sales_range VALUES (1, 10, '2022-03-11');
@@ -430,7 +403,6 @@ ALTER TABLE salespeople SPLIT PARTITION salespeople10_40 INTO
 
 SELECT tableoid::regclass, * FROM salespeople ORDER BY tableoid::regclass::text COLLATE "C", salesperson_id;
 
--- ERROR:  insert or update on table "sales" violates foreign key constraint "sales_salesperson_id_fkey"
 INSERT INTO sales VALUES (40, 50,  '2022-03-04');
 -- ok
 INSERT INTO sales VALUES (30, 50,  '2022-03-04');
@@ -608,31 +580,26 @@ CREATE TABLE sales_nord PARTITION OF sales_list FOR VALUES IN ('Oslo', 'St. Pete
 CREATE TABLE sales_all PARTITION OF sales_list FOR VALUES IN ('Warsaw', 'Lisbon', 'New York', 'Madrid', 'Beijing', 'Berlin', 'Delhi', 'Kyiv', 'Vladivostok');
 CREATE TABLE sales_others PARTITION OF sales_list DEFAULT;
 
--- ERROR:  new partition "sales_east" would overlap with another (not split) partition "sales_nord"
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok', 'Helsinki'),
    PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'));
 
--- ERROR:  new partition "sales_west" would overlap with another new partition "sales_central"
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
    PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Lisbon', 'Kyiv'));
 
--- ERROR:  new partition "sales_west" cannot have NULL value because split partition "sales_all" does not have
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid', NULL),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
    PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'));
 
--- ERROR:  new partition "sales_west" cannot have this value because split partition "sales_all" does not have
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid', 'Melbourne'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
    PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'));
 
--- ERROR:  new partition cannot be DEFAULT because DEFAULT partition "sales_others" already exists
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid', 'Melbourne'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
@@ -644,7 +611,6 @@ DROP TABLE sales_list;
 -- Test for non-symbolic comparison of values (numeric values '0' and '0.0' are equal).
 CREATE TABLE t (a numeric) PARTITION BY LIST (a);
 CREATE TABLE t1 PARTITION OF t FOR VALUES in  ('0', '1');
--- ERROR:  new partition "x" would overlap with another new partition "x1"
 ALTER TABLE t SPLIT PARTITION t1 INTO
   (PARTITION x FOR VALUES IN ('0'),
    PARTITION x1 FOR VALUES IN ('0.0', '1'));
@@ -660,21 +626,16 @@ CREATE TABLE sales_list(sales_state VARCHAR(20)) PARTITION BY LIST (sales_state)
 CREATE TABLE sales_nord PARTITION OF sales_list FOR VALUES IN ('Helsinki', 'St. Petersburg', 'Oslo');
 CREATE TABLE sales_all PARTITION OF sales_list FOR VALUES IN ('Warsaw', 'Lisbon', 'New York', 'Madrid', 'Beijing', 'Berlin', 'Delhi', 'Kyiv', 'Vladivostok', NULL);
 
--- ERROR:  new partitions combined partition bounds do not contain value (NULL) but split partition "sales_all" does
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
    PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'));
 
--- ERROR:  new partitions combined partition bounds do not contain value ('Kyiv'::character varying(20)) but split partition "sales_all" does
--- HINT:  ALTER TABLE ... SPLIT PARTITION require combined bounds of new partitions must exactly match the bound of the split partition.
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
    PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', NULL));
 
--- ERROR  DEFAULT partition should be one
 ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
   (PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
    PARTITION sales_east FOR VALUES IN ('Beijing', 'Delhi', 'Vladivostok'),
@@ -849,7 +810,6 @@ CREATE TABLE t1(i int, t text) PARTITION BY LIST (t);
 CREATE TABLE t1pa PARTITION OF t1 FOR VALUES IN ('A');
 CREATE TABLE t2 (i int, t text) PARTITION BY RANGE (t);
 
--- ERROR:  relation "t1pa" is not a partition of relation "t2"
 ALTER TABLE t2 SPLIT PARTITION t1pa INTO
    (PARTITION t2a FOR VALUES FROM ('A') TO ('B'),
     PARTITION t2b FOR VALUES FROM ('B') TO ('C'));
@@ -868,7 +828,6 @@ SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid)
   WHERE c.oid = i.inhrelid AND i.inhparent = 't'::regclass
   ORDER BY pg_catalog.pg_get_expr(c.relpartbound, c.oid) = 'DEFAULT', c.oid::pg_catalog.regclass::pg_catalog.text COLLATE "C";
 
--- ERROR:  cannot create a permanent relation as partition of temporary relation "t"
 ALTER TABLE t SPLIT PARTITION tp_0_2 INTO
   (PARTITION tp_0_1 FOR VALUES FROM (0) TO (1),
    PARTITION tp_1_2 FOR VALUES FROM (1) TO (2));
@@ -1033,12 +992,10 @@ CREATE TABLE t (i int) PARTITION BY HASH(i);
 CREATE TABLE tp1 PARTITION OF t FOR VALUES WITH (MODULUS 2, REMAINDER 0);
 CREATE TABLE tp2 PARTITION OF t FOR VALUES WITH (MODULUS 2, REMAINDER 1);
 
--- ERROR:  partition of hash-partitioned table cannot be split
 ALTER TABLE t SPLIT PARTITION tp1 INTO
   (PARTITION tp1_1 FOR VALUES WITH (MODULUS 4, REMAINDER 0),
    PARTITION tp1_2 FOR VALUES WITH (MODULUS 4, REMAINDER 2));
 
--- ERROR:  list of new partitions should contain at least two partitions
 ALTER TABLE t SPLIT PARTITION tp1 INTO
   (PARTITION tp1_1 FOR VALUES WITH (MODULUS 4, REMAINDER 0));
 
-- 
2.34.1

