SQL command <literal>CREATE TABLE <replaceable class="parameter">partition_nameN</replaceable> (LIKE <replaceable class="parameter">name</replaceable> INCLUDING ALL EXCLUDING INDEXES EXCLUDING IDENTITY)</literal>.
The indexes and identity are created later, after moving the data
into the new partitions.
+ If the parent table is persistent then new partitions are created
+ persistent. If the parent table is temporary then new partitions
+ are also created temporary.
</para>
<note>
<para>
SQL command <literal>CREATE TABLE <replaceable class="parameter">partition_name</replaceable> (LIKE <replaceable class="parameter">name</replaceable> INCLUDING ALL EXCLUDING INDEXES EXCLUDING IDENTITY)</literal>.
The indexes and identity are created later, after moving the data
into the new partition.
+ If the parent table is persistent then the new partition is created
+ persistent. If the parent table is temporary then the new partition
+ is also created temporary.
</para>
<note>
<para>
/*
* createPartitionTable: create table for a new partition with given name
- * (newPartName) like table (modelRelName)
+ * (newPartName) like table (modelRel)
*
- * Emulates command: CREATE TABLE <newPartName> (LIKE <modelRelName>
+ * Emulates command: CREATE [TEMP] TABLE <newPartName> (LIKE <modelRel's name>
* INCLUDING ALL EXCLUDING INDEXES EXCLUDING IDENTITY)
+ * Function returns the created relation (locked in AccessExclusiveLock mode).
*/
-static void
-createPartitionTable(RangeVar *newPartName, RangeVar *modelRelName,
+static Relation
+createPartitionTable(RangeVar *newPartName, Relation modelRel,
AlterTableUtilityContext *context)
{
CreateStmt *createStmt;
TableLikeClause *tlc;
PlannedStmt *wrapper;
+ Relation newRel;
+
+ /* If existing rel is temp, it must belong to this session */
+ if (modelRel->rd_rel->relpersistence == RELPERSISTENCE_TEMP &&
+ !modelRel->rd_islocaltemp)
+ ereport(ERROR,
+ (errcode(ERRCODE_WRONG_OBJECT_TYPE),
+ errmsg("cannot create as partition of temporary relation of another session")));
+
+ /* New partition should have the same persistence as modelRel */
+ newPartName->relpersistence = modelRel->rd_rel->relpersistence;
createStmt = makeNode(CreateStmt);
createStmt->relation = newPartName;
createStmt->if_not_exists = false;
tlc = makeNode(TableLikeClause);
- tlc->relation = modelRelName;
+ tlc->relation = makeRangeVar(get_namespace_name(RelationGetNamespace(modelRel)),
+ RelationGetRelationName(modelRel), -1);
/*
* Indexes will be inherited on "attach new partitions" stage, after data
NULL,
None_Receiver,
NULL);
+
+ /*
+ * Open the new partition with no lock, because we already have
+ * AccessExclusiveLock placed there after creation.
+ */
+ newRel = table_openrv(newPartName, NoLock);
+
+ /*
+ * We intended to create the partition with the same persistence as the
+ * parent table, but we still need to recheck because that might be
+ * affected by the search_path. If the parent is permanent, so must be
+ * all of its partitions.
+ */
+ if (modelRel->rd_rel->relpersistence != RELPERSISTENCE_TEMP &&
+ newRel->rd_rel->relpersistence == RELPERSISTENCE_TEMP)
+ ereport(ERROR,
+ (errcode(ERRCODE_WRONG_OBJECT_TYPE),
+ errmsg("cannot create a temporary relation as partition of permanent relation \"%s\"",
+ RelationGetRelationName(modelRel))));
+
+ /* Permanent rels cannot be partitions belonging to temporary parent */
+ if (newRel->rd_rel->relpersistence != RELPERSISTENCE_TEMP &&
+ modelRel->rd_rel->relpersistence == RELPERSISTENCE_TEMP)
+ ereport(ERROR,
+ (errcode(ERRCODE_WRONG_OBJECT_TYPE),
+ errmsg("cannot create a permanent relation as partition of temporary relation \"%s\"",
+ RelationGetRelationName(modelRel))));
+
+ return newRel;
}
/*
char tmpRelName[NAMEDATALEN];
List *newPartRels = NIL;
ObjectAddress object;
- RangeVar *parentName;
Oid defaultPartOid;
defaultPartOid = get_default_oid_from_partdesc(RelationGetPartitionDesc(rel, true));
}
/* Create new partitions (like split partition), without indexes. */
- parentName = makeRangeVar(get_namespace_name(RelationGetNamespace(rel)),
- RelationGetRelationName(rel), -1);
foreach(listptr, cmd->partlist)
{
SinglePartitionSpec *sps = (SinglePartitionSpec *) lfirst(listptr);
Relation newPartRel;
- createPartitionTable(sps->name, parentName, context);
-
- /* Open the new partition and acquire exclusive lock on it. */
- newPartRel = table_openrv(sps->name, AccessExclusiveLock);
-
+ newPartRel = createPartitionTable(sps->name, rel, context);
newPartRels = lappend(newPartRels, newPartRel);
}
DetachPartitionFinalize(rel, mergingPartition, false, defaultPartOid);
}
- createPartitionTable(cmd->name,
- makeRangeVar(get_namespace_name(RelationGetNamespace(rel)),
- RelationGetRelationName(rel), -1),
- context);
-
- /*
- * Open the new partition and acquire exclusive lock on it. This will
- * stop all the operations with partitioned table. This might seem
- * excessive, but this is the way we make sure nobody is planning queries
- * involving merging partitions.
- */
- newPartRel = table_openrv(cmd->name, AccessExclusiveLock);
+ /* Create table for new partition, use partitioned table as model. */
+ newPartRel = createPartitionTable(cmd->name, rel, context);
/* Copy data from merged partitions to new partition. */
moveMergedTablesRows(rel, mergingPartitionsList, newPartRel);
-- Tests for "ALTER TABLE ... MERGE PARTITIONS ..." command
--
CREATE SCHEMA partitions_merge_schema;
+CREATE SCHEMA partitions_merge_schema2;
SET search_path = partitions_merge_schema, public;
--
-- BY RANGE partitioning
-- (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: lower bound of partition "sales_jan2022" conflicts with upper bound of previous partition "sales_dec2021"
--- NO ERROR: test for custom partitions order
-ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_jan2022) INTO sales_jan_feb_mar2022;
+-- NO ERROR: test for custom partitions order, source partitions not in the search_path
+SET search_path = partitions_merge_schema2, public;
+ALTER TABLE partitions_merge_schema.sales_range MERGE PARTITIONS (
+ partitions_merge_schema.sales_feb2022,
+ partitions_merge_schema.sales_mar2022,
+ partitions_merge_schema.sales_jan2022) INTO sales_jan_feb_mar2022;
+SET search_path = partitions_merge_schema, public;
SELECT c.oid::pg_catalog.regclass, c.relkind, inhdetachpending, pg_catalog.pg_get_expr(c.relpartbound, c.oid)
FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
WHERE c.oid = i.inhrelid AND i.inhparent = 'sales_range'::regclass
ORDER BY pg_catalog.pg_get_expr(c.relpartbound, c.oid) = 'DEFAULT', c.oid::pg_catalog.regclass::pg_catalog.text;
- oid | relkind | inhdetachpending | pg_get_expr
------------------------+---------+------------------+--------------------------------------------------
- sales_apr2022 | p | f | FOR VALUES FROM ('04-01-2022') TO ('05-01-2022')
- sales_dec2021 | r | f | FOR VALUES FROM ('12-01-2021') TO ('12-31-2021')
- sales_jan_feb_mar2022 | r | f | FOR VALUES FROM ('01-01-2022') TO ('04-01-2022')
- sales_others | r | f | DEFAULT
+ oid | relkind | inhdetachpending | pg_get_expr
+------------------------------------------------+---------+------------------+--------------------------------------------------
+ partitions_merge_schema2.sales_jan_feb_mar2022 | r | f | FOR VALUES FROM ('01-01-2022') TO ('04-01-2022')
+ sales_apr2022 | p | f | FOR VALUES FROM ('04-01-2022') TO ('05-01-2022')
+ sales_dec2021 | r | f | FOR VALUES FROM ('12-01-2021') TO ('12-31-2021')
+ sales_others | r | f | DEFAULT
(4 rows)
DROP TABLE sales_range;
sales_others | r | f | DEFAULT
(5 rows)
-ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_apr2022) INTO sales_feb_mar_apr2022;
+-- check schema-qualified name of the new partition
+ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_apr2022) INTO partitions_merge_schema2.sales_feb_mar_apr2022;
-- show partitions with conditions:
SELECT c.oid::pg_catalog.regclass, c.relkind, inhdetachpending, pg_catalog.pg_get_expr(c.relpartbound, c.oid)
FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
WHERE c.oid = i.inhrelid AND i.inhparent = 'sales_range'::regclass
ORDER BY pg_catalog.pg_get_expr(c.relpartbound, c.oid) = 'DEFAULT', c.oid::pg_catalog.regclass::pg_catalog.text;
- oid | relkind | inhdetachpending | pg_get_expr
------------------------+---------+------------------+--------------------------------------------------
- sales_feb_mar_apr2022 | r | f | FOR VALUES FROM ('02-01-2022') TO ('05-01-2022')
- sales_jan2022 | r | f | FOR VALUES FROM ('01-01-2022') TO ('02-01-2022')
- sales_others | r | f | DEFAULT
+ oid | relkind | inhdetachpending | pg_get_expr
+------------------------------------------------+---------+------------------+--------------------------------------------------
+ partitions_merge_schema2.sales_feb_mar_apr2022 | r | f | FOR VALUES FROM ('02-01-2022') TO ('05-01-2022')
+ sales_jan2022 | r | f | FOR VALUES FROM ('01-01-2022') TO ('02-01-2022')
+ sales_others | r | f | DEFAULT
(3 rows)
-SELECT * FROM pg_indexes WHERE tablename = 'sales_feb_mar_apr2022' and schemaname = 'partitions_merge_schema';
- schemaname | tablename | indexname | tablespace | indexdef
--------------------------+-----------------------+--------------------------------------+------------+-----------------------------------------------------------------------------------------------------------------------------
- partitions_merge_schema | sales_feb_mar_apr2022 | sales_feb_mar_apr2022_sales_date_idx | | CREATE INDEX sales_feb_mar_apr2022_sales_date_idx ON partitions_merge_schema.sales_feb_mar_apr2022 USING btree (sales_date)
+SELECT * FROM pg_indexes WHERE tablename = 'sales_feb_mar_apr2022' and schemaname = 'partitions_merge_schema2';
+ schemaname | tablename | indexname | tablespace | indexdef
+--------------------------+-----------------------+--------------------------------------+------------+------------------------------------------------------------------------------------------------------------------------------
+ partitions_merge_schema2 | sales_feb_mar_apr2022 | sales_feb_mar_apr2022_sales_date_idx | | CREATE INDEX sales_feb_mar_apr2022_sales_date_idx ON partitions_merge_schema2.sales_feb_mar_apr2022 USING btree (sales_date)
(1 row)
SELECT * FROM sales_range;
13 | Gandi | 377 | 01-09-2022
(3 rows)
-SELECT * FROM sales_feb_mar_apr2022;
+SELECT * FROM partitions_merge_schema2.sales_feb_mar_apr2022;
salesman_id | salesman_name | sales_amount | sales_date
-------------+---------------+--------------+------------
2 | Smirnoff | 500 | 02-10-2022
-- Use indexscan for testing indexes
SET enable_seqscan = OFF;
-SELECT * FROM sales_feb_mar_apr2022 where sales_date > '2022-01-01';
+SELECT * FROM partitions_merge_schema2.sales_feb_mar_apr2022 where sales_date > '2022-01-01';
salesman_id | salesman_name | sales_amount | sales_date
-------------+---------------+--------------+------------
2 | Smirnoff | 500 | 02-10-2022
DROP TABLE t2;
DROP TABLE t1;
--
+-- Try to MERGE partitions of temporary table.
+--
+CREATE TEMP TABLE t (i int) PARTITION BY RANGE (i);
+CREATE TEMP TABLE tp_0_1 PARTITION OF t FOR VALUES FROM (0) TO (1);
+CREATE TEMP TABLE tp_1_2 PARTITION OF t FOR VALUES FROM (1) TO (2);
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+ oid | pg_get_expr | relpersistence
+--------+----------------------------+----------------
+ tp_0_1 | FOR VALUES FROM (0) TO (1) | t
+ tp_1_2 | FOR VALUES FROM (1) TO (2) | t
+(2 rows)
+
+ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
+-- Partition should be temporary.
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+ oid | pg_get_expr | relpersistence
+--------+----------------------------+----------------
+ tp_0_2 | FOR VALUES FROM (0) TO (2) | t
+(1 row)
+
+DROP TABLE t;
+--
-- Check the partition index name if the partition name is the same as one
-- of the merged partitions.
--
DROP TABLE t;
--
+-- Try mixing permanent and temporary partitions.
+--
+SET search_path = partitions_merge_schema, pg_temp, public;
+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);
+SELECT c.oid::pg_catalog.regclass, c.relpersistence FROM pg_catalog.pg_class c WHERE c.oid = 't'::regclass;
+ oid | relpersistence
+-----+----------------
+ t | p
+(1 row)
+
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+ oid | pg_get_expr | relpersistence
+--------+----------------------------+----------------
+ tp_0_1 | FOR VALUES FROM (0) TO (1) | p
+ tp_1_2 | FOR VALUES FROM (1) TO (2) | p
+(2 rows)
+
+SET search_path = pg_temp, partitions_merge_schema, public;
+-- Can't merge persistent partitions into a temporary partition
+ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
+ERROR: cannot create a temporary relation as partition of permanent relation "t"
+SET search_path = partitions_merge_schema, public;
+-- Can't merge persistent partitions into a temporary partition
+ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO pg_temp.tp_0_2;
+ERROR: cannot create a temporary relation as partition of permanent relation "t"
+DROP TABLE t;
+SET search_path = pg_temp, partitions_merge_schema, public;
+BEGIN;
+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);
+SELECT c.oid::pg_catalog.regclass, c.relpersistence FROM pg_catalog.pg_class c WHERE c.oid = 't'::regclass;
+ oid | relpersistence
+-----+----------------
+ t | t
+(1 row)
+
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+ oid | pg_get_expr | relpersistence
+--------+----------------------------+----------------
+ tp_0_1 | FOR VALUES FROM (0) TO (1) | t
+ tp_1_2 | FOR VALUES FROM (1) TO (2) | t
+(2 rows)
+
+SET search_path = partitions_merge_schema, pg_temp, public;
+-- Can't merge temporary partitions into a persistent partition
+ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
+ROLLBACK;
+RESET search_path;
+--
DROP SCHEMA partitions_merge_schema;
+DROP SCHEMA partitions_merge_schema2;
-- Tests for "ALTER TABLE ... SPLIT PARTITION ..." command
--
CREATE SCHEMA partition_split_schema;
+CREATE SCHEMA partition_split_schema2;
SET search_path = partition_split_schema, public;
--
-- BY RANGE partitioning
ERROR: lower bound of partition "sales_feb2022" is not equal to lower bound of split partition
LINE 2: (PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-02') TO...
^
+-- Check the source partition not in the search path
+SET search_path = partition_split_schema2, public;
+ALTER TABLE partition_split_schema.sales_range
+SPLIT PARTITION partition_split_schema.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 ('2022-05-01'));
+SET search_path = partition_split_schema, public;
+\d+ sales_range
+ Partitioned table "partition_split_schema.sales_range"
+ Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
+---------------+-----------------------+-----------+----------+---------+----------+--------------+-------------
+ salesman_id | integer | | | | plain | |
+ salesman_name | character varying(30) | | | | extended | |
+ sales_amount | integer | | | | plain | |
+ sales_date | date | | | | plain | |
+Partition key: RANGE (sales_date)
+Partitions: partition_split_schema2.sales_apr2022 FOR VALUES FROM ('04-01-2022') TO ('05-01-2022'),
+ partition_split_schema2.sales_feb2022 FOR VALUES FROM ('02-01-2022') TO ('03-01-2022'),
+ partition_split_schema2.sales_mar2022 FOR VALUES FROM ('03-01-2022') TO ('04-01-2022'),
+ sales_jan2022 FOR VALUES FROM ('01-01-2022') TO ('02-01-2022')
+
DROP TABLE sales_range;
DROP TABLE sales_others;
--
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;
+-- Split partition, also check schema qualification of new partitions
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 partition_split_schema.sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
+ PARTITION partition_split_schema2.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'));
+\d+ sales_range
+ Partitioned table "partition_split_schema.sales_range"
+ Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
+---------------+-----------------------+-----------+----------+---------+----------+--------------+-------------
+ salesman_id | integer | | | | plain | |
+ salesman_name | character varying(30) | | | | extended | |
+ sales_amount | integer | | | | plain | |
+ sales_date | date | | | | plain | |
+Partition key: RANGE (sales_date)
+Partitions: partition_split_schema2.sales_mar2022 FOR VALUES FROM ('03-01-2022') TO ('04-01-2022'),
+ sales_apr2022 FOR VALUES FROM ('04-01-2022') TO ('05-01-2022'),
+ sales_feb2022 FOR VALUES FROM ('02-01-2022') TO ('03-01-2022'),
+ sales_jan2022 FOR VALUES FROM ('01-01-2022') TO ('02-01-2022'),
+ sales_others DEFAULT
+
INSERT INTO sales_range VALUES (1, 'May', 1000, '2022-01-31');
INSERT INTO sales_range VALUES (2, 'Smirnoff', 500, '2022-02-10');
INSERT INTO sales_range VALUES (3, 'Ford', 2000, '2022-04-30');
8 | Ericsson | 185 | 02-23-2022
(3 rows)
-SELECT * FROM sales_mar2022;
+SELECT * FROM partition_split_schema2.sales_mar2022;
salesman_id | salesman_name | sales_amount | sales_date
-------------+---------------+--------------+------------
7 | Li | 175 | 03-08-2022
DROP TABLE t2;
DROP TABLE t1;
--
+-- Try to SPLIT partition of temporary table.
+--
+CREATE TEMP TABLE t (i int) PARTITION BY RANGE (i);
+CREATE TEMP TABLE tp_0_2 PARTITION OF t FOR VALUES FROM (0) TO (2);
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+ oid | pg_get_expr | relpersistence
+--------+----------------------------+----------------
+ tp_0_2 | FOR VALUES FROM (0) TO (2) | t
+(1 row)
+
+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));
+-- Partitions should be temporary.
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+ oid | pg_get_expr | relpersistence
+--------+----------------------------+----------------
+ tp_0_1 | FOR VALUES FROM (0) TO (1) | t
+ tp_1_2 | FOR VALUES FROM (1) TO (2) | t
+(2 rows)
+
+DROP TABLE t;
+--
DROP SCHEMA partition_split_schema;
+DROP SCHEMA partition_split_schema2;
--
CREATE SCHEMA partitions_merge_schema;
+CREATE SCHEMA partitions_merge_schema2;
SET search_path = partitions_merge_schema, public;
--
-- (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;
--- NO ERROR: test for custom partitions order
-ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_jan2022) INTO sales_jan_feb_mar2022;
+-- NO ERROR: test for custom partitions order, source partitions not in the search_path
+SET search_path = partitions_merge_schema2, public;
+ALTER TABLE partitions_merge_schema.sales_range MERGE PARTITIONS (
+ partitions_merge_schema.sales_feb2022,
+ partitions_merge_schema.sales_mar2022,
+ partitions_merge_schema.sales_jan2022) INTO sales_jan_feb_mar2022;
+SET search_path = partitions_merge_schema, public;
SELECT c.oid::pg_catalog.regclass, c.relkind, inhdetachpending, pg_catalog.pg_get_expr(c.relpartbound, c.oid)
FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
WHERE c.oid = i.inhrelid AND i.inhparent = 'sales_range'::regclass
ORDER BY pg_catalog.pg_get_expr(c.relpartbound, c.oid) = 'DEFAULT', c.oid::pg_catalog.regclass::pg_catalog.text;
-ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_apr2022) INTO sales_feb_mar_apr2022;
+-- check schema-qualified name of the new partition
+ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022, sales_mar2022, sales_apr2022) INTO partitions_merge_schema2.sales_feb_mar_apr2022;
-- show partitions with conditions:
SELECT c.oid::pg_catalog.regclass, c.relkind, inhdetachpending, pg_catalog.pg_get_expr(c.relpartbound, c.oid)
WHERE c.oid = i.inhrelid AND i.inhparent = 'sales_range'::regclass
ORDER BY pg_catalog.pg_get_expr(c.relpartbound, c.oid) = 'DEFAULT', c.oid::pg_catalog.regclass::pg_catalog.text;
-SELECT * FROM pg_indexes WHERE tablename = 'sales_feb_mar_apr2022' and schemaname = 'partitions_merge_schema';
+SELECT * FROM pg_indexes WHERE tablename = 'sales_feb_mar_apr2022' and schemaname = 'partitions_merge_schema2';
SELECT * FROM sales_range;
SELECT * FROM sales_jan2022;
-SELECT * FROM sales_feb_mar_apr2022;
+SELECT * FROM partitions_merge_schema2.sales_feb_mar_apr2022;
SELECT * FROM sales_others;
-- Use indexscan for testing indexes
SET enable_seqscan = OFF;
-SELECT * FROM sales_feb_mar_apr2022 where sales_date > '2022-01-01';
+SELECT * FROM partitions_merge_schema2.sales_feb_mar_apr2022 where sales_date > '2022-01-01';
RESET enable_seqscan;
DROP TABLE t2;
DROP TABLE t1;
+--
+-- Try to MERGE partitions of temporary table.
+--
+CREATE TEMP TABLE t (i int) PARTITION BY RANGE (i);
+CREATE TEMP TABLE tp_0_1 PARTITION OF t FOR VALUES FROM (0) TO (1);
+CREATE TEMP TABLE tp_1_2 PARTITION OF t FOR VALUES FROM (1) TO (2);
+
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+
+ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
+
+-- Partition should be temporary.
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+
+DROP TABLE t;
+
--
-- Check the partition index name if the partition name is the same as one
-- of the merged partitions.
DROP TABLE t;
+--
+-- Try mixing permanent and temporary partitions.
+--
+SET search_path = partitions_merge_schema, pg_temp, public;
+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);
+
+SELECT c.oid::pg_catalog.regclass, c.relpersistence FROM pg_catalog.pg_class c WHERE c.oid = 't'::regclass;
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+
+SET search_path = pg_temp, partitions_merge_schema, public;
+
+-- Can't merge persistent partitions into a temporary partition
+ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
+
+SET search_path = partitions_merge_schema, public;
+
+-- Can't merge persistent partitions into a temporary partition
+ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO pg_temp.tp_0_2;
+DROP TABLE t;
+
+SET search_path = pg_temp, partitions_merge_schema, public;
+
+BEGIN;
+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);
+
+SELECT c.oid::pg_catalog.regclass, c.relpersistence FROM pg_catalog.pg_class c WHERE c.oid = 't'::regclass;
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+
+SET search_path = partitions_merge_schema, pg_temp, public;
+
+-- Can't merge temporary partitions into a persistent partition
+ALTER TABLE t MERGE PARTITIONS (tp_0_1, tp_1_2) INTO tp_0_2;
+ROLLBACK;
+
+RESET search_path;
+
--
DROP SCHEMA partitions_merge_schema;
+DROP SCHEMA partitions_merge_schema2;
--
CREATE SCHEMA partition_split_schema;
+CREATE SCHEMA partition_split_schema2;
SET search_path = partition_split_schema, public;
--
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'));
+-- Check the source partition not in the search path
+SET search_path = partition_split_schema2, public;
+ALTER TABLE partition_split_schema.sales_range
+SPLIT PARTITION partition_split_schema.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 ('2022-05-01'));
+SET search_path = partition_split_schema, public;
+\d+ sales_range
+
DROP TABLE sales_range;
DROP TABLE sales_others;
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;
+-- Split partition, also check schema qualification of new partitions
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 partition_split_schema.sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
+ PARTITION partition_split_schema2.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'));
+\d+ sales_range
INSERT INTO sales_range VALUES (1, 'May', 1000, '2022-01-31');
INSERT INTO sales_range VALUES (2, 'Smirnoff', 500, '2022-02-10');
SELECT * FROM sales_range;
SELECT * FROM sales_jan2022;
SELECT * FROM sales_feb2022;
-SELECT * FROM sales_mar2022;
+SELECT * FROM partition_split_schema2.sales_mar2022;
SELECT * FROM sales_apr2022;
SELECT * FROM sales_others;
DROP TABLE t2;
DROP TABLE t1;
+--
+-- Try to SPLIT partition of temporary table.
+--
+CREATE TEMP TABLE t (i int) PARTITION BY RANGE (i);
+CREATE TEMP TABLE tp_0_2 PARTITION OF t FOR VALUES FROM (0) TO (2);
+
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+
+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));
+
+-- Partitions should be temporary.
+SELECT c.oid::pg_catalog.regclass, pg_catalog.pg_get_expr(c.relpartbound, c.oid), c.relpersistence
+ FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i
+ 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;
+
+DROP TABLE t;
+
--
DROP SCHEMA partition_split_schema;
+DROP SCHEMA partition_split_schema2;
projects / postgresql.git / commitdiff