115 lines
4.4 KiB
Plaintext
115 lines
4.4 KiB
Plaintext
--
|
|
-- Hash partitioning.
|
|
--
|
|
-- Use hand-rolled hash functions and operator classes to get predictable
|
|
-- result on different machines. See the definitions of
|
|
-- part_part_test_int4_ops and part_test_text_ops in insert.sql.
|
|
CREATE TABLE mchash (a int, b text, c jsonb)
|
|
PARTITION BY HASH (a part_test_int4_ops, b part_test_text_ops);
|
|
CREATE TABLE mchash1
|
|
PARTITION OF mchash FOR VALUES WITH (MODULUS 4, REMAINDER 0);
|
|
-- invalid OID, no such table
|
|
SELECT satisfies_hash_partition(0, 4, 0, NULL);
|
|
ERROR: could not open relation with OID 0
|
|
-- not partitioned
|
|
SELECT satisfies_hash_partition('tenk1'::regclass, 4, 0, NULL);
|
|
ERROR: "tenk1" is not a hash partitioned table
|
|
-- partition rather than the parent
|
|
SELECT satisfies_hash_partition('mchash1'::regclass, 4, 0, NULL);
|
|
ERROR: "mchash1" is not a hash partitioned table
|
|
-- invalid modulus
|
|
SELECT satisfies_hash_partition('mchash'::regclass, 0, 0, NULL);
|
|
ERROR: modulus for hash partition must be an integer value greater than zero
|
|
-- remainder too small
|
|
SELECT satisfies_hash_partition('mchash'::regclass, 1, -1, NULL);
|
|
ERROR: remainder for hash partition must be an integer value greater than or equal to zero
|
|
-- remainder too large
|
|
SELECT satisfies_hash_partition('mchash'::regclass, 1, 1, NULL);
|
|
ERROR: remainder for hash partition must be less than modulus
|
|
-- modulus is null
|
|
SELECT satisfies_hash_partition('mchash'::regclass, NULL, 0, NULL);
|
|
satisfies_hash_partition
|
|
--------------------------
|
|
f
|
|
(1 row)
|
|
|
|
-- remainder is null
|
|
SELECT satisfies_hash_partition('mchash'::regclass, 4, NULL, NULL);
|
|
satisfies_hash_partition
|
|
--------------------------
|
|
f
|
|
(1 row)
|
|
|
|
-- too many arguments
|
|
SELECT satisfies_hash_partition('mchash'::regclass, 4, 0, NULL::int, NULL::text, NULL::json);
|
|
ERROR: number of partitioning columns (2) does not match number of partition keys provided (3)
|
|
-- too few arguments
|
|
SELECT satisfies_hash_partition('mchash'::regclass, 3, 1, NULL::int);
|
|
ERROR: number of partitioning columns (2) does not match number of partition keys provided (1)
|
|
-- wrong argument type
|
|
SELECT satisfies_hash_partition('mchash'::regclass, 2, 1, NULL::int, NULL::int);
|
|
ERROR: column 2 of the partition key has type text, but supplied value is of type integer
|
|
-- ok, should be false
|
|
SELECT satisfies_hash_partition('mchash'::regclass, 4, 0, 0, ''::text);
|
|
satisfies_hash_partition
|
|
--------------------------
|
|
f
|
|
(1 row)
|
|
|
|
-- ok, should be true
|
|
SELECT satisfies_hash_partition('mchash'::regclass, 4, 0, 2, ''::text);
|
|
satisfies_hash_partition
|
|
--------------------------
|
|
t
|
|
(1 row)
|
|
|
|
-- argument via variadic syntax, should fail because not all partitioning
|
|
-- columns are of the correct type
|
|
SELECT satisfies_hash_partition('mchash'::regclass, 2, 1,
|
|
variadic array[1,2]::int[]);
|
|
ERROR: column 2 of the partition key has type "text", but supplied value is of type "integer"
|
|
-- multiple partitioning columns of the same type
|
|
CREATE TABLE mcinthash (a int, b int, c jsonb)
|
|
PARTITION BY HASH (a part_test_int4_ops, b part_test_int4_ops);
|
|
-- now variadic should work, should be false
|
|
SELECT satisfies_hash_partition('mcinthash'::regclass, 4, 0,
|
|
variadic array[0, 0]);
|
|
satisfies_hash_partition
|
|
--------------------------
|
|
f
|
|
(1 row)
|
|
|
|
-- should be true
|
|
SELECT satisfies_hash_partition('mcinthash'::regclass, 4, 0,
|
|
variadic array[0, 1]);
|
|
satisfies_hash_partition
|
|
--------------------------
|
|
t
|
|
(1 row)
|
|
|
|
-- wrong length
|
|
SELECT satisfies_hash_partition('mcinthash'::regclass, 4, 0,
|
|
variadic array[]::int[]);
|
|
ERROR: number of partitioning columns (2) does not match number of partition keys provided (0)
|
|
-- wrong type
|
|
SELECT satisfies_hash_partition('mcinthash'::regclass, 4, 0,
|
|
variadic array[now(), now()]);
|
|
ERROR: column 1 of the partition key has type "integer", but supplied value is of type "timestamp with time zone"
|
|
-- check satisfies_hash_partition passes correct collation
|
|
create table text_hashp (a text) partition by hash (a);
|
|
create table text_hashp0 partition of text_hashp for values with (modulus 2, remainder 0);
|
|
create table text_hashp1 partition of text_hashp for values with (modulus 2, remainder 1);
|
|
-- The result here should always be true, because 'xxx' must belong to
|
|
-- one of the two defined partitions
|
|
select satisfies_hash_partition('text_hashp'::regclass, 2, 0, 'xxx'::text) OR
|
|
satisfies_hash_partition('text_hashp'::regclass, 2, 1, 'xxx'::text) AS satisfies;
|
|
satisfies
|
|
-----------
|
|
t
|
|
(1 row)
|
|
|
|
-- cleanup
|
|
DROP TABLE mchash;
|
|
DROP TABLE mcinthash;
|
|
DROP TABLE text_hashp;
|