91 lines
3.1 KiB
SQL
91 lines
3.1 KiB
SQL
--
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-- Hash partitioning.
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--
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-- Use hand-rolled hash functions and operator classes to get predictable
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-- result on different machines. See the definitions of
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-- part_test_int4_ops and part_test_text_ops in test_setup.sql.
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CREATE TABLE mchash (a int, b text, c jsonb)
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PARTITION BY HASH (a part_test_int4_ops, b part_test_text_ops);
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CREATE TABLE mchash1
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PARTITION OF mchash FOR VALUES WITH (MODULUS 4, REMAINDER 0);
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-- invalid OID, no such table
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SELECT satisfies_hash_partition(0, 4, 0, NULL);
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-- not partitioned
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SELECT satisfies_hash_partition('tenk1'::regclass, 4, 0, NULL);
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-- partition rather than the parent
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SELECT satisfies_hash_partition('mchash1'::regclass, 4, 0, NULL);
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-- invalid modulus
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SELECT satisfies_hash_partition('mchash'::regclass, 0, 0, NULL);
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-- remainder too small
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SELECT satisfies_hash_partition('mchash'::regclass, 1, -1, NULL);
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-- remainder too large
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SELECT satisfies_hash_partition('mchash'::regclass, 1, 1, NULL);
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-- modulus is null
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SELECT satisfies_hash_partition('mchash'::regclass, NULL, 0, NULL);
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-- remainder is null
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SELECT satisfies_hash_partition('mchash'::regclass, 4, NULL, NULL);
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-- too many arguments
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SELECT satisfies_hash_partition('mchash'::regclass, 4, 0, NULL::int, NULL::text, NULL::json);
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-- too few arguments
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SELECT satisfies_hash_partition('mchash'::regclass, 3, 1, NULL::int);
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-- wrong argument type
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SELECT satisfies_hash_partition('mchash'::regclass, 2, 1, NULL::int, NULL::int);
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-- ok, should be false
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SELECT satisfies_hash_partition('mchash'::regclass, 4, 0, 0, ''::text);
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-- ok, should be true
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SELECT satisfies_hash_partition('mchash'::regclass, 4, 0, 2, ''::text);
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-- argument via variadic syntax, should fail because not all partitioning
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-- columns are of the correct type
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SELECT satisfies_hash_partition('mchash'::regclass, 2, 1,
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variadic array[1,2]::int[]);
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-- multiple partitioning columns of the same type
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CREATE TABLE mcinthash (a int, b int, c jsonb)
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PARTITION BY HASH (a part_test_int4_ops, b part_test_int4_ops);
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-- now variadic should work, should be false
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SELECT satisfies_hash_partition('mcinthash'::regclass, 4, 0,
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variadic array[0, 0]);
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-- should be true
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SELECT satisfies_hash_partition('mcinthash'::regclass, 4, 0,
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variadic array[0, 1]);
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-- wrong length
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SELECT satisfies_hash_partition('mcinthash'::regclass, 4, 0,
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variadic array[]::int[]);
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-- wrong type
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SELECT satisfies_hash_partition('mcinthash'::regclass, 4, 0,
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variadic array[now(), now()]);
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-- check satisfies_hash_partition passes correct collation
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create table text_hashp (a text) partition by hash (a);
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create table text_hashp0 partition of text_hashp for values with (modulus 2, remainder 0);
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create table text_hashp1 partition of text_hashp for values with (modulus 2, remainder 1);
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-- The result here should always be true, because 'xxx' must belong to
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-- one of the two defined partitions
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select satisfies_hash_partition('text_hashp'::regclass, 2, 0, 'xxx'::text) OR
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satisfies_hash_partition('text_hashp'::regclass, 2, 1, 'xxx'::text) AS satisfies;
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-- cleanup
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DROP TABLE mchash;
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DROP TABLE mcinthash;
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DROP TABLE text_hashp;
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