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f4cd7102b5
Mostly for completeness, but I believe there are cases to use that in multicolumn GIN indexes. Bump btree_gin module version Author: Matheus Oliveira Reviewed by: Tomas Vondra Discussion: https://www.postgresql.org/message-id/flat/CAJghg4LMJf6Z13fnZD-MBNiGxzd0cA2=F3TDjNkX3eQH58hktQ@mail.gmail.com
105 lines
4.3 KiB
Plaintext
105 lines
4.3 KiB
Plaintext
set enable_seqscan=off;
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CREATE TABLE test_uuid (
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i uuid
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);
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INSERT INTO test_uuid VALUES
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( '00000000-0000-0000-0000-000000000000' ),
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( '299bc99f-2f79-4e3e-bfea-2cbfd62a7c27' ),
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( '6264af33-0d43-4337-bf4e-43509b8a4be8' ),
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( 'ce41c936-6acb-4feb-8c91-852a673e5a5c' ),
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( 'd2ce731f-f2a8-4a2b-be37-8f0ba637427f' ),
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( 'ffffffff-ffff-ffff-ffff-ffffffffffff' )
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;
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CREATE INDEX idx_uuid ON test_uuid USING gin (i);
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SELECT * FROM test_uuid WHERE i<'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid ORDER BY i;
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i
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--------------------------------------
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00000000-0000-0000-0000-000000000000
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299bc99f-2f79-4e3e-bfea-2cbfd62a7c27
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6264af33-0d43-4337-bf4e-43509b8a4be8
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(3 rows)
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SELECT * FROM test_uuid WHERE i<='ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid ORDER BY i;
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i
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--------------------------------------
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00000000-0000-0000-0000-000000000000
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299bc99f-2f79-4e3e-bfea-2cbfd62a7c27
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6264af33-0d43-4337-bf4e-43509b8a4be8
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ce41c936-6acb-4feb-8c91-852a673e5a5c
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(4 rows)
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SELECT * FROM test_uuid WHERE i='ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid ORDER BY i;
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i
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--------------------------------------
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ce41c936-6acb-4feb-8c91-852a673e5a5c
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(1 row)
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SELECT * FROM test_uuid WHERE i>='ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid ORDER BY i;
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i
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--------------------------------------
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ce41c936-6acb-4feb-8c91-852a673e5a5c
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d2ce731f-f2a8-4a2b-be37-8f0ba637427f
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ffffffff-ffff-ffff-ffff-ffffffffffff
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(3 rows)
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SELECT * FROM test_uuid WHERE i>'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid ORDER BY i;
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i
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--------------------------------------
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d2ce731f-f2a8-4a2b-be37-8f0ba637427f
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ffffffff-ffff-ffff-ffff-ffffffffffff
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(2 rows)
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EXPLAIN (COSTS OFF) SELECT * FROM test_uuid WHERE i<'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid ORDER BY i;
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QUERY PLAN
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------------------------------------------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_uuid
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Recheck Cond: (i < 'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid)
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-> Bitmap Index Scan on idx_uuid
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Index Cond: (i < 'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid)
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(6 rows)
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EXPLAIN (COSTS OFF) SELECT * FROM test_uuid WHERE i<='ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid ORDER BY i;
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QUERY PLAN
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-------------------------------------------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_uuid
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Recheck Cond: (i <= 'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid)
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-> Bitmap Index Scan on idx_uuid
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Index Cond: (i <= 'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid)
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(6 rows)
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EXPLAIN (COSTS OFF) SELECT * FROM test_uuid WHERE i='ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid ORDER BY i;
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QUERY PLAN
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------------------------------------------------------------------------
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Bitmap Heap Scan on test_uuid
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Recheck Cond: (i = 'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid)
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-> Bitmap Index Scan on idx_uuid
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Index Cond: (i = 'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid)
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(4 rows)
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EXPLAIN (COSTS OFF) SELECT * FROM test_uuid WHERE i>='ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid ORDER BY i;
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QUERY PLAN
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-------------------------------------------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_uuid
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Recheck Cond: (i >= 'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid)
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-> Bitmap Index Scan on idx_uuid
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Index Cond: (i >= 'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid)
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(6 rows)
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EXPLAIN (COSTS OFF) SELECT * FROM test_uuid WHERE i>'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid ORDER BY i;
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QUERY PLAN
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------------------------------------------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_uuid
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Recheck Cond: (i > 'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid)
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-> Bitmap Index Scan on idx_uuid
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Index Cond: (i > 'ce41c936-6acb-4feb-8c91-852a673e5a5c'::uuid)
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(6 rows)
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