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49 lines
1.3 KiB
SQL
49 lines
1.3 KiB
SQL
SET enable_seqscan = off;
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-- hamming
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CREATE TABLE t (val bit(3));
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INSERT INTO t (val) VALUES (B'000'), (B'100'), (B'111'), (NULL);
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CREATE INDEX ON t USING ivfflat (val bit_hamming_ops) WITH (lists = 1);
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INSERT INTO t (val) VALUES (B'110');
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SELECT * FROM t ORDER BY val <~> B'111';
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SELECT COUNT(*) FROM (SELECT * FROM t ORDER BY val <~> (SELECT NULL::bit)) t2;
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DROP TABLE t;
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-- varbit
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CREATE TABLE t (val varbit(3));
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CREATE INDEX ON t USING ivfflat (val bit_hamming_ops) WITH (lists = 1);
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CREATE INDEX ON t USING ivfflat ((val::bit(3)) bit_hamming_ops) WITH (lists = 1);
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CREATE INDEX ON t USING ivfflat ((val::bit(64001)) bit_hamming_ops) WITH (lists = 1);
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CREATE INDEX ON t USING ivfflat ((val::bit(2)) bit_hamming_ops) WITH (lists = 5);
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DROP TABLE t;
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-- dimensions
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CREATE TABLE t (val bit(64000));
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CREATE INDEX ON t USING ivfflat (val bit_hamming_ops);
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DROP TABLE t;
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CREATE TABLE t (val bit(64001));
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CREATE INDEX ON t USING ivfflat (val bit_hamming_ops);
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DROP TABLE t;
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-- memory
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SET maintenance_work_mem = '1MB';
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CREATE TABLE t (val bit(64000));
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CREATE INDEX ON t USING ivfflat (val bit_hamming_ops);
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DROP TABLE t;
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RESET maintenance_work_mem;
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SET maintenance_work_mem = '29MB';
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CREATE TABLE t (val bit(64000));
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INSERT INTO t (val) VALUES (B'0'::bit(64000));
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CREATE INDEX ON t USING ivfflat (val bit_hamming_ops);
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DROP TABLE t;
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RESET maintenance_work_mem;
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