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52 lines
1.2 KiB
Plaintext
52 lines
1.2 KiB
Plaintext
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 hnsw (val bit_hamming_ops);
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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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val
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-----
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111
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110
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100
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000
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(4 rows)
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SELECT COUNT(*) FROM (SELECT * FROM t ORDER BY val <~> (SELECT NULL::bit)) t2;
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count
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-------
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4
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(1 row)
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DROP TABLE t;
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-- jaccard
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CREATE TABLE t (val bit(4));
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INSERT INTO t (val) VALUES (B'0000'), (B'1100'), (B'1111'), (NULL);
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CREATE INDEX ON t USING hnsw (val bit_jaccard_ops);
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INSERT INTO t (val) VALUES (B'1110');
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SELECT * FROM t ORDER BY val <%> B'1111';
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val
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------
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1111
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1110
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1100
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0000
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(4 rows)
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SELECT COUNT(*) FROM (SELECT * FROM t ORDER BY val <%> (SELECT NULL::bit)) t2;
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count
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-------
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4
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(1 row)
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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 hnsw (val bit_hamming_ops);
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ERROR: type not supported for hnsw index
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CREATE INDEX ON t USING hnsw ((val::bit(3)) bit_hamming_ops);
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CREATE INDEX ON t USING hnsw ((val::bit(64001)) bit_hamming_ops);
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ERROR: column cannot have more than 64000 dimensions for hnsw index
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DROP TABLE t;
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