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8436489c81
This extends GiST's support for nearest-neighbor searches to many of the standard data types. Teodor Sigaev
38 lines
1.3 KiB
SQL
38 lines
1.3 KiB
SQL
-- timestamp check
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CREATE TABLE timestamptmp (a timestamp);
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\copy timestamptmp from 'data/timestamp.data'
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SET enable_seqscan=on;
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SELECT count(*) FROM timestamptmp WHERE a < '2004-10-26 08:55:08';
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SELECT count(*) FROM timestamptmp WHERE a <= '2004-10-26 08:55:08';
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SELECT count(*) FROM timestamptmp WHERE a = '2004-10-26 08:55:08';
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SELECT count(*) FROM timestamptmp WHERE a >= '2004-10-26 08:55:08';
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SELECT count(*) FROM timestamptmp WHERE a > '2004-10-26 08:55:08';
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SELECT a, a <-> '2004-10-26 08:55:08' FROM timestamptmp ORDER BY a <-> '2004-10-26 08:55:08' LIMIT 3;
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CREATE INDEX timestampidx ON timestamptmp USING gist ( a );
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SET enable_seqscan=off;
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SELECT count(*) FROM timestamptmp WHERE a < '2004-10-26 08:55:08'::timestamp;
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SELECT count(*) FROM timestamptmp WHERE a <= '2004-10-26 08:55:08'::timestamp;
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SELECT count(*) FROM timestamptmp WHERE a = '2004-10-26 08:55:08'::timestamp;
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SELECT count(*) FROM timestamptmp WHERE a >= '2004-10-26 08:55:08'::timestamp;
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SELECT count(*) FROM timestamptmp WHERE a > '2004-10-26 08:55:08'::timestamp;
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EXPLAIN (COSTS OFF)
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SELECT a, a <-> '2004-10-26 08:55:08' FROM timestamptmp ORDER BY a <-> '2004-10-26 08:55:08' LIMIT 3;
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SELECT a, a <-> '2004-10-26 08:55:08' FROM timestamptmp ORDER BY a <-> '2004-10-26 08:55:08' LIMIT 3;
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