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8436489c81
This extends GiST's support for nearest-neighbor searches to many of the standard data types. Teodor Sigaev
92 lines
1.9 KiB
Plaintext
92 lines
1.9 KiB
Plaintext
-- int8 check
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CREATE TABLE int8tmp (a int8);
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\copy int8tmp from 'data/int8.data'
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SET enable_seqscan=on;
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SELECT count(*) FROM int8tmp WHERE a < 464571291354841;
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count
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-------
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276
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(1 row)
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SELECT count(*) FROM int8tmp WHERE a <= 464571291354841;
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count
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-------
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277
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(1 row)
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SELECT count(*) FROM int8tmp WHERE a = 464571291354841;
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count
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-------
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1
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(1 row)
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SELECT count(*) FROM int8tmp WHERE a >= 464571291354841;
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count
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-------
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271
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(1 row)
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SELECT count(*) FROM int8tmp WHERE a > 464571291354841;
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count
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-------
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270
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(1 row)
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SELECT a, a <-> '464571291354841' FROM int8tmp ORDER BY a <-> '464571291354841' LIMIT 3;
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a | ?column?
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-----------------+----------------
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464571291354841 | 0
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457257666629329 | 7313624725512
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478227196042750 | 13655904687909
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(3 rows)
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CREATE INDEX int8idx ON int8tmp USING gist ( a );
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SET enable_seqscan=off;
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SELECT count(*) FROM int8tmp WHERE a < 464571291354841::int8;
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count
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-------
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276
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(1 row)
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SELECT count(*) FROM int8tmp WHERE a <= 464571291354841::int8;
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count
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-------
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277
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(1 row)
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SELECT count(*) FROM int8tmp WHERE a = 464571291354841::int8;
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count
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-------
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1
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(1 row)
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SELECT count(*) FROM int8tmp WHERE a >= 464571291354841::int8;
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count
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-------
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271
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(1 row)
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SELECT count(*) FROM int8tmp WHERE a > 464571291354841::int8;
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count
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-------
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270
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(1 row)
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EXPLAIN (COSTS OFF)
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SELECT a, a <-> '464571291354841' FROM int8tmp ORDER BY a <-> '464571291354841' LIMIT 3;
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QUERY PLAN
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---------------------------------------------------
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Limit
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-> Index Scan using int8idx on int8tmp
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Order By: (a <-> 464571291354841::bigint)
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(3 rows)
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SELECT a, a <-> '464571291354841' FROM int8tmp ORDER BY a <-> '464571291354841' LIMIT 3;
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a | ?column?
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-----------------+----------------
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464571291354841 | 0
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457257666629329 | 7313624725512
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478227196042750 | 13655904687909
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(3 rows)
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