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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
1.7 KiB
Plaintext
92 lines
1.7 KiB
Plaintext
-- money check
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CREATE TABLE moneytmp (a money) WITH OIDS;
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\copy moneytmp from 'data/cash.data'
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SET enable_seqscan=on;
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SELECT count(*) FROM moneytmp WHERE a < '22649.64';
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count
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-------
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289
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(1 row)
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SELECT count(*) FROM moneytmp WHERE a <= '22649.64';
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count
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-------
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290
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(1 row)
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SELECT count(*) FROM moneytmp WHERE a = '22649.64';
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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 moneytmp WHERE a >= '22649.64';
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count
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-------
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254
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(1 row)
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SELECT count(*) FROM moneytmp WHERE a > '22649.64';
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count
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-------
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253
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(1 row)
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SELECT a, a <-> '21472.79' FROM moneytmp ORDER BY a <-> '21472.79' LIMIT 3;
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a | ?column?
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------------+----------
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$21,472.79 | $0.00
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$21,469.25 | $3.54
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$21,915.01 | $442.22
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(3 rows)
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CREATE INDEX moneyidx ON moneytmp USING gist ( a );
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SET enable_seqscan=off;
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SELECT count(*) FROM moneytmp WHERE a < '22649.64'::money;
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count
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-------
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289
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(1 row)
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SELECT count(*) FROM moneytmp WHERE a <= '22649.64'::money;
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count
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-------
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290
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(1 row)
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SELECT count(*) FROM moneytmp WHERE a = '22649.64'::money;
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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 moneytmp WHERE a >= '22649.64'::money;
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count
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-------
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254
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(1 row)
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SELECT count(*) FROM moneytmp WHERE a > '22649.64'::money;
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count
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-------
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253
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(1 row)
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EXPLAIN (COSTS OFF)
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SELECT a, a <-> '21472.79' FROM moneytmp ORDER BY a <-> '21472.79' LIMIT 3;
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QUERY PLAN
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-----------------------------------------------
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Limit
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-> Index Scan using moneyidx on moneytmp
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Order By: (a <-> '$21,472.79'::money)
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(3 rows)
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SELECT a, a <-> '21472.79' FROM moneytmp ORDER BY a <-> '21472.79' LIMIT 3;
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a | ?column?
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------------+----------
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$21,472.79 | $0.00
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$21,469.25 | $3.54
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$21,915.01 | $442.22
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(3 rows)
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