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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
988 B
SQL
38 lines
988 B
SQL
-- float4 check
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CREATE TABLE float4tmp (a float4);
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\copy float4tmp from 'data/float4.data'
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SET enable_seqscan=on;
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SELECT count(*) FROM float4tmp WHERE a < -179.0;
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SELECT count(*) FROM float4tmp WHERE a <= -179.0;
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SELECT count(*) FROM float4tmp WHERE a = -179.0;
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SELECT count(*) FROM float4tmp WHERE a >= -179.0;
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SELECT count(*) FROM float4tmp WHERE a > -179.0;
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SELECT a, a <-> '-179.0' FROM float4tmp ORDER BY a <-> '-179.0' LIMIT 3;
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CREATE INDEX float4idx ON float4tmp USING gist ( a );
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SET enable_seqscan=off;
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SELECT count(*) FROM float4tmp WHERE a < -179.0::float4;
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SELECT count(*) FROM float4tmp WHERE a <= -179.0::float4;
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SELECT count(*) FROM float4tmp WHERE a = -179.0::float4;
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SELECT count(*) FROM float4tmp WHERE a >= -179.0::float4;
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SELECT count(*) FROM float4tmp WHERE a > -179.0::float4;
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EXPLAIN (COSTS OFF)
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SELECT a, a <-> '-179.0' FROM float4tmp ORDER BY a <-> '-179.0' LIMIT 3;
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SELECT a, a <-> '-179.0' FROM float4tmp ORDER BY a <-> '-179.0' LIMIT 3;
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