9f984ba6d2
Commit 16fa9b2b30 introduced a faster way to build GiST indexes, by sorting all the data. This commit adds the sortsupport functions needed to make use of that feature for btree_gist. Author: Andrey Borodin Discussion: https://www.postgresql.org/message-id/2F3F7265-0D22-44DB-AD71-8554C743D943@yandex-team.ru
42 lines
1.1 KiB
SQL
42 lines
1.1 KiB
SQL
-- date check
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CREATE TABLE datetmp (a date);
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\copy datetmp from 'data/date.data'
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SET enable_seqscan=on;
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SELECT count(*) FROM datetmp WHERE a < '2001-02-13';
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SELECT count(*) FROM datetmp WHERE a <= '2001-02-13';
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SELECT count(*) FROM datetmp WHERE a = '2001-02-13';
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SELECT count(*) FROM datetmp WHERE a >= '2001-02-13';
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SELECT count(*) FROM datetmp WHERE a > '2001-02-13';
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SELECT a, a <-> '2001-02-13' FROM datetmp ORDER BY a <-> '2001-02-13' LIMIT 3;
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SET client_min_messages = DEBUG1;
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CREATE INDEX dateidx ON datetmp USING gist ( a );
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CREATE INDEX dateidx_b ON datetmp USING gist ( a ) WITH (buffering=on);
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DROP INDEX dateidx_b;
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RESET client_min_messages;
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SET enable_seqscan=off;
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SELECT count(*) FROM datetmp WHERE a < '2001-02-13'::date;
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SELECT count(*) FROM datetmp WHERE a <= '2001-02-13'::date;
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SELECT count(*) FROM datetmp WHERE a = '2001-02-13'::date;
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SELECT count(*) FROM datetmp WHERE a >= '2001-02-13'::date;
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SELECT count(*) FROM datetmp WHERE a > '2001-02-13'::date;
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EXPLAIN (COSTS OFF)
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SELECT a, a <-> '2001-02-13' FROM datetmp ORDER BY a <-> '2001-02-13' LIMIT 3;
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SELECT a, a <-> '2001-02-13' FROM datetmp ORDER BY a <-> '2001-02-13' LIMIT 3;
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