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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
1.0 KiB
SQL
42 lines
1.0 KiB
SQL
-- int4 check
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CREATE TABLE int4tmp (a int4);
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\copy int4tmp from 'data/int2.data'
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SET enable_seqscan=on;
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SELECT count(*) FROM int4tmp WHERE a < 237;
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SELECT count(*) FROM int4tmp WHERE a <= 237;
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SELECT count(*) FROM int4tmp WHERE a = 237;
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SELECT count(*) FROM int4tmp WHERE a >= 237;
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SELECT count(*) FROM int4tmp WHERE a > 237;
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SELECT a, a <-> '237' FROM int4tmp ORDER BY a <-> '237' LIMIT 3;
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SET client_min_messages = DEBUG1;
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CREATE INDEX int4idx ON int4tmp USING gist ( a );
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CREATE INDEX int4idx_b ON int4tmp USING gist ( a ) WITH (buffering=on);
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DROP INDEX int4idx_b;
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RESET client_min_messages;
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SET enable_seqscan=off;
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SELECT count(*) FROM int4tmp WHERE a < 237::int4;
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SELECT count(*) FROM int4tmp WHERE a <= 237::int4;
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SELECT count(*) FROM int4tmp WHERE a = 237::int4;
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SELECT count(*) FROM int4tmp WHERE a >= 237::int4;
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SELECT count(*) FROM int4tmp WHERE a > 237::int4;
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EXPLAIN (COSTS OFF)
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SELECT a, a <-> '237' FROM int4tmp ORDER BY a <-> '237' LIMIT 3;
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SELECT a, a <-> '237' FROM int4tmp ORDER BY a <-> '237' LIMIT 3;
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