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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
1.2 KiB
SQL
42 lines
1.2 KiB
SQL
-- 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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SELECT count(*) FROM int8tmp WHERE a <= 464571291354841;
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SELECT count(*) FROM int8tmp WHERE a = 464571291354841;
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SELECT count(*) FROM int8tmp WHERE a >= 464571291354841;
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SELECT count(*) FROM int8tmp WHERE a > 464571291354841;
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SELECT a, a <-> '464571291354841' FROM int8tmp ORDER BY a <-> '464571291354841' LIMIT 3;
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SET client_min_messages = DEBUG1;
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CREATE INDEX int8idx ON int8tmp USING gist ( a );
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CREATE INDEX int8idx_b ON int8tmp USING gist ( a ) WITH (buffering=on);
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DROP INDEX int8idx_b;
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RESET client_min_messages;
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SET enable_seqscan=off;
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SELECT count(*) FROM int8tmp WHERE a < 464571291354841::int8;
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SELECT count(*) FROM int8tmp WHERE a <= 464571291354841::int8;
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SELECT count(*) FROM int8tmp WHERE a = 464571291354841::int8;
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SELECT count(*) FROM int8tmp WHERE a >= 464571291354841::int8;
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SELECT count(*) FROM int8tmp WHERE a > 464571291354841::int8;
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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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SELECT a, a <-> '464571291354841' FROM int8tmp ORDER BY a <-> '464571291354841' LIMIT 3;
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