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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
43 lines
1.1 KiB
SQL
43 lines
1.1 KiB
SQL
-- enum check
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create type rainbow as enum ('r','o','y','g','b','i','v');
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CREATE TABLE enumtmp (a rainbow);
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\copy enumtmp from 'data/enum.data'
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SET enable_seqscan=on;
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select a, count(*) from enumtmp group by a order by 1;
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SELECT count(*) FROM enumtmp WHERE a < 'g'::rainbow;
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SELECT count(*) FROM enumtmp WHERE a <= 'g'::rainbow;
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SELECT count(*) FROM enumtmp WHERE a = 'g'::rainbow;
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SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
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SELECT count(*) FROM enumtmp WHERE a > 'g'::rainbow;
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SET client_min_messages = DEBUG1;
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CREATE INDEX enumidx ON enumtmp USING gist ( a );
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CREATE INDEX enumidx_b ON enumtmp USING gist ( a ) WITH (buffering=on);
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DROP INDEX enumidx_b;
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RESET client_min_messages;
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SET enable_seqscan=off;
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SELECT count(*) FROM enumtmp WHERE a < 'g'::rainbow;
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SELECT count(*) FROM enumtmp WHERE a <= 'g'::rainbow;
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SELECT count(*) FROM enumtmp WHERE a = 'g'::rainbow;
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SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
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SELECT count(*) FROM enumtmp WHERE a > 'g'::rainbow;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
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