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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
48 lines
1.6 KiB
SQL
48 lines
1.6 KiB
SQL
-- interval check
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CREATE TABLE intervaltmp (a interval);
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\copy intervaltmp from 'data/interval.data'
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SET enable_seqscan=on;
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SELECT count(*) FROM intervaltmp WHERE a < '199 days 21:21:23';
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SELECT count(*) FROM intervaltmp WHERE a <= '199 days 21:21:23';
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SELECT count(*) FROM intervaltmp WHERE a = '199 days 21:21:23';
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SELECT count(*) FROM intervaltmp WHERE a >= '199 days 21:21:23';
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SELECT count(*) FROM intervaltmp WHERE a > '199 days 21:21:23';
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SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
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SET client_min_messages = DEBUG1;
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CREATE INDEX intervalidx ON intervaltmp USING gist ( a );
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CREATE INDEX intervalidx_b ON intervaltmp USING gist ( a ) WITH (buffering=on);
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DROP INDEX intervalidx_b;
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RESET client_min_messages;
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SET enable_seqscan=off;
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SELECT count(*) FROM intervaltmp WHERE a < '199 days 21:21:23'::interval;
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SELECT count(*) FROM intervaltmp WHERE a <= '199 days 21:21:23'::interval;
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SELECT count(*) FROM intervaltmp WHERE a = '199 days 21:21:23'::interval;
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SELECT count(*) FROM intervaltmp WHERE a >= '199 days 21:21:23'::interval;
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SELECT count(*) FROM intervaltmp WHERE a > '199 days 21:21:23'::interval;
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EXPLAIN (COSTS OFF)
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SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
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SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
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SET enable_indexonlyscan=off;
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EXPLAIN (COSTS OFF)
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SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
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SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
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