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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
109 lines
2.4 KiB
Plaintext
109 lines
2.4 KiB
Plaintext
-- inet check
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CREATE TABLE inettmp (a inet);
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\copy inettmp from 'data/inet.data'
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SET enable_seqscan=on;
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SELECT count(*) FROM inettmp WHERE a < '89.225.196.191';
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count
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-------
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213
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(1 row)
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SELECT count(*) FROM inettmp WHERE a <= '89.225.196.191';
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count
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-------
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214
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(1 row)
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SELECT count(*) FROM inettmp WHERE a = '89.225.196.191';
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count
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-------
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1
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(1 row)
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SELECT count(*) FROM inettmp WHERE a >= '89.225.196.191';
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count
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-------
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387
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(1 row)
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SELECT count(*) FROM inettmp WHERE a > '89.225.196.191';
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count
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-------
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386
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(1 row)
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SET client_min_messages = DEBUG1;
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CREATE INDEX inetidx ON inettmp USING gist ( a );
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DEBUG: building index "inetidx" on table "inettmp" serially
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DEBUG: using sorted GiST build
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CREATE INDEX inetidx_b ON inettmp USING gist ( a ) WITH (buffering=on);
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DEBUG: building index "inetidx_b" on table "inettmp" serially
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DROP INDEX inetidx_b;
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RESET client_min_messages;
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SET enable_seqscan=off;
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SELECT count(*) FROM inettmp WHERE a < '89.225.196.191'::inet;
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count
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-------
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213
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(1 row)
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SELECT count(*) FROM inettmp WHERE a <= '89.225.196.191'::inet;
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count
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-------
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214
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(1 row)
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SELECT count(*) FROM inettmp WHERE a = '89.225.196.191'::inet;
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count
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-------
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1
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(1 row)
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SELECT count(*) FROM inettmp WHERE a >= '89.225.196.191'::inet;
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count
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-------
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387
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(1 row)
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SELECT count(*) FROM inettmp WHERE a > '89.225.196.191'::inet;
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count
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-------
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386
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(1 row)
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VACUUM ANALYZE inettmp;
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-- gist_inet_ops lacks a fetch function, so this should not be index-only scan
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM inettmp WHERE a = '89.225.196.191'::inet;
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QUERY PLAN
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--------------------------------------------------
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Aggregate
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-> Index Scan using inetidx on inettmp
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Index Cond: (a = '89.225.196.191'::inet)
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(3 rows)
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SELECT count(*) FROM inettmp WHERE a = '89.225.196.191'::inet;
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count
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-------
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1
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(1 row)
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DROP INDEX inetidx;
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CREATE INDEX ON inettmp USING gist (a gist_inet_ops, a inet_ops);
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-- likewise here (checks for core planner bug)
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM inettmp WHERE a = '89.225.196.191'::inet;
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QUERY PLAN
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----------------------------------------------------
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Aggregate
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-> Index Scan using inettmp_a_a1_idx on inettmp
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Index Cond: (a = '89.225.196.191'::inet)
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(3 rows)
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SELECT count(*) FROM inettmp WHERE a = '89.225.196.191'::inet;
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count
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-------
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1
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(1 row)
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