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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
74 lines
1.6 KiB
Plaintext
74 lines
1.6 KiB
Plaintext
-- uuid check
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CREATE TABLE uuidtmp (a uuid);
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\copy uuidtmp from 'data/uuid.data'
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SET enable_seqscan=on;
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SELECT count(*) FROM uuidtmp WHERE a < '55e65ca2-4136-4a4b-ba78-cd3fe4678203';
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count
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-------
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227
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(1 row)
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SELECT count(*) FROM uuidtmp WHERE a <= '55e65ca2-4136-4a4b-ba78-cd3fe4678203';
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count
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-------
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228
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(1 row)
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SELECT count(*) FROM uuidtmp WHERE a = '55e65ca2-4136-4a4b-ba78-cd3fe4678203';
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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 uuidtmp WHERE a >= '55e65ca2-4136-4a4b-ba78-cd3fe4678203';
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count
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-------
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376
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(1 row)
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SELECT count(*) FROM uuidtmp WHERE a > '55e65ca2-4136-4a4b-ba78-cd3fe4678203';
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count
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-------
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375
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(1 row)
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SET client_min_messages = DEBUG1;
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CREATE INDEX uuididx ON uuidtmp USING gist ( a );
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DEBUG: building index "uuididx" on table "uuidtmp" serially
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DEBUG: using sorted GiST build
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CREATE INDEX uuididx_b ON uuidtmp USING gist ( a ) WITH (buffering=on);
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DEBUG: building index "uuididx_b" on table "uuidtmp" serially
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DROP INDEX uuididx_b;
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RESET client_min_messages;
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SET enable_seqscan=off;
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SELECT count(*) FROM uuidtmp WHERE a < '55e65ca2-4136-4a4b-ba78-cd3fe4678203'::uuid;
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count
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-------
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227
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(1 row)
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SELECT count(*) FROM uuidtmp WHERE a <= '55e65ca2-4136-4a4b-ba78-cd3fe4678203'::uuid;
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count
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-------
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228
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(1 row)
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SELECT count(*) FROM uuidtmp WHERE a = '55e65ca2-4136-4a4b-ba78-cd3fe4678203'::uuid;
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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 uuidtmp WHERE a >= '55e65ca2-4136-4a4b-ba78-cd3fe4678203'::uuid;
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count
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-------
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376
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(1 row)
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SELECT count(*) FROM uuidtmp WHERE a > '55e65ca2-4136-4a4b-ba78-cd3fe4678203'::uuid;
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count
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-------
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375
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(1 row)
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