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Add sortsupport for gist_btree opclasses, for faster index builds.

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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
This commit is contained in:
Heikki Linnakangas
2021-04-07 13:22:05 +03:00
parent dd13ad9d39
commit 9f984ba6d2
77 changed files with 1530 additions and 3 deletions
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7
contrib/btree_gist/expected/uuid.out
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@ -32,7 +32,14 @@ SELECT count(*) FROM uuidtmp WHERE a > '55e65ca2-4136-4a4b-ba78-cd3fe4678203';
375
(1 row)
SET client_min_messages = DEBUG1;
CREATE INDEX uuididx ON uuidtmp USING gist ( a );
DEBUG: building index "uuididx" on table "uuidtmp" serially
DEBUG: using sorted GiST build
CREATE INDEX uuididx_b ON uuidtmp USING gist ( a ) WITH (buffering=on);
DEBUG: building index "uuididx_b" on table "uuidtmp" serially
DROP INDEX uuididx_b;
RESET client_min_messages;
SET enable_seqscan=off;
SELECT count(*) FROM uuidtmp WHERE a < '55e65ca2-4136-4a4b-ba78-cd3fe4678203'::uuid;
count