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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/time.out
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@ -40,7 +40,14 @@ SELECT a, a <-> '10:57:11' FROM timetmp ORDER BY a <-> '10:57:11' LIMIT 3;
10:55:32 | @ 1 min 39 secs
(3 rows)
SET client_min_messages = DEBUG1;
CREATE INDEX timeidx ON timetmp USING gist ( a );
DEBUG: building index "timeidx" on table "timetmp" serially
DEBUG: using sorted GiST build
CREATE INDEX timeidx_b ON timetmp USING gist ( a ) WITH (buffering=on);
DEBUG: building index "timeidx_b" on table "timetmp" serially
DROP INDEX timeidx_b;
RESET client_min_messages;
SET enable_seqscan=off;
SELECT count(*) FROM timetmp WHERE a < '10:57:11'::time;
count