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Add sortsupport for gist_btree opclasses, for faster index builds.
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
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@ -46,7 +46,14 @@ SELECT count(*) FROM enumtmp WHERE a > 'g'::rainbow;
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230
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(1 row)
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SET client_min_messages = DEBUG1;
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CREATE INDEX enumidx ON enumtmp USING gist ( a );
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DEBUG: building index "enumidx" on table "enumtmp" serially
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DEBUG: using sorted GiST build
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CREATE INDEX enumidx_b ON enumtmp USING gist ( a ) WITH (buffering=on);
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DEBUG: building index "enumidx_b" on table "enumtmp" serially
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DROP INDEX enumidx_b;
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RESET client_min_messages;
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SET enable_seqscan=off;
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SELECT count(*) FROM enumtmp WHERE a < 'g'::rainbow;
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count
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