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Add index-only scan support to btree_gist.

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inet, cidr, and timetz indexes still cannot support index-only scans,
because they don't store the original unmodified value in the index, but a
derived approximate value.
This commit is contained in:
Heikki Linnakangas
2015-03-27 23:35:16 +02:00
parent 735cd6128a
commit e09b48316c
46 changed files with 614 additions and 51 deletions
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16
contrib/btree_gist/expected/text.out
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@ -71,3 +71,19 @@ SELECT count(*) FROM texttmp WHERE a = '2eb2c961c1cbf6 cf8d7b68cb9a2f36 7bbedb
1
(1 row)
-- Test index-only scans
SET enable_bitmapscan=off;
EXPLAIN (COSTS OFF)
SELECT * FROM texttmp WHERE a BETWEEN '31a' AND '31c';
QUERY PLAN
-----------------------------------------------------------
Index Only Scan using textidx on texttmp
Index Cond: ((a >= '31a'::text) AND (a <= '31c'::text))
(2 rows)
SELECT * FROM texttmp WHERE a BETWEEN '31a' AND '31c';
a
------
31b0
(1 row)