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Add index-only scan support to btree_gist.

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

View File

@ -74,10 +74,10 @@ SELECT count(*) FROM float4tmp WHERE a > -179.0::float4;
EXPLAIN (COSTS OFF)
SELECT a, a <-> '-179.0' FROM float4tmp ORDER BY a <-> '-179.0' LIMIT 3;
QUERY PLAN
-----------------------------------------------
QUERY PLAN
----------------------------------------------------
Limit
-> Index Scan using float4idx on float4tmp
-> Index Only Scan using float4idx on float4tmp
Order By: (a <-> (-179)::real)
(3 rows)