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Alexander Korotkov f2e403803f Support for INCLUDE attributes in GiST indexes ... Similarly to B-tree, GiST index access method gets support of INCLUDE attributes. These attributes aren't used for tree navigation and aren't present in non-leaf pages. But they are present in leaf pages and can be fetched during index-only scan. The point of having INCLUDE attributes in GiST indexes is slightly different from the point of having them in B-tree. The main point of INCLUDE attributes in B-tree is to define UNIQUE constraint over part of attributes enabled for index-only scan. In GiST the main point of INCLUDE attributes is to use index-only scan for attributes, whose data types don't have GiST opclasses. Discussion: https://postgr.es/m/73A1A452-AD5F-40D4-BD61-978622FF75C1%40yandex-team.ru Author: Andrey Borodin, with small changes by me Reviewed-by: Andreas Karlsson		7 years ago
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src	Support for INCLUDE attributes in GiST indexes	7 years ago
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