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| author | Simon Riggs <simon@2ndQuadrant.com> | 2012-06-01 11:35:27 +0100 |
|---|---|---|
| committer | Simon Riggs <simon@2ndQuadrant.com> | 2012-06-01 11:35:27 +0100 |
| commit | 56b62cbd01f2857a1f7e72614922b62148350a75 (patch) | |
| tree | 7dc53e92302f03b7158753fbd64a3a272d6652be | |
| parent | a6e1d7b5fb2ac117acd83aa690767410521cb46b (diff) | |
| download | postgresql-56b62cbd01f2857a1f7e72614922b62148350a75.tar.gz postgresql-56b62cbd01f2857a1f7e72614922b62148350a75.zip | |
Clarify description of covering indexes in release notes
| -rw-r--r-- | doc/src/sgml/release-9.2.sgml | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/src/sgml/release-9.2.sgml b/doc/src/sgml/release-9.2.sgml index a842d448e9e..ce368e90988 100644 --- a/doc/src/sgml/release-9.2.sgml +++ b/doc/src/sgml/release-9.2.sgml @@ -425,7 +425,8 @@ </para> <para> - This is often called "index-only scans" or "covering indexes". + This is often called "index-only scans", a feature which now enables + the use of indexes with additional columns, or "covering indexes". This is possible for heap pages with exclusively all-visible tuples, as reported by the visibility map. The visibility map was made crash-safe as a necessary part of implementing this feature. |