diff options
| author | Peter Geoghegan <pg@bowt.ie> | 2018-06-16 15:28:50 -0700 |
|---|---|---|
| committer | Peter Geoghegan <pg@bowt.ie> | 2018-06-16 15:28:50 -0700 |
| commit | 514d4a1338d5409431d644eaf453193ac362ef16 (patch) | |
| tree | 310d4adf32cef7e71f76d1d48cded2c6d61a2f53 | |
| parent | e716585235b175de767d3b210f0a963457dfa77f (diff) | |
| download | postgresql-514d4a1338d5409431d644eaf453193ac362ef16.tar.gz postgresql-514d4a1338d5409431d644eaf453193ac362ef16.zip | |
Remove INCLUDE attributes section from docs.
Discussing covering indexes in a chapter that is mostly about the
behavior of B-Tree operator classes is unnecessary. The CREATE INDEX
documentation's handling of covering indexes seems sufficient.
Discussion: https://postgr.es/m/CAH2-WzmpU=L_6VjhhOAMfoyHLr-pZd1kDc+jpa3c3a8EOmtcXA@mail.gmail.com
| -rw-r--r-- | doc/src/sgml/btree.sgml | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/doc/src/sgml/btree.sgml b/doc/src/sgml/btree.sgml index 336d026ea16..8bd0badb280 100644 --- a/doc/src/sgml/btree.sgml +++ b/doc/src/sgml/btree.sgml @@ -433,23 +433,6 @@ returns bool </sect1> -<sect1 id="btree-included-attributes"> - <title>Included attributes in B-tree indexes</title> - - <para> - As of <productname>PostgreSQL</productname> 11.0 there is an optional - INCLUDE clause, which allows to add non-key (included) attributes to index. - Those included attributes allow more queries to benefit from index-only scans. - We never use included attributes in ScanKeys for search. That allows us to - include into B-tree any datatypes, even those which don't have suitable - operator classes. Included columns only stored in regular tuples on leaf - pages. All pivot tuples on non-leaf pages and highkey tuples are truncated - to contain only key attributes. That helps to slightly reduce the size of - index. - </para> - -</sect1> - <sect1 id="btree-implementation"> <title>Implementation</title> |