postgresql/doc
Tom Lane fe375d33a1 Doc: rework introductory documentation about covering indexes.
Documenting INCLUDE in the section about unique indexes is confusing,
as complained of by Emilio Platzer.  Furthermore, it entirely failed
to explain why you might want to use the feature.  The section about
index-only scans is really the right place; it already talked about
making such things the hard way.  Rewrite that text to describe INCLUDE
as the normal way to make a covering index.

Also, move that section up a couple of places, as it now seems more
important than some of the stuff we had before it.  It still has to
be after expression and partial indexes, since otherwise some of it
would involve forward references.

Discussion: https://postgr.es/m/154031939560.30897.14677735588262722042@wrigleys.postgresql.org
2018-11-22 13:25:10 -05:00
..
src Doc: rework introductory documentation about covering indexes. 2018-11-22 13:25:10 -05:00
bug.template Stamp HEAD as 12devel 2018-06-30 12:47:59 -04:00
KNOWN_BUGS Remove extra newlines at end and beginning of files, add missing newlines 2010-08-19 05:57:36 +00:00
Makefile Remove maintainer-check target, fold into normal build 2013-10-10 20:11:56 -04:00
MISSING_FEATURES Remove extra newlines at end and beginning of files, add missing newlines 2010-08-19 05:57:36 +00:00
TODO Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00