Doc: improve documentation about composite-value usage.

Tom Lane <tgl@sss.pgh.pa.us>

Commit: 112676f590331356d1239068260b4642bd6073f2
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2016-11-22T22:56:16Z
Releases: 9.6.2
Doc: improve documentation about composite-value usage.

Create a section specifically for the syntactic rules around whole-row
variable usage, such as expansion of "foo.*".  This was previously
documented only haphazardly, with some critical info buried in
unexpected places like xfunc-sql-composite-functions.  Per repeated
questions in different mailing lists.

Discussion: <16288.1479610770@sss.pgh.pa.us>

Files

PathChange+/−
doc/src/sgml/queries.sgml modified +2 −1
doc/src/sgml/rowtypes.sgml modified +207 −7
doc/src/sgml/syntax.sgml modified +9 −7
doc/src/sgml/xfunc.sgml modified +13 −57

Documentation touched