a4da804193
The VALUES reference page said that an AS clause was required when
VALUES is used in a FROM clause. This was imprecise because AS is
optional when specifying an alias.
In v14 and v15, a table alias is still required in this case, so state
that explicitly instead. In v16 and later, commit bcedd8f5fc made table
aliases for subqueries in FROM clauses optional, so state that the
table alias is optional there. In all branches, continue to recommend
explicit column aliases as good practice.
Backpatch to all supported versions.
Author: Ian Barwick <barwick@gmail.com>
Reviewed-by: Laurenz Albe <laurenz.albe@cybertec.at>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/CAB8KJ=jrvZdNLLhYSiCgbjLTz2LKEjYw+-HVQkaF+kgk61KtHA@mail.gmail.com
Backpatch-through: 14
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/19/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/19/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.