From 8b9d5927be0471c0eb77843d2fed360e614b9325 Mon Sep 17 00:00:00 2001 From: Ian Barwick Date: Fri, 21 Aug 2026 19:03:55 +0900 Subject: [PATCH v3] doc: clarify AS requirement when VALUES used in a FROM clause From PostgreSQL 16 (commit bcedd8f), subquery aliases in the FROM clause are optional, so update the VALUES reference documentation to reflect this. --- doc/src/sgml/ref/values.sgml | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/doc/src/sgml/ref/values.sgml b/doc/src/sgml/ref/values.sgml index 4bf7bfdffee..8536d065aad 100644 --- a/doc/src/sgml/ref/values.sgml +++ b/doc/src/sgml/ref/values.sgml @@ -198,10 +198,9 @@ UPDATE employees SET salary = salary * v.increase WHERE employees.depno = v.depno AND employees.sales >= v.target; - Note that an AS clause is required when VALUES - is used in a FROM clause, just as is true for - SELECT. It is not required that the AS clause - specify names for all the columns, but it's good practice to do so. + Note that if VALUES is used in a FROM + clause, a table alias is optional. Assigning alias names to the columns + of the VALUES list is optional, but is good practice. (The default column names for VALUES are column1, column2, etc. in PostgreSQL, but these names might be different in other database systems.) -- 2.43.0