]> granicus.if.org Git - postgresql/commit
Doc: clarify when table rewrites happen with column addition and DEFAULT
authorMichael Paquier <michael@paquier.xyz>
Fri, 19 Jul 2019 02:43:05 +0000 (11:43 +0900)
committerMichael Paquier <michael@paquier.xyz>
Fri, 19 Jul 2019 02:43:05 +0000 (11:43 +0900)
commitb990cc38dc64f3333c1c61aba247bfbaea1475f8
tree89eebc91d8667166368602e4661336368fc0610d
parent5245552ddbc43b7705389cae9c5095e687a3c950
Doc: clarify when table rewrites happen with column addition and DEFAULT

16828d5 has improved ALTER TABLE so as a column addition does not
require a rewrite for a non-NULL default with constant expressions, but
one spot in the documentation did not get updated consistently.
The documentation also now clarifies the fact that this does not apply
if the expression is volatile, where a table rewrite is still required.

Reported-by: Daniel Westermann
Author: Ian Barwick
Reviewed-by: Michael Paquier, Daniel Westermann
Discussion: https://postgr.es/m/DB6PR0902MB2184C7D5645CF15D75EB7957D2CF0@DB6PR0902MB2184.eurprd09.prod.outlook.com
Backpatch-through: 11
doc/src/sgml/ddl.sgml