From 04db9d25d1961b1f056dec32f6711d0af0629bef Mon Sep 17 00:00:00 2001 From: Bruce Momjian Date: Thu, 8 Dec 2005 21:35:36 +0000 Subject: [PATCH] there's a paragraph in the ALTER TABLE reference page that reads: DROP CONSTRAINT This form drops constraints on a table. Currently, constraints on tables are not required to have unique names, so there may be more than one constraint matching the specified name. All matching constraints will be dropped. To my knowledge, it is no longer possible to create constraints with the same name for the same relation. When you create a constraint and specify the same name explictly, an error is raised. Implicit constraint creation won't choose an existing name either and up to now you could not rename a constraint. Renaming works with the patch I sent in a few hours ago but this patch as well won't allow constraints with identical names on the same relation. The attached patch thus removes the note in the docs. Joachim Wieland --- doc/src/sgml/ref/alter_table.sgml | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/doc/src/sgml/ref/alter_table.sgml b/doc/src/sgml/ref/alter_table.sgml index a588f847ce..58a4876f33 100644 --- a/doc/src/sgml/ref/alter_table.sgml +++ b/doc/src/sgml/ref/alter_table.sgml @@ -1,5 +1,5 @@ @@ -183,10 +183,7 @@ where action is one of: DROP CONSTRAINT - This form drops constraints on a table. - Currently, constraints on tables are not required to have unique - names, so there may be more than one constraint matching the specified - name. All matching constraints will be dropped. + This form drops the specified constraint on a table.