CREATE UNIQUE INDEX name ON table (column [, ...]) [ NULLS [ NOT ] DISTINCT ];

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From: PG Doc comments form <noreply@postgresql.org>
To: pgsql-docs@lists.postgresql.org
Cc: tim.dadd@gmail.com
Subject: CREATE UNIQUE INDEX name ON table (column [, ...]) [ NULLS [ NOT ] DISTINCT ];
Date: Sun, 10 Nov 2024 11:36:32 +0000
Message-ID: <173123859233.708.15625173411353921889@wrigleys.postgresql.org> (raw)

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/17/indexes-unique.html
Description:

This says it works from 12 onwards but actually from 15 onwards
Prior to 15 unique partial indexes needed creating, e.g. (parent_ID, NAME)
where parent_ID is not null and (NAME) where parent_id is null

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