Doc: clarify the default collation behavior of domains.

Tom Lane <tgl@sss.pgh.pa.us>

Commit: d6d9ea0a468bd5a8bf0feb98e41f1ecb4b8a173d
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2022-06-14T21:47:09Z
Releases: 13.8
Doc: clarify the default collation behavior of domains.

The previous wording was "the underlying data type's default collation
is used", which is wrong or at least misleading.  The domain inherits
the base type's collation behavior, which if "default" actually can
mean that we use some non-default collation obtained from elsewhere.

Per complaint from Jian He.

Discussion: https://postgr.es/m/CACJufxHMR8_4WooDPjjvEdaxB2hQ5a49qthci8fpKP0MKemVRQ@mail.gmail.com

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doc/src/sgml/ref/create_domain.sgml modified +2 −1

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