doc: Clarify that pg_attrdef also stores generation expressions

Peter Eisentraut <peter@eisentraut.org>

Commit: da486d360103fbb3cd0d3f3b70134d47e9bb652a
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2024-07-01T06:39:07Z
Releases: 18.0
doc: Clarify that pg_attrdef also stores generation expressions

This was documented with pg_attribute but not with pg_attrdef.

Reported-by: jian he <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/CACJufxE+E-iYmBnZVZHiYA+WpyZZVv7BfiBLpo=T70EZHDU9rw@mail.gmail.com

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doc/src/sgml/catalogs.sgml modified +6 −5

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