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Improve description of pg_attrdef in documentation

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The reference to pg_attribute is switched to a link, which is more
useful for the html documentation.  The conditions under which a default
value is defined for a given column are made more general.

Author: Daniel Gustafsson
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/0E8748E3-8B7D-445E-9ABA-09DA5C7345CC@yesql.se
This commit is contained in:
Michael Paquier 2018-10-29 16:38:54 +09:00
parent 051a1494bd
commit 0993b8ada5
1 changed files with 5 additions and 5 deletions
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10
doc/src/sgml/catalogs.sgml
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@ -901,11 +901,11 @@
</indexterm>
<para>
The catalog <structname>pg_attrdef</structname> stores column default values. The main information
about columns is stored in <structname>pg_attribute</structname>
(see below). Only columns that explicitly specify a default value
(when the table is created or the column is added) will have an
entry here.
The catalog <structname>pg_attrdef</structname> stores column default
values. The main information about columns is stored in
<link linkend="catalog-pg-attribute"><structname>pg_attribute</structname></link>.
Only columns for which a default value has been explicitly set will have
an entry here.
</para>
<table>