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doc: fix ALTER DOMAIN domain_constraint to spell out options

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It used to refer to CREATE DOMAIN, but CREATE DOMAIN allows NULL, while
ALTER DOMAIN does not.

Reported-by: elionescu@yahoo.com

Discussion: https://postgr.es/m/172225092461.915373.6103973717483380183@wrigleys.postgresql.org

Backpatch-through: 12
This commit is contained in:
Bruce Momjian 2024-11-01 13:54:28 -04:00
parent 4bedca41f5
commit ce0ddbbf3e
1 changed files with 6 additions and 2 deletions
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8
doc/src/sgml/ref/alter_domain.sgml
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@ -41,6 +41,11 @@ ALTER DOMAIN <replaceable class="parameter">name</replaceable>
RENAME TO <replaceable class="parameter">new_name</replaceable>
ALTER DOMAIN <replaceable class="parameter">name</replaceable>
SET SCHEMA <replaceable class="parameter">new_schema</replaceable>
<phrase>where <replaceable class="parameter">domain_constraint</replaceable> is:</phrase>
[ CONSTRAINT <replaceable class="parameter">constraint_name</replaceable> ]
{ NOT NULL | CHECK (<replaceable class="parameter">expression</replaceable>) }
</synopsis>
</refsynopsisdiv>
@ -79,8 +84,7 @@ ALTER DOMAIN <replaceable class="parameter">name</replaceable>
<term><literal>ADD <replaceable class="parameter">domain_constraint</replaceable> [ NOT VALID ]</literal></term>
<listitem>
<para>
This form adds a new constraint to a domain using the same syntax as
<link linkend="sql-createdomain"><command>CREATE DOMAIN</command></link>.
This form adds a new constraint to a domain.
When a new constraint is added to a domain, all columns using that
domain will be checked against the newly added constraint. These
checks can be suppressed by adding the new constraint using the