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update create_domain for 17.0 #3167

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Dec 5, 2024
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update create_domain for 17.0 #3167

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10 changes: 7 additions & 3 deletions doc/src/sgml/ref/create_domain.sgml
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,10 @@ CREATE DOMAIN <replaceable class="parameter">name</replaceable> [ AS ] <replacea
[ DEFAULT <replaceable>expression</replaceable> ]
[ <replaceable class="parameter">domain_constraint</replaceable> [ ... ] ]

<!--
<phrase>where <replaceable class="parameter">domain_constraint</replaceable> is:</phrase>
-->
<phrase>ここで<replaceable class="parameter">domain_constraint</replaceable>は、以下の通りです。</phrase>

[ CONSTRAINT <replaceable class="parameter">constraint_name</replaceable> ]
{ NOT NULL | NULL | CHECK (<replaceable class="parameter">expression</replaceable>) }
Expand Down Expand Up @@ -417,9 +420,10 @@ CREATE TABLE us_snail_addy (
<productname>PostgreSQL</productname> extension (see also <xref
linkend="sql-createtable-compatibility"/>).
-->
《機械翻訳》このコマンドの<literal>NOT NULL</literal>という構文は<productname>PostgreSQL</productname>の拡張です（同じことを書くための標準に準拠した方法は<literal>CHECK (VALUE IS NOT NULL）</literal>です。
しかし<xref linkend="sql-createdomain-notes"/>によると、実際にはそのような制約は避けた方が良いでしょう。
<literal>NULL</literal>の<quote>制約</quote>は<productname>PostgreSQL</productname>の拡張です（同じことを記述するための<xref linkend="sql-createtable-compatibility"/>も参照してください）。
このコマンドの<literal>NOT NULL</literal>という構文は<productname>PostgreSQL</productname>の拡張です。
（同じことを書くための標準に準拠した方法は<literal>CHECK (VALUE IS NOT NULL)</literal>です。
しかし<xref linkend="sql-createdomain-notes"/>に従って、実際にはそのような制約は避けるのが最善です。）
<literal>NULL</literal>の<quote>制約</quote>は<productname>PostgreSQL</productname>の拡張です（<xref linkend="sql-createtable-compatibility"/>も参照してください）。
</para>
</refsect1>

Expand Down