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Add some minimal documentation that the SQL standard requires parentheses

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after ONLY.
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Peter Eisentraut 2009-01-12 14:06:20 +00:00
parent bf21cdb7e7
commit 405728f669
1 changed files with 14 additions and 1 deletions
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15
doc/src/sgml/ref/select.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/select.sgml,v 1.116 2008/12/31 23:42:56 tgl Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/select.sgml,v 1.117 2009/01/12 14:06:20 petere Exp $
PostgreSQL documentation
-->
@ -1457,6 +1457,19 @@ SELECT distributors.* WHERE distributors.name = 'Westward';
</para>
</refsect2>
<refsect2>
<title><literal>ONLY</literal> and Parentheses</title>
<para>
The SQL standard requires parentheses around the table name
after <literal>ONLY</literal>, as in <literal>SELECT * FROM ONLY
(tab1), ONLY (tab2) WHERE ...</literal>. PostgreSQL supports that
as well, but the parentheses are optional. (This point applies
equally to all SQL commands supporting the <literal>ONLY</literal>
option.)
</para>
</refsect2>
<refsect2>
<title>Namespace Available to <literal>GROUP BY</literal> and <literal>ORDER BY</literal></title>