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docd select expressions 

git-svn-id: https://svn.jboss.org/repos/hibernate/trunk/Hibernate3/doc@6405 1b8cb986-b30d-0410-93ca-fae66ebed9b2
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Gavin King 2005-04-13 04:50:32 +00:00
parent 9ca1368296
commit d628cb66a9
1 changed files with 18 additions and 6 deletions
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24
reference/en/modules/query_hql.xml
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@ -299,14 +299,26 @@ from Cat cat group by cat]]></programlisting>
</itemizedlist>
<para>
The <literal>distinct</literal> and <literal>all</literal> keywords may be used and have
the same semantics as in SQL.
You may use arithmetic operators, concatenation, and recognized SQL functions
in the select clause:
</para>
<programlisting><![CDATA[select cat.weight + sum(kitten.weight)
from Cat cat
join cat.kittens kitten
group by cat.id, cat.weight]]></programlisting>
<programlisting><![CDATA[select firstName||' '||initial||' '||upper(lastName) from Person]]></programlisting>
<para>
The <literal>distinct</literal> and <literal>all</literal> keywords may be used and
have the same semantics as in SQL.
</para>
<programlisting><![CDATA[select distinct cat.name from Cat cat
select count(distinct cat.name), count(cat) from Cat cat]]></programlisting>
</sect1>
<sect1 id="queryhql-polymorphism">
@ -492,13 +504,13 @@ where log.item.class = 'Payment' and log.item.id = payment.id]]></programlisting
</listitem>
<listitem>
<para>
string concatenation ||
string concatenation <literal>...||...</literal> or <literal>concat(...||...)</literal>
</para>
</listitem>
<listitem>
<para>
SQL scalar functions like <literal>upper()</literal> and
<literal>lower()</literal>
SQL scalar functions like <literal>upper()</literal>, <literal>lower()</literal>,
<literal>abs()</literal>
</para>
</listitem>
<listitem>