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Posted to users@cocoon.apache.org by Götz Botterweck <bo...@uni-koblenz.de> on 2001/06/13 15:00:12 UTC
C2: recommended method for accessing Database, esp. for nested queries?
I'm already using the ESQL. Now I'd like to do nested queries. Somewhat
like that
QUERY
retrieve departments
FOR EACH department d
retrieve all members of d
/FOR EACH
/QUERY
I've seen the file ../docs/samples/sql/sql-page.xml with the
<anchestor-value ... > tag. Is something similar possible with ESQL?
Thanks for any hints.
GB
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Re: C2: recommended method for accessing Database, esp. for nested
queries?
Posted by Donald Ball <ba...@webslingerZ.com>.
On Wed, 13 Jun 2001, [iso-8859-1] G�tz Botterweck wrote:
> I'm already using the ESQL. Now I'd like to do nested queries. Somewhat
> like that
>
> QUERY
> retrieve departments
> FOR EACH department d
> retrieve all members of d
> /FOR EACH
> /QUERY
>
> I've seen the file ../docs/samples/sql/sql-page.xml with the
> <anchestor-value ... > tag. Is something similar possible with ESQL?
yes:
<?xml version="1.0"?>
<?cocoon-process type="xsp"?>
<xsp:page
xmlns:xsp="http://www.apache.org/1999/XSP/Core"
xmlns:esql="http://apache.org/cocoon/SQL/v2"
>
<page>
<esql:connection>
<esql:driver>org.postgresql.Driver</esql:driver>
<esql:dburl>jdbc:postgresql://localhost/test</esql:dburl>
<esql:username>test</esql:username>
<esql:password>test</esql:password>
<esql:execute-query>
<esql:query>select id,name from department_table</esql:query>
<esql:results>
<header>header info</header>
<esql:row-results>
<department>
<id><esql:get-int column="id"/></id>
<name><esql:get-string column="name"/></name>
<esql:execute-query>
<esql:query>select name from user_table where department_id = <esql:parameter type="int"><esql:get-int ancestor="1" column="id"/></esql:parameter></esql:query>
<esql:results>
<esql:row-results>
<user><esql:get-string column="name"/></user>
</esql:row-results>
</esql:results>
<esql:no-results>
<user>No employees</user>
</esql:no-results>
</esql:execute-query>
</department>
</esql:row-results>
<footer>footer info</footer>
</esql:results>
</esql:execute-query>
</esql:connection>
</page>
</xsp:page>
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