ASF_20_SRC_AUTO/src/blocks/databases/samples/xsp/esql.xsp

<?xml version="1.0" encoding="ISO-8859-1"?>

<!-- CVS: $Id: esql.xsp,v 1.3 2003/04/17 20:47:30 haul Exp $ -->

<xsp:page language="java"
          xmlns:xsp="http://apache.org/xsp"
          xmlns:esql="http://apache.org/cocoon/SQL/v2">

  <page>
   <title>A Database Driven XSP Page</title>
    <resources>
       <resource type="file" href="../transform/sql-page.xml.sql">Schema</resource>
       <resource type="doc" href="userdocs/xsp/esql">ESQL</resource>
    </resources>

   <content>

   <esql:connection>
     <esql:pool>personnel</esql:pool>


       <para>
           Below you see all guys from the departments
       </para>

       <esql:execute-query>
         <esql:query>select * from employee</esql:query>
         <esql:results>
           <esql:row-results>
             <para><esql:get-string column="name"/></para>
             <!-- uncomment if you want columns to become tags -->
             <!-- <esql:get-columns/> -->
           </esql:row-results>
         </esql:results>
       </esql:execute-query>

       <hr/>

       <para>
           Below you see just some of the guys
       </para>

       <esql:execute-query>
         <esql:query>select * from employee</esql:query>
         <esql:use-limit-clause>jdbc</esql:use-limit-clause>
         <esql:skip-rows>1</esql:skip-rows>
         <esql:max-rows>2</esql:max-rows>
         <esql:results>
           <esql:row-results>
             <para><esql:get-string column="name"/></para>
           </esql:row-results>
           <esql:previous-results>
             We skipped some.
           </esql:previous-results>
           <esql:more-results>
             There are some more.
           </esql:more-results>
           <para>
             There is a total of <esql:row-count/> employees.
           </para>
         </esql:results>
       </esql:execute-query>

       <hr/>

       <para>
           Below departments and employees are printed.
           Without the grouping feature, the result would look like this:
       </para>

       <esql:execute-query>
         <esql:query>
           SELECT department.name, employee.id, employee.name as empName FROM department, employee
           WHERE department.id = employee.department_id  ORDER BY department.name
         </esql:query>
         <esql:results>
           <esql:row-results>
             <Department>
               <xsp:attribute name='name'><esql:get-string column='name'/></xsp:attribute>
               <h2><esql:get-string column='name'/></h2>
               <para><employee><esql:get-string column='empName'/></employee></para>
             </Department>
           </esql:row-results>
         </esql:results>
       </esql:execute-query>

       <hr/>

       <para>
         This uses the grouping feature in esql.
       </para>

       <esql:execute-query>
         <esql:query>
           SELECT department.name, employee.id, employee.name as empName FROM department, employee
           WHERE department.id = employee.department_id  ORDER BY department.name
         </esql:query>
         <esql:results>
           <esql:row-results>
             <esql:group group-on='name'><!-- grouping -->
               <Department>
                 <xsp:attribute name='name'><esql:get-string column='name'/></xsp:attribute>
                 <h2><esql:get-string column='name'/></h2>
                 <esql:member><!-- grouping -->
                   <para><employee><esql:get-string column='empName'/></employee></para>
                 </esql:member><!--grouping -->
               </Department>
             </esql:group><!-- grouping -->
           </esql:row-results>
         </esql:results>
       </esql:execute-query>

       <hr/>

       <para>
         This uses nested queries.
       </para>

       <esql:execute-query>
         <esql:query>
           SELECT name, id FROM department ORDER BY name
         </esql:query>
         <esql:results>
           <esql:row-results>
               <Department>
                 <xsp:attribute name='name'><esql:get-string column='name'/></xsp:attribute>
                 <h2><esql:get-string column='name'/></h2>
                 
                 <esql:execute-query>
                    <esql:query>
                       select name from employee 
                       where department_id = <esql:parameter type="int"><esql:get-int column="id" ancestor="1"/></esql:parameter>
                    </esql:query>
                 	<esql:results>
                       <esql:row-results>
                 	       <para><employee><esql:get-string column='name'/></employee></para>
                 	   </esql:row-results>
                 	</esql:results>
                 </esql:execute-query>

               </Department>
           </esql:row-results>
         </esql:results>
       </esql:execute-query>

      </esql:connection>

   </content>
  </page>
</xsp:page>