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From fred.ts...@widelearning.com
Subject RE: ESQL doc.
Date Fri, 15 Feb 2002 16:10:24 GMT
Here is an example I worked out (with help). Don't know if this works for 2
embedded queries:

  <page>
    <content>
      <esql:connection>
        <esql:pool>pooledConnect</esql:pool>
        <esql:execute-query>
          <esql:query>
            select dept from department_table
          </esql:query>
          <esql:results>
            <esql:row-results>
              <list>
                <dept>
                <esql:get-string column="dept"/>
                </dept>
                <esql:execute-query>
                  <esql:query>
                    select id,name 
                    from employee_table 
                    where department_id = <esql:get-string column="dept"
ancestor="1"/>
                  </esql:query>
                  <esql:results>
                    <esql:row-results>
                      <employee>
                        <name><esql:get-string column="name"/></name>
                      </employee>
                    </esql:row-results>
                  </esql:results>
                  <esql:no-results>
                    <p>Sorry, no results 2!</p>
                  </esql:no-results>
                </esql:execute-query>
              </list>
            </esql:row-results>
          </esql:results>
          <esql:no-results>
            <p>Sorry, no results 1!</p>
          </esql:no-results>
        </esql:execute-query>
      </esql:connection>
    </content>
  </page>

hope this helps.
Fred

-----Original Message-----
From: Olivier Rossel [mailto:lolive@lolive.net]
Sent: 14 February 2002 14:37
To: cocoon-users@xml.apache.org
Subject: ESQL doc.


I read the archives of the mailing-list about ESQL and nested queries.
I read an interesting thing about "ancestor" in the declaration of inner 
requests.
But I can find no documentation at all, about that point.

Anyone has a link?
Any docs has been updated in addition to the page available at:
http://xml.apache.org/cocoon/userdocs/xsp/esql.html ?

My problem is to have something like:

<query1> select foobar, foo, bar from table1;
for each foobar:  { 
   <query2> select * from table2 where field1=<current-value-of foobar>;
    for each barfoo (selected by the previous query, inside the '*'): {
        <query3> select * from table3 where field1=<current-value-of barfoo;
    }
    <get-columns-of query2>
    <get-columns-foo-of query1>
    <get-columns-bar-of query1>
}

I do not plan to use a single complicated SQL request in order to have a 
flat XML
output.



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