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Posted to users@cocoon.apache.org by Markus Vaterlaus <mv...@gmail.com> on 2005/07/14 11:22:54 UTC
How to query multiple SQL databases
Dear Cocooners
I'm facing the following problem, and I'm a bit clueless which way is
the best to solve it. Therefore I'm interested on your thoughts and
experiences regarding such a problem.
The problem:
* I have n databases to query
* The query on each database is the same
* The number (n) of databases has to be evaluated at run time
* The databases can be accessed by dblink
* The name of the databases to query are stored in another table
* A single request from a web page should start all queries
* The result of all queries is displayed on one web page
* A single query could look like this
<esql:execute-query>
<esql:query>
SELECT * FROM table_abc@db_name
</esql:query>
<esql:results>
...
</esql:results>
</esql:execute-query>
As a solution I can think of a subquery in SQL or using xsp-logic.
What are your thoughts?
Cheers
--mv
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