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From: Andrus Adamchik <andrus@objectstyle.org>
Subject: Re: Calling MySql Stored Procedure return no resultset
Date: Mon, 2 Apr 2007 18:55:18 -0400
To: user@cayenne.apache.org

Michael,

Cayenne didn't officially support MySQL stored procedures as of 1.2  
and 2.0. But in fact it is fairly easy to turn it on, based on the  
code used in other adapters. Let me poke around in the next few days  
- I may be able to enable it in 3.0 pretty quickly.

Andrus


On Apr 2, 2007, at 6:45 AM, Michael K wrote:

> Hi,
>
> I've written a stored procedure in mysql db that execute some join  
> queries.
>
> Here is my sample stored procedure look like:
>
> DELIMITER $$
>
> DROP PROCEDURE IF EXISTS `schooler`.`SearchDD` $$
> CREATE PROCEDURE `SearchDD`(IN userInput varchar(200))
> BEGIN
>   CREATE TEMPORARY TABLE sp_mysrctoc12
>   SELECT sourceTable.id as  
> source_id,sourceTable.topic_name,sourceTable.tid as  
> source_tid,targetTable.topic_name as parent_name,
>   sourceTable.scope as  
> source_scope,sourceTable.st_timestamp,sourceTable.tid_table_name as  
> source_tid_table_name,sourceTable.storage_id as  
> source_storage_id,sourceTable.storage_label as source_storage_label
>   FROM mk_search_topics as sourceTable inner join  
> mk_search_topic_association as association on
>    sourceTable.id = association.search_topic_id inner join  
> mk_search_topics as targetTable on
>    targetTable.id = association.target_topic_id
>   where sourceTable.is_root_topic=0
>   and targetTable.is_root_topic=1
>   and sourceTable.storage_label = userInput;
>
> select  
> source_id,topic_name,parent_name,relevance,source_tid,source_tid_table 
> _name,source_storage_id,source_storage_label
>   from sp_mysrctoc12 group by parent_name order by topic_name desc;
>
>   DROP TABLE sp_mysrctoc12;
>
> END $$
>
> DELIMITER ;
>
> Then I mapped the above stored procedure to Cayenne using modeller  
> with one input parameter defined as userInput varchar(200). I also  
> created DBEntity and ObjEntity with readOnly set to true.
> In my java code, I wrote something like this:
>
> DataContext ctxt = sSession.getDataContext();
> ProcedureQuery query = new ProcedureQuery("SearchDD");
> query.addParameter("userInput","abcdef");
> List rows = ctxt.performQuery(query);
> // Display the row size
> System.out.println("row size: "+row.size());
>
> When I run the code in web application, it prints out 'row size: 0'.
> I executed the same stored procedure with the same parameter in  
> mysql command line, it returned 4 rows.
> I wonder if this has something to do with accessing temporary table  
> in multithreaded environment.
>
> I'm currently using Cayenne version 2.0.2 running jdk 1.5, mysql  
> 5.0.18 with jconnector 5.0.5.
>
> Please help.
>
> Thanks,
> Michael
>
>
>
>
>
>
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