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From Andrus Adamchik <and...@objectstyle.org>
Subject Re: Parameterized Query in DataMap
Date Wed, 03 May 2006 17:09:57 GMT
Hi Chandni,

to accept parameters, the WHERE part of the query has to look like this:

   WHERE version_name=$version AND d.parent=$parent

And the code where you are setting the parameters - like this  
(without a '$', just the name):

Map params = new HashMap();
params.put("version","Student_Example1");
params.put("parent","<Fact-107>");

Cheers,

Andrus

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On May 3, 2006, at 12:52 PM, Chandni Jain wrote:

> Hello,
>
>
>
> I am trying to use Cayenee to connect to mysql database. I wanted  
> to create
> a parameterized query and store it in DataMap so I can reuse the  
> query.
> Please can you tell me how I should specify the query and how do I  
> map the
> parameters.
>
> Currently this is what I am doing:
>
> In the  datamap
>
> <query name="ParamDecompQuery"
> factory="org.objectstyle.cayenne.map.SQLTemplateBuilder" root="obj- 
> entity"
> root-name="DesignModule">
>
>             <sql
> adapter-class="org.objectstyle.cayenne.dba.mysql.MySQLAdapter"><! 
> [CDATA[SELE
> CT m.* FROM
>
>   design_module m
>
>   JOIN design_modulerefinementrelation d ON m.`factid`=d.child AND
> m.version=d.version
>
>   JOIN __versions__ v ON m.version=v.id
>
> WHERE version_name=? AND d.parent=?]]></sql>
>
>       </query>
>
>
>
> In the java code
>
>
>
> SQLTemplate DecomParamQuery = (SQLTemplate)
> context.getEntityResolver().lookupQuery("ParamDecompQuery");
>
>                         Map params = new HashMap();
>
>                         params.put("$version","Student_Example1");
>
>                         params.put("$parent","<Fact-107>");
>
>                         SQLTemplate newDecomParamQuery =
> DecomParamQuery.queryWithParameters(params);
>
>
>
> When I try to run the application I get an error that the parameter  
> 1 is not
> set. If I use $ version instead on '?' in data map I get an error  
> on invalid
> column name.
>
>
>
> Chandni
>
>
>


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