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Re: [eclipselink-users] named query + skip null parameters
|
You can do: native, JPQL, expressions....tons of different ways.
Check: http://wiki.eclipse.org/Introduction_to_EclipseLink_Queries_(ELUG)#Query_Languages
If I understand you want to only use JPQL, that way you can switch
between hibernate, eclipselink, etc. There's nothing stopping you from
creating a dynamic JPQL query you don't have to do named ones.
On Fri, May 9, 2008 at 10:16 AM, Leon Derks <leon.derks@xxxxxxxxxx> wrote:
>
> Thanks for the answer,
>
> I don't want any Hibernate or Eclipselink specific code, that is why I used
> named queries.
>
> Or is there a way to dynamically build a query with JPA?
>
> Leon
>
>
> Tim Hollosy wrote:
>>
>> I think you get no results because column = null is not valid, you'd
>> need to do column is null.
>>
>> Anyway, I don't think a named query is the proper way to go about a
>> custom search.
>>
>> I'd either use the expression API or a dynamically build query.
>>
>> /tim
>>
>> On Fri, May 9, 2008 at 9:08 AM, Leon Derks <leon.derks@xxxxxxxxxx> wrote:
>>
>>>
>>> Hi
>>>
>>> Yes I tried executing the query with the null params, but then no results
>>> are returned.
>>>
>>> For example when productCategory is null, I want to get all items.
>>> So skipping the (where productCategory = :productCategory) part in my
>>> named
>>> query.
>>>
>>> There are three search params, with can all be null. So we have 8
>>> different
>>> search situations.
>>> I can make 8 different queries, but this is to complex I think.
>>>
>>> Therefore I hoped there was I way to skip the null parts in a named
>>> query.
>>>
>>> How is this normally done?
>>>
>>> Leon
>>>
>>> Tim Hollosy wrote:
>>>
>>>>
>>>> Did you try setting them to null?
>>>>
>>>> On Fri, May 9, 2008 at 4:08 AM, Leon Derks <leon.derks@xxxxxxxxxx>
>>>> wrote:
>>>>
>>>>
>>>>>
>>>>> Hello
>>>>>
>>>>> I have a named query with three parameters.
>>>>>
>>>>> These parameters are search parameters and can be null.
>>>>>
>>>>> When I don't set the parameter in my DAO I get the following error:
>>>>> "Query
>>>>> argument productName not found in the list of parameters provided
>>>>> during
>>>>> query execution"
>>>>>
>>>>> Is there a way to ignore the null parameters in my named query and only
>>>>> use
>>>>> the parameters that are not null?
>>>>>
>>>>> Leon
>>>>> _______________________________________________
>>>>> eclipselink-users mailing list
>>>>> eclipselink-users@xxxxxxxxxxx
>>>>> https://dev.eclipse.org/mailman/listinfo/eclipselink-users
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>
>>> _______________________________________________
>>> eclipselink-users mailing list
>>> eclipselink-users@xxxxxxxxxxx
>>> https://dev.eclipse.org/mailman/listinfo/eclipselink-users
>>>
>>>
>>
>>
>>
>>
>
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> eclipselink-users@xxxxxxxxxxx
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>
--
./tch