persistence@glassfish.java.net

Re: how to map NVARCHAR2 columns

From: Lance J. Andersen <Lance.Andersen_at_Sun.COM>
Date: Thu, 31 Aug 2006 20:28:35 -0400

Marina Vatkina wrote:
> Rochelle Raccah wrote:
>> Mitesh Meswani wrote:
>>
>>>
>>>
>>> Rochelle Raccah wrote:
>>>
>>>> Okay, the verifier bug goes away if a stateless session bean is
>>>> added to the project, so:
>>>>
>>>> 1) For cmp this is still an issue - is there a better thing to
>>>> generate than Object for this case? Can we handle char with the
>>>> formOfUse change?
>>>
>>>
>>> The current cmp runtime is not aware of NCHAR data type and does not
>>> call formOfUse(). It should not be a big effort putting the support
>>> if we are able to distinguish at run time that a given column is of
>>> this type. Then the issue is, since this is not standard jdbc type,
>>> our dbmodel mignt not be able to carry this information. How did you
>>> solve this issue for generation?
>>
>>
>> Right. We didn't solve it for generation - that's what the nb bug is
>> about =). Any advice would be appreciated.
>
> It should be treated as a String. N means (extra?) unicode support for
> the type
It means National Character Set Support. this is not exactly unicode
support .it is an implementation defined character set per the Ansi
specification.
> after it.
>
> -marina
>
>>
>> Thanks,
>> Rochelle
>>
>>
>>>
>>> Thanks,
>>> Mitesh
>>>
>>>> 2) For JPA, we generate
>>>> @Id
>>>> @Lob
>>>> @Column(name = "GENRE", nullable = false)
>>>> private Object genre;
>>>> It verifies correctly, but is it okay?
>>>>
>>>> Thanks,
>>>> Rochelle
>>>>
>>>> Rochelle Raccah wrote:
>>>>
>>>>> Both, I think. Right now, the generated JPA has fields of type
>>>>> Object as well, but the verifier is not working for it:
>>>>> <https://glassfish.dev.java.net/issues/show_bug.cgi?id=1049>
>>>>>
>>>>> Rochelle
>>>>>
>>>>> Marina Vatkina wrote:
>>>>>
>>>>>> Rochelle,
>>>>>>
>>>>>> The NB bug talks about cmp - is it cmp or JPA (or both) related
>>>>>> question?
>>>>>>
>>>>>> thanks,
>>>>>> -marina
>>>>>>
>>>>>> Peter Krogh wrote:
>>>>>>
>>>>>>> Supporting 'N' Types requires Oracle Specific JDBC calls, that
>>>>>>> are not currently supported by TopLink Essentials. Support for
>>>>>>> N types sounds like a good feature request to be added to the
>>>>>>> issue tracker.
>>>>>>>
>>>>>>> Note: Adding this support may require changes to the build
>>>>>>> system to compile classes with references to Oracle JDBC
>>>>>>> specific classes.
>>>>>>> -----Original Message-----
>>>>>>> From: Rochelle.Raccah_at_Sun.COM [mailto:Rochelle.Raccah_at_Sun.COM]On
>>>>>>> Behalf
>>>>>>> Of Rochelle Raccah
>>>>>>> Sent: Tuesday, August 29, 2006 8:29 PM
>>>>>>> To: persistence_at_glassfish.dev.java.net
>>>>>>> Subject: how to map NVARCHAR2 columns
>>>>>>>
>>>>>>>
>>>>>>> For background, please see
>>>>>>> <http://www.netbeans.org/issues/show_bug.cgi?id=68997>.
>>>>>>>
>>>>>>> The question is, are NVARCHAR2 columns allowed in a schema? If
>>>>>>> so, how
>>>>>>> can they be mapped? And, do we have a way to generate the
>>>>>>> formOfUse
>>>>>>> calls if necessary?
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Rochelle
>>>>>
>>>>>
>>>>>
>>>>>