Proposal:
I will open a JIRA issue and prepare a pull request. All modifications will
be done in DB2 specific classes. After publishing the pull request we can
continue to discuss. Is this ok ?


On Tue, Aug 11, 2015 at 2:19 PM, Andrea Aime <andrea.a...@geo-solutions.it>
wrote:

> On Tue, Aug 11, 2015 at 1:40 PM, Christian Mueller <
> christian.muel...@os-solutions.at> wrote:
>
>> Hi Andrea
>>
>> At the moment I do not have the knowledge for a general implementation
>> and I am sure SQLServer,Oracle and DB2 have some differences. I would
>> prefer to implement the logic in DB2FilterToSQL. If somebody wants to
>> introduce this feature for another DB we can move common components to
>> FilterToSQL.
>>
>> My idea was to enable the logic store wide and apply the logic to all
>> tables. (You can switch between the geotools and the db temporal model). If
>> store wide is not possible (API change), I could use the system catalog to
>> decide.
>> Store wide is easier to implement, using the system catalog would be more
>> correct but I am not sure if this is possible. (And if it is, it will be
>> quite complicated). Another simple approach would be to look at the DB2
>> version number, if >= 10 use the DB2 model for all tables.
>>
>> I would prefer the global parameter. If this is not possible I would try
>> using the version number.
>>
>
> The global parameter is not an API change, so no problem, it will just be
> a bit rigid, but it's not the first case (e..g, the "fast bbox" and
> "geometry simplifications" in the postgis store are also good candidates
> for being supported per type).
>
> Cheers
> Andrea
>
>
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-- 
DI Christian Mueller MSc (GIS), MSc (IT-Security)
OSS Open Source Solutions GmbH
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