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Re: ANN: D2R Server and D2RQ V0.7 released

From: Christian Becker <chris@beckr.org>
Date: Wed, 12 Aug 2009 11:16:10 +0200
Cc: Richard Cyganiak <richard@cyganiak.de>, d2rq-map-devel@lists.sourceforge.net, public-lod@w3.org
Message-Id: <A37734D1-04FF-4693-BF0C-B2B7A66E1B7F@beckr.org>
To: Kingsley Idehen <kidehen@openlinksw.com>
Hi Kingsley,
JDBC indeed covers about 95% of the functionality we need. However, we  
need database-specific code to do things like limiting rows,  
determining optimal fetch sizes, or filtering out system tables that  
shouldn't be used for vocabulary mapping.
As far as metadata is concerned, we do want to move towards using JDBC  
to do most of the column type mapping, but we decided to postpone this  
step as it will likely break current setups.

Cheers,

Christian

On Aug 11, 2009, at 8:19 PM, Kingsley Idehen wrote:

> Richard Cyganiak wrote:
>> Kingsley,
>>
>> On 11 Aug 2009, at 18:45, Kingsley Idehen wrote:
>>> Why isn't D2R JDBC and/or ODBC based, in a generic sense? Both  
>>> APIs provide enough Metadata oriented APIs for enabling a more  
>>> RDBMS agnostic variant of D2R.
>>
>> Glad to inform you that D2RQ is JDBC based, and has been since 2004.
> Yes, but the problem is that is doesn't use JDBC metadata calls to  
> ensure it simply works with any JDBC Driver.
>
> Of course we've tested it for JDBC against Virtuoso eons ago,  
> something we do instinctively re. all JDBC or ODBC based apps.
>
> If JDBC is done right, you wouldn't have to make statements like:  
> SQL Server support added (which make my hair stand). I am sure you  
> know, JDBC Drivers have existed for SQL Server for eons etc..
>
> To conclude, are you implying the following re. D2R:
>
> 1. JDBC support has evolved since 2004?
> 2. It now works with any JDBC Driver for any ANSI SQL compliant RDBMS.
>
> Kingsley
>>
>> Best,
>> Richard
>>
>>
>>
>>>
>>> As I am sure you can imagine, my hair stands (literally) whenever  
>>> I encounter RDBMS specific client apps. :-)
>>>
>>> -- 
>>>
>>>
>>> Regards,
>>>
>>> Kingsley Idehen          Weblog: http://www.openlinksw.com/blog/ 
>>> ~kidehen
>>> President & CEO OpenLink Software     Web: http://www.openlinksw.com
>>>
>>>
>>>
>>>
>>>
>>
>>
>
>
> -- 
>
>
> Regards,
>
> Kingsley Idehen	      Weblog: http://www.openlinksw.com/blog/~kidehen
> President & CEO OpenLink Software     Web: http://www.openlinksw.com
>
>
>
Received on Wednesday, 12 August 2009 09:17:02 UTC

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