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From "David W. Van Couvering" <David.Vancouver...@Sun.COM>
Subject Re: BLOB : java.lang.OutOfMemoryError
Date Wed, 31 Aug 2005 18:47:58 GMT
Again, yes, your help would be very much appreciated!  Check out the 
code, get on derby-dev, ask questions, we'll be glad to help.

David

Grégoire Dubois wrote:

>Perhaps it could help : the DBMS Mckoi ( http://mckoi.com/database/ )
>has got a JDBC driver that supports blob streaming over network. Code is
>open.
>
>I tried with IBM DB2, and same as Derby, streaming isn't supported with
>their JDBC driver. For a so big DBMS, I found it odd.
>
>I'm aiming to try Oracle, but I have some difficulties to use it. Does
>anyone knows if the Oracle JDBC supports blob streaming ?
>
>It would be difficult to implement in Derby ? I'm familiar with java
>network developpment. I develop in java for 4 years.
>
>Greg
>
>Le mercredi 31 août 2005 à 11:04 -0700, Satheesh Bandaram a écrit :
>  
>
>>Right... Network server currently sends whole datatype over to client.
>>While this works for most datatypes, since they are limited in size,
>>it may be a problem for clob/blob types. Server needs to be able to
>>stream these large datatypes over the wire on demand, so no matter
>>whether we have a common client or not, server needs to be enhanced.
>>
>>Satheesh
>>
>>Daniel John Debrunner wrote: 
>>    
>>
>>>Michael J. Segel wrote:
>>>
>>>  
>>>      
>>>
>>>>On Wednesday 31 August 2005 10:49, Satheesh Bandaram wrote:
>>>>
>>>>    
>>>>        
>>>>
>>>>>Thanks for the offer.. It would really be great to have more developpers
>>>>>working on Derby. Join the derby-dev alias to participate in the
>>>>>development.
>>>>>
>>>>>Derby embedded driver already has the capability to stream blob/clob,
>>>>>without requiring reading them completely into memory. It would be great
to
>>>>>enhance Derby network server and Derby client to support this kind of
>>>>>behavior.
>>>>>
>>>>>Satheesh
>>>>>
>>>>>      
>>>>>          
>>>>>
>>>>[SNIP]
>>>>
>>>>This may be a dumb question...
>>>>
>>>>Maybe its hindsight, but why isn't the Server Framework either a subclass
or 
>>>>an extension to the embedded driver? Someone had posted that the Network 
>>>>Driver utilized the embedded driver... (Or is that bathtub gin affecting my

>>>>memory?)
>>>>
>>>>I guess it goes more to the point of why not have more focus on a "universal"

>>>>driver?
>>>>    
>>>>        
>>>>
>>>My view
>>>
>>>http://mail-archives.apache.org/mod_mbox/db-derby-dev/200508.mbox/%3c430A43DE.3060803@debrunners.com%3e
>>>
>>>Really the two drivers are doing different things, one has to convert
>>>requests into messages using DRDA over tcp/ip, the other just calls java
>>>methods.
>>>
>>>Dan.
>>>
>>>
>>>
>>>  
>>>      
>>>
>
>  
>

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