Prepared Statement Caching

["Swayam Vemuri -X (swvemuri - WIPRO at Cisco)" <sw...@cisco.com>]

Hi

 

Can anyone please let me know whether OJB supports below

And how it does each of the below

 

(a)     Does it support select-before-update?

(b)     Does it implement prepared statement caching?

(c)     Does it support Role based access?

(d)     Does it support views?

 

Thanks

Swayam

Re: Prepared Statement Caching

[Armin Waibel <ar...@apache.org>]

Hi Swayam,

sorry for the late reply.

Swayam Vemuri -X (swvemuri - WIPRO at Cisco) wrote:
> Hi
> 
>  
> 
> Can anyone please let me know whether OJB supports below
> 
> And how it does each of the below
> 
>  
> 
> (a)     Does it support select-before-update?
>

Sorry nope. You have to do this by your own. We support optimistic (and 
pessimistic) locking
http://db.apache.org/ojb/docu/guides/lockmanager.html
but on update always all fields will be written to DB (except if you are 
using different metadata profiles, but this won't help to detect changed 
fields)
http://db.apache.org/ojb/docu/guides/metadata.html


> (b)     Does it implement prepared statement caching?

Yep, if you use the DBCP based ConnectionFactory implementation.
http://db.apache.org/ojb/docu/guides/connection.html


> 
> (c)     Does it support Role based access?

You have to build this upon OJB. OJB is only a O/R mapper.


> (d)     Does it support views?

It's not official documented, but some OJB-user using views within OJB. 
Please search the user-list.

regards,
Armin

> 
>  
> 
> Thanks
> 
> Swayam
> 
> 

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