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From Fernando Padilla <f...@alum.mit.edu>
Subject Re: Default Table/Column Naming conventions; are they configurable?
Date Wed, 22 Oct 2008 18:34:47 GMT
Just found this really nice tutorial.. I'm trying it now, hopefully 
it'll work. :)  Thank you all!

http://www.oracle.com/technology/products/ias/toplink/jpa/howto/id-generation.html

Fernando Padilla wrote:
> Sorry. :)
> 
> I am new to JPA and mostly trying to 'port' our code from using Kodo, 
> while still using the old kodo schema, etc..
> 
> So I've got most of my mappings setup and working, but for reading only, 
> since writing requires a properly setup sequence generator.
> 
> My next step is to setup the JPA "SequenceGenerator" to work like the 
> one we currently have.  We had Kodo setup to use a single global 
> Sequence, for all objects.  It stored it in a single row within a single 
> table (sql below).  So any hints or tips?  Would setting a sequence like 
> this be doable using standard JPA metadata, or would it be OpenJPA 
> specific?  I freely admit that I'm a newb, and will figure it out at 
> some point, but any help, leads, urls to read, or keywords to search 
> would be appreciated, since it will help me go faster. :)
> 
> 
> 
> mysql> desc JDO_SEQUENCE;
> +----------------+------------+------+-----+---------+-------+
> | Field          | Type       | Null | Key | Default | Extra |
> +----------------+------------+------+-----+---------+-------+
> | ID             | tinyint(4) | NO   | PRI | 0       |       |
> | SEQUENCE_VALUE | bigint(20) | YES  |     | NULL    |       |
> +----------------+------------+------+-----+---------+-------+
> 
> 
> mysql> select * from JDO_SEQUENCE;
> +----+----------------+
> | ID | SEQUENCE_VALUE |
> +----+----------------+
> |  0 |      183622200 |
> +----+----------------+
> 
> 
> 
> 
> Pinaki Poddar wrote:
>>> how to override the Sequence generator to behave like the old Kodo.  Any
>> tips or hints on that??
>> Please elaborate on what you intend to do before I can comment.
>>
>>

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