I'm wondering which algorithm is recommend? As you said, identity is not so good. The remains are only Guid related algorithm. Oracle doesn't support guid data type, so may we choose uuid.hex? and choose guid.comb when the database is ms sql?
On Mon, Nov 24, 2008 at 4:26 AM, Steve Wagner <[EMAIL PROTECTED]> wrote: > > I think this text would be very helpful when it would be inserted as > warning to the NH documentation. > > Fabio Maulo schrieb: >> Hi Jon.Do you have some write where somebody explain why identity is so good >> ? >> >> Using ORM identity is not recommended because the only way to know the ID of >> the entity is writing the entity itself in a safe state and hopefully inside >> a transaction and, after the INSERT INTO, read, in some way, the result to >> know the ID. >> There are various other reasons... for example try a migration. >> Take a look here >> http://nhusers.googlegroups.com/web/WhitePaper_Mapping_Objects_To_Relational_Databases.pdf >> >> Please if you find something where somebody explain why identity is so good >> instead a simple int, let me know. >> >> 2008/11/7 Jon Palmer <[EMAIL PROTECTED]> >> >>> I've seen this comment before but never found a good explanation of why >>> identity is not recommended. Is there a good write up of the problem and >>> what the various solutions are? >>> >>> >>> >>> Thanks >>> >>> Jon >>> >>> >>> >>> *From:* [email protected] [mailto:[EMAIL PROTECTED] *On >>> Behalf Of *Fabio Maulo >>> *Sent:* Friday, November 07, 2008 8:28 AM >>> *To:* [email protected] >>> *Subject:* [nhusers] Re: Second Level Cache on Insert >>> >>> >>> >>> 2008/11/7 Ayende Rahien <[EMAIL PROTECTED]> >>> >>> And, in general, it is not recommended to use identity for other reasons. >>> >>> usage of batching is one good reason >>> >>> >>> >>> It is an hard and heavy battle to fight. >>> >>> >>> >>> -- >>> Fabio Maulo >>> >>> >> >> > > > > -- Regards, Karron --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
