> I can remember a legacy persistence framework that was able to retry > the insert statement with a "second-try generated PK" just > for the case > the currently generated one has already been inserted by > another process.
It would certainly be possible to implement such a thing in OpenJPA, but there is no such feature in place currently. If you're decommissioning the old system, one easy way to make things work would be to use a hi-lo table with per-class entries (the class-table alias), and then manually configure the start value in the table (using the main() method in the org.apache.openjpa.jdbc.kernel.ClassTableJDBCSeq) to be the highest existing PK value for each table. -Patrick -- Patrick Linskey BEA Systems, Inc. _______________________________________________________________________ Notice: This email message, together with any attachments, may contain information of BEA Systems, Inc., its subsidiaries and affiliated entities, that may be confidential, proprietary, copyrighted and/or legally privileged, and is intended solely for the use of the individual or entity named in this message. If you are not the intended recipient, and have received this message in error, please immediately return this by email and then delete it. > -----Original Message----- > From: Hans J. Prueller [mailto:[EMAIL PROTECTED] > Sent: Tuesday, February 13, 2007 9:01 AM > To: open-jpa-dev@incubator.apache.org > Subject: AW: AW: Using @GeneratedValue for IDs on already > existing tables > > thanks for this link but this section only describes the different > algorithms that are provided to get the generated value - it does > not mention the case what happens if we try to save a new persistent > entity with a generated PK value that already exists in the DB? > > I can remember a legacy persistence framework that was able to retry > the insert statement with a "second-try generated PK" just > for the case > the currently generated one has already been inserted by > another process. > > does nobody else have a similar requirement? > > hans > > > -----Ursprüngliche Nachricht----- > > Von: Abe White [mailto:[EMAIL PROTECTED] > > Gesendet: Dienstag, 13. Februar 2007 17:35 > > An: open-jpa-dev@incubator.apache.org > > Betreff: Re: AW: Using @GeneratedValue for IDs on already > existing tables > > > > > does openJPA provide the strategy to re-generate another value for > > > the PK > > > or do we have to manually deal with this case? > > > > http://incubator.apache.org/openjpa/docs/latest/manual/ > > manual.html#ref_guide_sequence > > > ______________________________________________________________ > _________ > > Notice: This email message, together with any attachments, > may contain > > information of BEA Systems, Inc., its subsidiaries and > affiliated > > entities, that may be confidential, proprietary, > copyrighted and/or > > legally privileged, and is intended solely for the use of > the individual > > or entity named in this message. If you are not the > intended recipient, > > and have received this message in error, please immediately > return this > > by email and then delete it. > >
