[GENERAL] returning inserted rows, derived tables design

2004-10-23 Thread Ruediger Herrmann
Hello again, as I am new to PostgreSQL (great pice of softwork btw) this probably won't be the last question. I access PostgreSQL from Java via the PostgreSQL JDBC driver. I am currently building a little framework that provides basic CRUD operations by mapping class properties to database colum

Re: [GENERAL] Row versioning

2004-10-22 Thread Ruediger Herrmann
thanks for your replay. This approach sounds very comfy. As I read the documentation this is kind of a "transaction sequence" or better a "unique transaction id". Am I right with this? So every row inserted or updated within the same transaction is tagged with the same xmin. Is there any informat

[GENERAL] Row versioning

2004-10-21 Thread Ruediger Herrmann
Hi all, has anyone implemented row versions/timestamps in PostgreSQL or any thoughts on this? Did I hit the right term? What I want to achieve is optimistic concurrency beyound transaction boundaries. When retrieving data I would also retrieve the row version and later on, in a different transact