Re: caching problem ?

From: Andrus Adamchik (
Date: Wed Mar 15 2006 - 10:18:48 EST

  • Next message: Andrus Adamchik: "Re: bug in objectId generation?"

    You won't see an uncommitted object in SelectQuery results. This has
    nothing to do with SelectQuery caching. One possible solution to that
    is manual transaction management (I suggest you use M11 for that ...
    if it doesn't work - nightly build, as there were some recent

    (see "User-Defined Transaction Scope" in the bottom). You can
    implement that "try" block from that Wiki example as follows:

       * insert
       * commit DataContext (this will flush changes to DB, but will NOT
    commit DB transaction because it is "external").
       * read from tableA
       * insert the just read data into tableB
       * commit DataContext (again this will be just flush, not commit)


    On Mar 15, 2006, at 2:18 PM, Lothar Krenzien wrote:

    > Hi ,
    > I've notified a problem which I don't really understand.
    > I'm doing an insert into tableA, read from tableA and insert the
    > data into tableB. Because I want to save all or nothing I commit
    > the transaction after the last insert. But it looks like that
    > insert data in tableA are not found after the insert because the
    > data in tableB were not inserted. In the logfile I can see that the
    > select don't return any data. When I commit the transaction after
    > inserting into tableA it seems to work. But that's not what I want.
    > So could it be a caching problem ? And I get no error from the
    > database.
    > Here's an example of what I want to do:
    > insert into tableA
    > read from tableA
    > insert the just read data into tableB
    > commit
    > cayenne 1.2 M10 + MSSQL 2000 + jtds
    > Thanks, Lothar
    > P.S: I've just read about caching in the cayenne user guide (http://
    > I
    > there a way to set the caching policy once for all queries ? In the
    > cayenne modeler the option 'Use shared cache' is set for the used
    > domain node.
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