Attendees: Michael Bouschen, Tilmann Zäschke, Craig Russell Agenda:
1. New patch on JDO-751 "Support for Java8 Optional" https://issues.apache.org/jira/browse/JDO-751 Waiting on experiments with queries. See #3 below. 2. JDO-747 "Behavior of delete() with multiple concurrent Transactions" https://issues.apache.org/jira/browse/JDO-747 Tilmann plans to investigate datanucleus implementation of refresh. Datanucleus prepares objects before loading from the datastore, so this preparation needs to be moved to after loading so the implementation knows whether the object exists in the datastore or not. 3. Experiments with queries and multiple navigations Looks like there is a bug in datanucleus when translating JDOQL to SQL by using LEFT OUTER JOIN semantics when navigating a relationship. @Andy: is there a bug? Clearly, LEFT OUTER JOIN is needed when loading objects with a fetch plan but when doing a query maybe the join should be a straight inner join? @Michael: investigate the != null in addition to == null and see what SQL is generated. In particular there is a difference between !(x == null) and x != null. For example this.manager.manager != null versus !(this.manager.manager == null). Also look at navigating relationships where the foreign key is on the other side. Also look at how fetch plans impact the generated SQL. 4. JDO 3.1: Need to go through change lists in JIRA for 3.1 RC1 and 3.1 to prepare JCP Change Log 5. Other issues Action Items from weeks past: [Oct 30 2015] AI Craig: File a maintenance review with JCP [May 15 2015] AI Craig Spec change for roll back an active transaction when closing a persistence manager (JDO-735) [Apr 17 2015] AI Craig: Oracle spec page on JDO need to be updated once the JCP Maintenance Release for JDO 3.1 is published [Oct 17 2014] AI Matthew any updates for "Modify specification to address NoSQL datastores": https://issues.apache.org/jira/browse/JDO-651? [Feb 28 2014] AI Everyone: take a look at https://issues.apache.org/jira/browse/JDO-712 [Feb 28 2014] AI Everyone: take a look at https://issues.apache.org/jira/browse/JDO-625 [Dec 13 2013] AI Craig file a JIRA for java.sql.Blob and java.sql.Clob as persistent field types [Aug 24 2012] AI Craig update the JIRAs JDO-689 JDO-690 and JDO-692 about JDOHelper methods. In process. Craig L Russell Architect craig.russ...@oracle.com P.S. A good JDO? O, Gasp!
