Descriptor query manager and custom PL/SQL call for the data update

Question

hi all,
in the application, I'm currently working on, the operations for the data INSERT/UPDATE /DELETE are allowed only by means of PL/SQL function. Using the descriptor's query manager I'm trying to modify default behavior of TopLink and execute PL/SQL when there is a request to modify the data.
DescriptorQueryManager entityQueryManager = session.getClassDescriptor(MyEntity.class).getQueryManager();
StoredFunctionCall call = new StoredFunctionCall();
call.setUsesBinding(true);
call.setProcedureName("merge_record");
call.setResult("id", Integer.class);
call.addNamedArgument("cbic_id", "id"); // MyEntity.getId() – works!
call.addNamedArgument("publication_flag", "publicationFlag"); // MyEntity.getPublicationFlag () – works!
call.addNamedArgument("routing_id", "routing"); // MyEntity.getRouring() – works!
call.addNamedArgument("issue_id", "issue"); // MyEntity.getIssue() – works!
call.addNamedArgument("country_id", "country"); // MyEntity.getCountry() – works!
entityQueryManager.setInsertCall(call);
entityQueryManager.setUpdateCall(call);
entityQueryManager.setDeleteCall(call);
the problem:
when I call: MyEntity savedObject = (MyEntity) UnitOfWork.deepMergeClone(entity);
the binding doesn’t happen and I see following logs:
[TopLink Finest]: 2008.02.01 02:51:41.534--UnitOfWork(22937783)--Thread(Thread[AWT-EventQueue-0,6,main])--Merge clone xxx.Entity[id=2000]
[TopLink Warning]: 2008.02.01 02:51:41.550--ClientSession(8454539)--Thread(Thread[AWT-EventQueue-0,6,main])--Missing Query parameter for named argument: id null will be substituted. (There is no English translation for this message.)
[TopLink Warning]: 2008.02.01 02:51:41.550--ClientSession(8454539)--Thread(Thread[AWT-EventQueue-0,6,main])--Missing Query parameter for named argument: publicationFlag null will be substituted. (There is no English translation for this message.)
[TopLink Warning]: 2008.02.01 02:51:41.565--ClientSession(8454539)--Thread(Thread[AWT-EventQueue-0,6,main])--Missing Query parameter for named argument: routing null will be substituted. (There is no English translation for this message.)
[TopLink Warning]: 2008.02.01 02:51:41.565--ClientSession(8454539)--Thread(Thread[AWT-EventQueue-0,6,main])--Missing Query parameter for named argument: issue null will be substituted. (There is no English translation for this message.)
[TopLink Warning]: 2008.02.01 02:51:41.565--ClientSession(8454539)--Thread(Thread[AWT-EventQueue-0,6,main])--Missing Query parameter for named argument: country null will be substituted. (There is no English translation for this message.)
[TopLink Fine]: 2008.02.01 02:51:41.565--ClientSession(8454539)--Connection(6233000)--Thread(Thread[AWT-EventQueue-0,6,main])--BEGIN ? := merge_record(cbic_id=>?, publication_flag=>?, routing=>?, issue=>?, country=>?); END;
bind => [=> id, null, null, null, null, null] – WHY?
Calling straight forward the same PL/SQL block using:
DataModifyQuery updateQuery = new DataModifyQuery();
updateQuery.setCall(call);
updateQuery.shouldBindAllParameters();
and passing parameters as Vector works very well.
Could you please help me to fix the binding problem when I’m using the PL/SQL with Query Manager?
regards,

Answer 1

Hello,
This is fairly common. Since the database is case insensitive (mostly) field names passed in don't really matter much. Unfortunately, java string comparisons are case sensitive, so if you db column for the getId() property is defined as uppercase "ID" it will not match to the lower case "id" defined in the
call.addNamedArgument("cbic_id", "id");
This will cause TopLink to get null when it looks for the "id" field in the row it builds from your MyEntity instance.
Matching the case exactly will resolve the issue.
Best Regards,
Chris