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RE: [eclipselink-users] SQL emitted by EclipseLink is searching for anobject with a null primary key
This may be solved in a more recent version. See https://bugs.eclipse.org/bugs/show_bug.cgi?id=243947

From: eclipselink-users-bounces@xxxxxxxxxxx [mailto:eclipselink-users-bounces@xxxxxxxxxxx] On Behalf Of Gschwind, Doug
Sent: Friday, February 06, 2009 4:54 PM
To: eclipselink-users@xxxxxxxxxxx
Subject: [eclipselink-users] SQL emitted by EclipseLink is searching for anobject with a null primary key

Hello everyone,

 

We are using EclipseLink 1.0.1, have set the logging level to FINER, and see that due to a call to EntityManager.flush(), EclipseLink produces a SQL statement that is attempting to find a JPA mapped object whose primary key is null, and that query is then sent to the database for execution. I wouldn’t expect that to ever happen since EclipseLink shouldn’t have to query the database in that case as no entity should exist with a null primary key.

 

Here is an example of that SQL statement. In our data model, SVCID is the primary key of the SERVICE table and does not accept null as a valid value. I should also point out that the SERVICE table houses a single table inheritance hierarchy of classes, where the discriminator column is SVCTYPE.

 

[EL Fine]: 2009.02.06 13:24:06.234--ServerSession(31822876)--Connection(29394618)--Thread(Thread[HTTPThreadGroup-5,5,HTTPThreadGroup])--SELECT SVCID, SVCTYPE, TERMNAME, TERMKEY, PROPERTIES, MATRIXSTRING, LINESTRING, CLINICALDTM, COSIGNPRVDRID, COSIGNIMPPRVDRID, COSIGNDTM, REGSERVICENODEID, TERMID, VISIBLEIND, MODELIND, ENTRYSVCACTIONCD, ENTRYPRVDRID, ENTRYIMPPRVDRID, ENTRYDTM, lineStringClobId, VISITID, patid, PARENTSVCID, PATREGIMENID, ALLERGYLISTID FROM SERVICE WHERE ((SVCID = ?) AND (SVCTYPE IN (?, ?, ?)))

      bind => [null, G, Ay, NKA]

 

Can you think of a reason why this makes sense for EclipseLink to query the database in this case? If so, that might give us a clue as to what to review in some detail.

 

Thanks,

 

Doug Gschwind





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