Providing the relevant portions of the mapping file would be a good place to start. :)
Robert On Aug 25, 2010, at 8/2511:10 AM , Julia Filho wrote: > > Hi, > > Is vertical inheritance not supported in Cayenne 3.0? According to the > documentation, vertical inheritance is supported, but I am running into > problems with the generated SELECT query when reading one of the subclasses: > > The generated query is: > > SELECT t0.DATA_COLLECTION_ID, t0.COLLECTION_TYPE_ID, t0.DATA_COLLECTION_ID, > t0.SCHOOL_YEAR, t0.SNAPSHOT_DATE FROM ESDM.K12_DATA_COLLECTION t0 JOIN > ESDM.DATA_COLLECTION t1 ON (t0.DATA_COLLECTION_ID = t1.DATA_COLLECTION_ID) > JOIN ESDM.DATA_COLLECTION_TYPE t2 ON (t1.COLLECTION_TYPE_ID = > t2.COLLECTION_TYPE_ID) WHERE t2.COLLECTION_TYPE_ID = ? [bind: > 1->COLLECTION_TYPE_ID:3] > > > which is a problem because > 1) column COLLECTION_TYPE_ID is in select list for the subclass > (K12_DATA_COLLECTION) but that column is in the super class table > (DATA_COLLECTION), not the subclass > 2) DATA_COLLECTION_ID is in the K12_DATA_COLLECTION select list twice. > > Do you have any suggestions, or is this functionality not yet supported? > > thank you for any assistance you can give > Julie > > > -- > View this message in context: > http://cayenne.195.n3.nabble.com/Vertical-inheritance-tp827636p1334340.html > Sent from the Cayenne - Dev mailing list archive at Nabble.com.
