Category Archives: JPQL

JDO 3.2 JDOQLTypedQuery

JDO 3.2 is now standardising what we initially developed as a DataNucleus extension for JDO querying, namely typesafe queries. In DataNucleus upto and including v4.1 it was referred to as JDOQL Typesafe Query, and in JDO 3.2 (DataNucleus v4.2+) it … Continue reading

Posted in Criteria, DataNucleus, JDO, JDOQL, JPA, JPQL, Typesafe | Leave a comment

Persistence to Neo4j graph datastores

Whilst DataNucleus JDO/JPA already supported persistence and querying of objects to/from RDBMS (all variants), ODBMS (NeoDatis), Documents (XML, Excel, ODF), Web (JSON), Document-based (MongoDB), Map-based (HBase, AppEngine, Cassandra), as well as others like LDAP and VMForce, it was clear that … Continue reading

Posted in JDO, JDOQL, JPA, JPQL, Neo4j, Persistence | 7 Comments

"JPQL2" becomes the default JPQL implementation for RDBMS

The rewrite of JPQL for RDBMS, formerly known as “JPQL2” is now the default JPQL implementation in DataNucleus SVN trunk. It passes the JPA TCK completely, and so no reason not to swap over to using it now. So if … Continue reading

Posted in DataNucleus, JPA, JPQL | 1 Comment

JPQL2

As mentioned earlier DataNucleus querying capabilities are being progressively rewritten, making use of a “generic” query compilation. In the previous post I mentioned a new implementation of JDOQL. This now implements the vast majority of querying capabilities required with one … Continue reading

Posted in DataNucleus, java, JDO, JDOQL, JPA, JPQL, Persistence | Leave a comment