openjpa

What is the OpenJPA configuration to view SQL query executed in a database? I would like to view the query with all parameters executed in log or console instead of viewing the JPQL query <property name="openjpa.Log" value="SQL=Trace" /> Enables logging of all SQL statements, minus parameter values. <property name="openjpa.ConnectionFactoryProperties" value="PrintParameters=true" /> Enables logging of SQL parameters. Logging documentation If you're using log4j, you can setup your log4j.properties file as follows, which will display both the native SQL query and any parameters: log4j.rootLogger

What could cause the CriteriaQuery orderBy method stop working? Here are the implementations: OpenJPAEntityManager kem = OpenJPAPersistence.cast(entityManager()); kem.getFetchPlan().clearFetchGroups(); kem.getFetchPlan().addFetchGroup("order_search"); CriteriaBuilder builder = kem.getCriteriaBuilder(); CriteriaQuery<Order> query = builder.createQuery(Order.class); Root<Order> order = query.from(Order.class); query.select(order); Predicate main_condition = buildWhereClause(builder, query, order, target_states, orderDate_from, orderDate_to, dueDate_from, dueDate_to, username); query.where(main

I am working on a Java application that requires horizontal partitioning of data in different PostgreSQL servers. I would like to use a JPA framework and Spring for transaction management. The most popular frameworks for sharding data with JPA seem to be Hibernate Shards , which appears to be no longer in development, and OpenJPA Slice , which does not support virtual shards (one of my requirements). Are there any other options that I'm missing, or a way to get around the OpenJPA limitation? Thanks in advance for your input! You can have a look at Sharding-JDBC , it is a JDBC driver for shard

I am using JPA2 with it's Criteria API to select my entities from the database. The implementation is OpenJPA on WebSphere Application Server. All my entities are modeled with Fetchtype=Lazy. I select an entity with some criteria from the database and want to load all nested data from sub-tables at once. If I have a datamodel where table A is joined oneToMany to table B, I can use a Fetch-clause in my criteria query: CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<A> cq = cb.createQuery(A.class); Root<A> root = cq.from(A.class); Fetch<A,B> fetch = root.fetch(A_

I have a dumb question. It would be great if this could be done, but I am not holding my breath. I need a single column from a table linked to my JPA entity to be a collection in said JPA entity. Is there any way, that I can just get back that column alone that is related to that entity, instead of having to get back an entire table (which could be very costly?) Can I perform a query inside that JPA entity that will be performed and loaded eagerly into a collection? I am trying to avoid having to make several calls to the database by just executing a couple of queries. What are your thoughts

Posting this here as I wasn't seeing much interest here: http://www.java-forums.org/jpa/96175-openjpa-one-many-within-one-many-merge-problems.html Trying to figure out if this is a problem with OpenJPA or something I may be doing wrong... I'm facing a problem when trying to use OpenJPA to update an Entity that contains a One to Many relationship to another Entity, that has a One to Many relationship to another. Here's a quick example of what I'm talking about: @Entity @Table(name = "school") public class School { @Column(name = "id") protected Long id; @Column(name = "name") protected String

I'm interested in logging SQL statements. I've tried two approaches, with log4j2 and writing to file, both in vain. I've added following lines to persistence.xml <property name="openjpa.Log" value="SQL=TRACE" /> <property name="openjpa.Log" value="File=openjpa_ra.log" /> <property name="openjpa.ConnectionFactoryProperties" value="PrintParameters=true" /> and I'm expecting it to write to the file, but nothing happened. On the other hand, when I specify <property name="openjpa.Log" value="log4j" /> instead of file line, nothing is changes in my log4j2 files, despite having configured appender.