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2

In version 2.5.2_05 does not work greatest by Date

In version 2.5.2_05 does not work greatest by Date
Issue
2

Incorrect entity returned by query

Incorrect entity returned by query
Forum
2

Restrict by class in query

Restrict by class in query
Forum
2

Safe to monitor listening port by connect/disconnect?

Safe to monitor listening port by connect/disconnect?
Forum
2

Version 2.5.6 enhancement problem solved by updating to version 2.5.7_03

Version 2.5.6 enhancement problem solved by updating to version 2.5.7_03
Manual
2

JPA Primary Key

the database is uniquely identified (and can be retrieved from the database) by the combination of its type ... have their own separate identity. Automatic Primary Key By default the primary key is a sequential 64 bit number (long) that is set automatically by ObjectDB for every new entity object that is stored
Manual
2

Storing JPA Entity Objects

New entity objects can be stored in the database either explicitly by invoking the persist method ... is committed. An IllegalArgumentException is thrown by persist if the argument is not an instance ... is thrown. The exception is thrown either by persist (if that existing entity object is currently
Manual
2

Paths and Types in JPQL and Criteria API

classes) are represented in JPQL by the following types of expressions: Variables - FROM ... and functions (e.g. for strings and for numbers), they can be compared by all six comparison operators ... with an instance of a user defined class (represented by a variable, parameter or prefix path expression
Manual
2

Query Parameters in JPA

) The following method retrieves a Country object from the database by its name: public Country ... method. The setParameter method supports method chaining (by returning the same TypedQuery instance ... . Named parameters can be easily identified in a query string by their special form, which is a colon
Forum
2

system exception occurred during an invocation on EJB GuestDao

$Worker.run(AbstractThreadPool.java:544) at java.lang.Thread.run(Thread.java:744) Caused by: java ... (Thread.java:744) Caused by: java.lang.IllegalStateException: Unable to retrieve ... a failure to find a persistence unit with a null name: Caused by: java.lang.IllegalStateException