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Query all objects that implements a given interface - is that possible?

Hi, I am trying query one of my DB - for all object types that implement a given interface.     TypedQuery<Signal_Interface> query =         em.createQuery("SELECT bk FROM Signal_Interface bk ... .createQuery("SELECT bk FROM Object bk WHERE bk instanceof Signal_Interface",             Signal

Adding multi part path index on non-embedable object member

Is there a way to add single member index on members of a object member which is not configured embedable but is/are mapped by id like the two members below. @Entity public class Customer ... { ... } There is a documentation says it works on embedded objects only. So since it reference only, what is suggested

Problem with merging / persisitng objects with @Embeddable field

Hi, After migration to version 2.4.2_01, I have noticed a strange problem with persisting object with field that contains @Embeddable object. Please check attached exception. Relation between entities looks like this: @Entity public class ProductKit extends BaseEntity implements Serializable

JPA CriteriaQuery -- Iterate Expression<List<Object>>

Hi, I am new to JPA and in particular the CriteriaQuery API. I have a simple CriteriaQuery where I pattern match a simple search String against field entires in a Person entity... i.e. the searchString is always decorated with %searchString%. The Person object can contain many Record objects. I

Entity object parameter in Explorer parameter

Hello, I cannot set an entity object in a parameter for a bulk update in the explorer query execution. The format Entity#001 works well for the parameter in the WHERE clause, but it doesn't work in the SET clause. For example, in the query: UPDATE Account dep SET dep.status=:a WHERE dep.status=:b

JPQL: Update fails using external object param

Let's suppose we have two objects and one is the key to another: Language{id:Integer,language: String} Book{id:Integer, title: String, language: Language} This select works: SELECT b from Book b where b.language.language="en" // it returns some records But when I use the same condition

impossible to drop a table with 50 million objects

these objects in batches, using several transactions, each transaction will delete the results

Why can't we persist an object with a field of type EnumMap in ObjectDB?

Hi, Is there a reason why we can't persist an object with a field of type EnumMap in ObjectDB? but it works fine for fields like = HashMap<EnumType,Double> Thanks EKK EKK Emmanuel Keskes You can persist any Serializable type if you enable this ability in the configuration. But using this feature

cannot delete objects after crash (see issue 2283)

after the crash we cannot delete specific objects, see screenshots of explorer. Database will be soon available (size 5.561.119 KB) on hummingbird-systems.com, user/pw your db name, main menu option ... monitoring shows that creating of object structures is significantly slower than with the old setting

not possible to add an existing object to an array via explorer

when trying to add an existing object via context menu/add existing object an entering the id the attached message appears (see attachment): objectdb.java.util.ArrayList cannot be cast to java.util.Map hgzwicker Hans-Georg Zwicker Thank you for your report. Build 2.7.1_02 should fix this exception. support Support

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ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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