About null

api-jpa

javax.persistence.criteria.AbstractQuery

The AbstractQuery interface defines functionality that is common to both top-level queries and subqueries.(Interface of JPA)

 
release

2.4.4

... clearing). Fixed the Explorer to show null values in primitive fields (unset values in new fields) correctly. ... Changed non loaded collections on detachment to null (rather than empty collections ). Fixed a critical bug ...

 
forum_thread

Handling deleted references

Hi support team, I have a problem when using DELETE query to delete Entity instances. We use the following hierarchy: ... } Whenever the profile of a user is set to null we create a new (default) one to achieve that each user has a profile. To ... hoping that this would lead to the field "profile" set to "null" but instead I get an object which has the same ID, all default initial ...

 
release

2.4.0

... Changed non loaded collections on detachment to null (rather than empty collections ). Fixed a critical bug ... a replicated slave server. Fixed NOT NULL handling for basic (non relationship) references. Fixed a ...

 
forum_thread

Some details about db behavior

Suppose I have two entities... A B -> A B has a ManyToOne relationship with A. When my database is empty and I persist a valid B entity (that contains actual A reference) I observe some behaviour that I'm not sure I understand. ... type is represented in json like manner i see {something, null, null, and allways nulls}, but when i retrieve that field i see that other ...

 
api-jpa

javax.persistence.criteria.CriteriaQuery

The CriteriaQuery interface defines functionality that is specific to top-level queries.(Interface of JPA)

 
forum_thread

Broken @ManyToOne reference

Hi, I have objects of type A belonging to objects of type B, defined as follows: @MappedSuperclass public abstract class A {   @Id   @ManyToOne(fetch = FetchType.EAGER, cascade=CascadeType.ALL, optional=false)   private B b;   @Id   @Column(length = 36)   private String stringId; } @MappedSuperclass public abstract class B {   @Id   private String name; } ... the 'b' variable in all A objects is always null. Regards, Vladimir PS: the same configuration ... the Child instance is retrieved. Now it has null in the prn field . The output shall look like: Parent ...

 
release

2.5.0

... Fixed Doctor's index rebuilding to use NULL values for missing values of new fields. Fixed a bug in ... clearing). Fixed the Explorer to show null values in primitive fields (unset values in new fields) correctly. ...

 
api-jdo

javax.jdo.JDOHelper

This class can be used by a JDO-aware application to call the JDO behavior of PersistenceCapable instances without declaring them to be PersistenceCapable.(Class of JDO)

 
issue

[ObjectDB 2.6.9] Unexpected exception (Error 990)

[2017-03-29 14:04:44 #1 client] [ObjectDB 2.6.9] Unexpected exception (Error 990)   Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_121 (on Windows 8.1 6.3). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o.InternalException: null com.objectdb.o.InternalException at com.objectdb.o.BYR.o(BYR.java:113) at com.objectdb.o.BYR.w(BYR.java:206) at com.objectdb.o.VUT.j(VUT.java:350) at com.objectdb.o.RST.C(RST.java:194) at com.objectdb.o.RTT.l(RTT.java:134)... com.objectdb.o.InternalException: null com.objectdb.o.InternalException at ... null com.objectdb.o.InternalException at com.objectdb.o.BYR.o(BYR.java:113) at ... Page #36099460 unexpected exception: null [2] Page #36099460 last key is null, parent page #43650945 next key is ...