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1. Error 500: could not initialize a collection in hibernate mapping    stackoverflow.com

I am a newbie for Hibernate. Hope you guys can help me debug below error which really make me crazy. I got a table called CONTENT_WORKGROUP which will map to another ...

2. Hibernate mapping problem    stackoverflow.com

I'm trying to run simple Hibernate application, but I get this: 

org.hibernate.exception.SQLGrammarException: could not execute query
java.sql.SQLException: ORA-00942: table or view does not exist
My Entity: 
package beans;

import javax.persistence.*;

@Entity
public class Idt {
    ...

3. delete parent and child throwing ORA-02290: check constrain    forum.hibernate.org

I am using hibernate annotation . I have a child table which have a unique constrain of parent Id and code(child table). Following mapping in child //bi-directional many-to-one association @ManyToOne @JoinColumn(name = "PARENT_ID") private ParentDO parentDO ; mapping in parent DO // bi-directional many-to-one association to ChildDO @OneToMany(cascade=CascadeType.REMOVE) @JoinColumn(name = "PARENT_ID") When delete only child with one transaction and then parents ...