org.hibernate.hql.internal.ast.querysyntaxexception entity/table is not mapped
org.hibernate.hql.internal.ast.querysyntaxexception: entity is not mapped - this is a common error I used to get when working with Hibernate queries in...
What is Dialect in Hibernate and List of Dialects
Dialect in Hibernate - Dialect is a class and a bridge between Java JDBC types and SQL types, which contains mapping between...
JPA AttributeConverter Examples
AttributeConverter introduced in JPA 2.1. This article demonstrates JPA AttributeConverter with an example.
What is JPA ...
many-to-many bidirectional association
many-to-many bidirectional mapping :
In a relational database in a many-to-many relationship, a row in table X can have...
Merge – Re attaching detached Entities
Merge the state of the given entity into the current persistence context. The merge method’s major task is to transfer the state from...
ORM (Object Relational Mapping)
1. What is Object Relational Mapping (ORM)?
ORM or Object Relational Mapping is a system that implements the responsibility of...
Hibernate – many-to-many unidirectional association
In a relational database in a many-to-many relationship, a row in table X can have more than one matching row in table...
one-to-many bidirectional association
In a relational database in a one-to-many relationship, a row in table X can have more than one matching row in table...
Hibernate – one-to-many unidirectional association
In a relational database in a one-to-many relationship, a row in table X can have more than one matching row in table...
one-to-one bidirectional association
In a relational database in a one-to-one relationship, a row in table X can have no more than one matching row in...
Hibernate – One-to-One unidirectional association
In a relational database in a one-to-one relationship, a row in table X can have no more than one matching row in...
Key Points to understand Associations in JPA and Hibernate
Entity Role.Cascade.Fetch Type.Direction.mappedBy Attribute.Join Column.Join Tables.Inverse Join Column.
1. Entity Role :
In every association there are...
Save image – working with large objects (@LOB) in JPA with Hibernate
In this article you will see how to save image in database and how to work with LOB (Large objects), CLOB (Character...
@Transient annotation in Jpa or Hibernate – ignore persistent fields
1. What is the use of @Transient annotation in JPA and Hibernate
@Transient annotation...
JPA + Mysql + Maven example setup in eclipse
Project Structure :
Import downloaded project into eclipse. If you are new to maven follow Import existing maven project into...
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