What is version property in Hibernate?
If the data is read by two threads at the same time, and both try to update the same row with different values, Hibernate uses the @Version field to check if the row is already updated. Before committing, each transaction verifies that no other transaction has modified its data.
What is Hibernate type?
A Hibernate Type is a strategy for mapping a Java property type to a JDBC type or types.
What are the types of mapping in Hibernate?
These types are called Hibernate mapping types, which can translate from Java to SQL data types and vice versa….Primitive Types.
| Mapping type | Java type | ANSI SQL Type |
|---|---|---|
| integer | int or java.lang.Integer | INTEGER |
| long | long or java.lang.Long | BIGINT |
| short | short or java.lang.Short | SMALLINT |
| float | float or java.lang.Float | FLOAT |
What are the two types of mapping relationship available in hibernate?
We can perform one to one mapping in hibernate by two ways:
- By many-to-one element.
- By one-to-one element.
How Hibernate save data list?
Saving Collections in Hibernate with Example
- In this code snip, User has one address. class UserDetails{ —– private int userId; —– private Address address; —–
- In this code snip User has two addresses. class UserDetails{ —– private int userId; —– private Address address1;
- In this code snip User has more than two addresses.
Which of the following properties is are held by Hibernate configuration file for databases in a standalone situation?
Hibernate Properties
| Sr.No. | Properties & Description |
|---|---|
| 2 | hibernate.connection.driver_class The JDBC driver class. |
| 3 | hibernate.connection.url The JDBC URL to the database instance. |
| 4 | hibernate.connection.username The database username. |
| 5 | hibernate.connection.password The database password. |
What is the default annotation for a property in Hibernate?
The default annotation for a property in the Java framework is a @ld annotation, where Hibernate assumes that the annotation is on the object’s access properties and detects that it is on the field.
What is configuration in Hibernate?
As Hibernate can operate in different environments, it requires a wide range of configuration parameters. These configurations contain the mapping information that provides different functionalities to Java classes. Generally, we provide database related mappings in the configuration file.
What is columnDefinition in hibernate?
columnDefinition definition: The SQL fragment that is used when generating the DDL for the column.
What are hibernate Annotations?
Hibernate annotations are the newest way to define mappings without the use of XML file. You can use annotations in addition to or as a replacement of XML mapping metadata. Hibernate Annotations is the powerful way to provide the metadata for the Object and Relational Table mapping.
How does Hibernate work?
Hibernate takes care of mapping Java classes to database tables using XML files and without writing any line of code. Provides simple APIs for storing and retrieving Java objects directly to and from the database. If there is change in the database or in any table, then you need to change the XML file properties only.