@TableGenerator : how to use <p>i will try to generate the primary keys using table generator. but when i insert the 6 records in my table, the primaryKey table show only one on value. here is the following code</p> <p>My Entity class</p> <pre><code>package com.generatorvaluetest.domain; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.SequenceGenerator; import javax.persistence.TableGenerator; @Entity public class Snufu { private int autoId; private int identityId; private int sequenceId; private int tableId; private String name; public int getAutoId() { return autoId; } public void setAutoId(int autoId) { this.autoId = autoId; } public int getIdentityId() { return identityId; } public void setIdentityId(int identityId) { this.identityId = identityId; } public int getSequenceId() { return sequenceId; } public void setSequenceId(int sequenceId) { this.sequenceId = sequenceId; } @Id @TableGenerator(name="tg" , table="pk_table", pkColumnName="name" , valueColumnName="vlaue" , allocationSize=10) @GeneratedValue(strategy=GenerationType.TABLE , generator="tg") public int getTableId() { return tableId; } public void setTableId(int tableId) { this.tableId = tableId; } public String getName() { return name; } public void setName(String name) { this.name = name; } } </code></pre> <p>This is my main class </p> <pre><code> package com.generatorvaluetest.main; import org.hibernate.HibernateException; import org.hibernate.Session; import com.generatorvaluetest.domain.Snufu; import com.generatorvaluetest.util.HibernateUtil; public class GeneratorValueTest { public static void main(String[] args) throws HibernateException{ HibernateUtil.recreateDatabase(); Session session = HibernateUtil.beginTransaction(); for(int i = 0 ; i&lt; 5 ; i++){ Snufu snufu = new Snufu(); snufu.setName("jimmy"+i); session.saveOrUpdate(snufu); } new Thread(new Runnable() { @Override public void run() { Session session = HibernateUtil.beginTransaction(); Snufu snufu = new Snufu(); snufu.setName("jimmykalra"); session.saveOrUpdate(snufu); HibernateUtil.commitTransaction(); } }).start(); HibernateUtil.commitTransaction(); } } </code></pre> <p>in database when i select the values from pk_table the values are</p> <pre><code>|name | value| |snuf | 1 | </code></pre> <p>but in snufu tables there are 6 records </p>