jpa mysql table does not exists

Question

I am trying to insert a Employee entity into the database. I am using JPA and the database is mysql. When I try to insert the entity, it gives me test.employee does not exist. I assume that I dont have to create the table. Entity will automatically create the table with the annotated name. Please find the exception and code below.

Exception in thread "main" javax.persistence.RollbackException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'test.employee' doesn't exist
Error Code: 1146
Call: INSERT INTO employee (FIRST_NAME, LAST_NAME) VALUES (?, ?)
    bind => [abc,def]
Query: InsertObjectQuery(com.example.entities.Employee@ee1ede)
    at org.eclipse.persistence.internal.jpa.transaction.EntityTransactionImpl.commit(EntityTransactionImpl.java:157)
    at com.example.dao.BaseDao.commitAndClose(BaseDao.java:41)
    at com.example..dao.BaseDao.persist(BaseDao.java:29)
    at com.example..dao.EmployeeDao.createEmployee(EmployeeDao.java:29)
    at com.example.Main.main(KITMain.java:27)
Caused by: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'test.employee' doesn't exist
Error Code: 1146
Call: INSERT INTO employee (FIRST_NAME, LAST_NAME) VALUES (?, ?)
    bind => [ram, mohan]
Query: InsertObjectQuerycom.example.entities.Employee@ee1ede)
    at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:331)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:900)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeNoSelect(DatabaseAccessor.java:962)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:631)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:558)
    at org.eclipse.persistence.internal.sessions.AbstractSession.basicExecuteCall(AbstractSession.java:1991)
    at org.eclipse.persistence.sessions.server.ClientSession.executeCall(ClientSession.java:298)
    at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:242)
    at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:228)
    at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.insertObject(DatasourceCallQueryMechanism.java:377)
    at org.eclipse.persistence.internal.queries.StatementQueryMechanism.insertObject(StatementQueryMechanism.java:165)
    at org.eclipse.persistence.internal.queries.StatementQueryMechanism.insertObject(StatementQueryMechanism.java:180)
    at org.eclipse.persistence.internal.queries.DatabaseQueryMechanism.insertObjectForWrite(DatabaseQueryMechanism.java:489)
    at org.eclipse.persistence.queries.InsertObjectQuery.executeCommit(InsertObjectQuery.java:80)
    at org.eclipse.persistence.queries.InsertObjectQuery.executeCommitWithChangeSet(InsertObjectQuery.java:90)
    at org.eclipse.persistence.internal.queries.DatabaseQueryMechanism.executeWriteWithChangeSet(DatabaseQueryMechanism.java:301)
    at org.eclipse.persistence.queries.WriteObjectQuery.executeDatabaseQuery(WriteObjectQuery.java:58)
    at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:899)
    at org.eclipse.persistence.queries.DatabaseQuery.executeInUnitOfWork(DatabaseQuery.java:798)
    at org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWorkObjectLevelModifyQuery(ObjectLevelModifyQuery.java:108)
    at org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWork(ObjectLevelModifyQuery.java:85)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2896)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1793)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1775)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1726)
    at org.eclipse.persistence.internal.sessions.CommitManager.commitNewObjectsForClassWithChangeSet(CommitManager.java:226)
    at org.eclipse.persistence.internal.sessions.CommitManager.commitAllObjectsWithChangeSet(CommitManager.java:125)
    at org.eclipse.persistence.internal.sessions.AbstractSession.writeAllObjectsWithChangeSet(AbstractSession.java:4196)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabase(UnitOfWorkImpl.java:1441)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabaseWithChangeSet(UnitOfWorkImpl.java:1531)
    at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.commitRootUnitOfWork(RepeatableWriteUnitOfWork.java:277)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitAndResume(UnitOfWorkImpl.java:1169)
    at org.eclipse.persistence.internal.jpa.transaction.EntityTransactionImpl.commit(EntityTransactionImpl.java:132)
    ... 4 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'test.employee' doesn't exist
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
    at com.mysql.jdbc.Util.getInstance(Util.java:384)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4232)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4164)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2615)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2776)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2838)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2082)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2334)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2262)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2246)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:890)

persistence.xml

http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

    <class>com.example.entities.Employee</class>
    <properties>

        <!-- derby -->

        <!-- <property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver" 
            /> <property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver" 
            /> <property name="javax.persistence.jdbc.url" value="jdbc:derby://localhost:1527/test" 
            /> <property name="javax.persistence.jdbc.user" value="app" /> <property 
            name="javax.persistence.jdbc.password" value="admin" /> -->


        <!-- mysql -->

        <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
        <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/test" />
        <property name="javax.persistence.jdbc.user" value="root" />
        <property name="javax.persistence.jdbc.password" value="" />

        <!-- EclipseLink should create the database schema automatically -->
        <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
        <property name="eclipselink.ddl-generation.output-mode"
            value="database" />

        <!-- Configure simple SQL logging for demonstration. -->
        <property name="eclipselink.logging.level" value="FINE" />
        <property name="eclipselink.logging.thread" value="false" />
        <property name="eclipselink.logging.session" value="false" />
        <property name="eclipselink.logging.exceptions" value="false" />
        <property name="eclipselink.logging.timestamp" value="false" />


    </properties>
</persistence-unit>

package com.example.entities;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

/**
 * 
 * @author ddd
 */
@Entity
@Table(name = "employee")
public class Employee implements Serializable {



    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "EMP_ID")
    private String employeeId;

    @Column(name = "FIRST_NAME")
    private String firstName;

    @Column(name = "LAST_NAME")
    private String lastName ;

    public String getEmployeeId() {
        return employeeId;
    }

    public void setEmployeeId(String employeeId) {
        this.employeeId = employeeId;
    }

    public String getFirstName() {
        return firstName;
    }
    public String getLastName() {
        return lastName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

}







[EL Config]: metadata: The access type for the persistent class [class de.allianz.kit.server.persistence.entities.Employee] is set to [FIELD].
[EL Config]: metadata: The alias name for the entity class [class de.allianz.kit.server.persistence.entities.Employee] is being defaulted to: Employee.
[EL Info]: EclipseLink, version: Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5
[EL Fine]: connection: Detected database platform: org.eclipse.persistence.platform.database.MySQLPlatform
[EL Config]: connection: Connection(3278348)--connecting(DatabaseLogin(
    platform=>MySQLPlatform
    user name=> "root"
    datasource URL=> "jdbc:mysql://localhost:3306/test"
))
[EL Config]: connection: Connection(5863106)--Connected: jdbc:mysql://localhost:3306/test
    User: root@localhost
    Database: MySQL  Version: 5.6.17
    Driver: MySQL Connector Java  Version: mysql-connector-java-5.1.30 ( Revision: alexander.soklakov@oracle.com-20140310090514-8xt1yoht5ksg2e7c )
[EL Info]: connection: file:/C:/myworkspace/kit_ws/com.example.server.persistence/classes/_kit login successful
[EL Fine]: sql: Connection(5863106)--DROP TABLE employee
[EL Fine]: sql: SELECT 1
[EL Warning]: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown table 'test.employee'
Error Code: 1051
Call: DROP TABLE employee
Query: DataModifyQuery(sql="DROP TABLE employee")
[EL Fine]: sql: Connection(5863106)--DROP TABLE employee
[EL Fine]: sql: SELECT 1
[EL Warning]: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown table 'test.employee'
Error Code: 1051
Call: DROP TABLE employee
Query: DataModifyQuery(sql="DROP TABLE employee")
[EL Fine]: sql: Connection(5863106)--DROP TABLE employee
[EL Fine]: sql: SELECT 1
[EL Warning]: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown table 'test.employee'
Error Code: 1051
Call: DROP TABLE employee
Query: DataModifyQuery(sql="DROP TABLE employee")
[EL Fine]: sql: Connection(5863106)--DROP TABLE employee
[EL Fine]: sql: SELECT 1
[EL Warning]: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown table 'test.employee'
Error Code: 1051
Call: DROP TABLE employee
Query: DataModifyQuery(sql="DROP TABLE employee")
[EL Fine]: sql: Connection(5863106)--DROP TABLE employee
[EL Fine]: sql: SELECT 1
[EL Warning]: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown table 'test.employee'
Error Code: 1051
Call: DROP TABLE employee
Query: DataModifyQuery(sql="DROP TABLE employee")
[EL Fine]: sql: Connection(5863106)--CREATE TABLE employee (EMP_ID VARCHAR(255) AUTO_INCREMENT NOT NULL, FIRST_NAME VARCHAR(255), LAST_NAME VARCHAR(255), PRIMARY KEY (EMP_ID))
[EL Fine]: sql: SELECT 1
[EL Warning]: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Incorrect column specifier for column 'EMP_ID'
Error Code: 1063
Call: CREATE TABLE employee (EMP_ID VARCHAR(255) AUTO_INCREMENT NOT NULL, FIRST_NAME VARCHAR(255), LAST_NAME VARCHAR(255), PRIMARY KEY (EMP_ID))
Query: DataModifyQuery(sql="CREATE TABLE employee (EMP_ID VARCHAR(255) AUTO_INCREMENT NOT NULL, FIRST_NAME VARCHAR(255), LAST_NAME VARCHAR(255), PRIMARY KEY (EMP_ID))")
[EL Fine]: sql: Connection(5863106)--INSERT INTO employee (FIRST_NAME, LAST_NAME) VALUES (?, ?)
    bind => [ram, mohan]
[EL Fine]: sql: SELECT 1
[EL Warning]: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'test.employee' doesn't exist
Error Code: 1146

Answer 1

You will need extra configuration if you want an auto generated varchar.

The generation of DDL is translating to:

CREATE TABLE employee (EMP_ID VARCHAR(255) AUTO_INCREMENT NOT NULL, FIRST_NAME VARCHAR(255), LAST_NAME VARCHAR(255), PRIMARY KEY (EMP_ID))

and the log is saying:

Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Incorrect column specifier for column 'EMP_ID'
Error Code: 1063

MySql is rejecting EMP_ID becuase it cant have AUTO_INCREMENT with varchar, and you need to specify the auto generation for it. Probably Derby has this feature, and it works different for MySql.

You might wanna look in this answer.

Or just change the type of EMP_ID to an integer number if you dont mind the type or for a quick test.

Answer 2

Could be you mysql data is corrupted.

Go to Mysql home directory and delete all .frm extension. and restart Msysql server.

Solved.