Can't get JDeveloper/OC4J to auto-create MySQL table

Question

My EJB 3.0 based application is failing to create the MySQL table specified by the @TableGenerator annotation.
Following are the details of my setup and application:
System Setup:
- JDeveloper 10.1.3.1.0
- JDK 1.5.0_07
- Ubuntu Linux kernel 2.6.15-27-k7
- MySQL 5.0
- MySQL ConnectorJ 3.1.13
- Using the embedded OC4J server.
I have done the following so far:
1. Created a database in MySQL called, "test". Did not create any tables.
2. Created a JDeveloper library whose classpath contains the MySQL ConnectorJ JAR file, and tested a database connection from JDeveloper successfully.
3. Added the MySQL/JDeveloper library to my ejb project, "Test1/Model", and selected the database connection from the project properties EJB panel. The database connector is called, "SmashDB". Selecting the database connector on the EJB panel resulted in JDeveloper setting "SmashDBDS" as the default datasource.
A JSF managed bean calls an EJB Session Bean, CustomerFacadeBean.persistEntity(Customer customer) with a Customer object as a parameter to save in the database. OC4J successfully connects to the MySQL "test" database, but fails when trying to access the ID_GENERATOR table, which is specified in an @TableGenerator annotation. The class-level annotations in the Customer entity are as follows:
@Entity
@NamedQuery(name = "Customer.findAll", query = "select o from Customer o")
@TableGenerator(name = "BasicIDGen", table = "ID_GENERATOR", pkColumnName = "GEN_KEY",
pkColumnValue = "CUSTOMER_ID", valueColumnName = "GEN_VALUE")
public class Customer implements Serializable {
private Long id;
private Integer version;
private String firstName;
private String lastName;
private String emailAddr;
My persistence.xml file contains:
<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
version="1.0" xmlns="http://java.sun.com/xml/ns/persistence">
<persistence-unit name="Model">
<properties>
<property name="toplink.ddl-generation" value="drop-and-create-tables"/>
</properties>
</persistence-unit>
</persistence>
With the above definition for Customer and persistence.xml, I expected the ID_GENERATOR and CUSTOMER tables to be created automatically, but this doesn't seem to be happening.
Instead, I get the following error message and stack trace:
2006-09-27 12:25:29.564 ERROR J2EE EJB-08006 [CustomerFacade:public java.lang.Object facade.CustomerFacadeBean.persistEntity(java.lang.Object)] exception occurred during method invocation: oracle.oc4j.rmi.OracleRemoteException: Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2006.7 (Build 060720)): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Table 'test.ID_GENERATOR' doesn't existError Code: 1146
Call:UPDATE ID_GENERATOR SET GEN_VALUE = GEN_VALUE + ? WHERE GEN_KEY = ?
     bind => [50, CUSTOMER_ID]
Query:DataModifyQuery(); nested exception is:
     Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2006.7 (Build 060720)): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Table 'test.ID_GENERATOR' doesn't existError Code: 1146
Call:UPDATE ID_GENERATOR SET GEN_VALUE = GEN_VALUE + ? WHERE GEN_KEY = ?
     bind => [50, CUSTOMER_ID]
etc.....
Help would be greatly appreciated. I've gotten to this point, which appears to be one error away from success (I hope) but don't have a clue what this problem is caused by.
Thanks,
Rick Horowitz

Answer 1

darby wrote:
I can't get this to compile. help!
You can not issue DDL in PL/SQL. You need to use dynamic SQL for that:
create or replace
PROCEDURE CREATE_STAGING_TABLES as
BEGIN
  -- I CAN'T GET THIS TO WORK BUT I CAN COPY THESE LINES AND RUN THEM AND THEY WORK! WHATUP?
  DBMS_OUTPUT.PUT_LINE('Begin Create Import Tables');
  EXECUTE IMMEDIATE 'Create table FAC_STAGING_PROJECTS As select * from FAC_PROJECTS where 1=2';
    EXECUTE IMMEDIATE 'alter table FAC_STAGING_PROJECTS add(ERROR_DESCRIPTION VARCHAR2(4000 CHAR))';
    EXECUTE IMMEDIATE 'alter table FAC_STAGING_PROJECTS add(bImported NUMBER)';
    EXECUTE IMMEDIATE 'alter table FAC_STAGING_PROJECTS add(dteImported DATE)';
  EXECUTE IMMEDIATE 'Create table FAC_STAGING_PURCHASE_ORDERS As select * from FAC_PURCHASE_ORDERS where 1=2';
    EXECUTE IMMEDIATE 'alter table FAC_STAGING_PURCHASE_ORDERS add(ERROR_DESCRIPTION VARCHAR2(4000 CHAR))';
    EXECUTE IMMEDIATE 'alter table FAC_STAGING_PURCHASE_ORDERS add(bImported NUMBER)';
    EXECUTE IMMEDIATE 'alter table FAC_STAGING_PURCHASE_ORDERS add(dteImported DATE)';
  DBMS_OUTPUT.PUT_LINE('End Create Import Tables'); 
  EXCEPTION
   WHEN OTHERS THEN
     raise_application_error(-20022,substr(SQLERRM,1,255));
END CREATE_STAGING_TABLES;SY.
P.S. I am not questioning why do you need to create tables from a stored procedure.