java.sql.SQLException: ORA-02291: integrity constraint violated - par

java.sql.SQLException: ORA-02291: integrity constraint (BOOKER.FK_ANDON_EVENT_STATUS) violated - parent key not found

 at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)

        at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)

        at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)

        at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:743)

        at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:216)

        at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:955)

        at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1168)

        at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3316)

原因：http://www.dba-oracle.com/t_ora_02291_integrity_constraint_string_string_violated_parent_key_not_found.htm

The Oracle docs note this on the ora-02291 error:
 ORA-02291: integrity constraint (string.string) violated - parent key not found

 
Cause: A foreign key value has no matching primary key value.

 
Action: Delete the foreign key or add a matching primary key.

For an insert statement, this ORA-02291 error is common when you are trying to insert a child without a matching parent, as defined by a foreign key constraint.  In that case, you need to add the parent row to the table and then
re-insert your child table row.

See the dba_constraints view to find the parent table.

To fully understand [primary and foreign key constraints, see the book Easy Oracle Jumpstart, to explain these concepts:

实体完整性错误
你的外键FK_ANDON_EVENT_STATUS中对应的父表的列中没有相关数据就会出这错，应该先插入父表，再插子表

表a有一外键，指向表b，那么b就是a的parent table,外键所指的列就是parent key