Insert in Oracle data from Java loop

Question

I tried to execute this code in order to generate random data in Oracle table:

DriverManager.registerDriver(new oracle.jdbc.OracleDriver());

        // Connect to the database
        Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe", "admin", "qwerty");

        PreparedStatement pstmt
            = conn.prepareStatement("BEGIN "
                + "FOR loop_counter IN 1..10 "
                + "LOOP "
                + "INSERT INTO EVENTS (EVENTID, SOURCE, TYPE, EVENT_DATE, DESCRIPTION) "
                + "VALUES (loop_counter, loop_counter, 'warning', "
                + "TO_DATE(TRUNC(DBMS_RANDOM.VALUE(TO_CHAR(DATE '2000-01-01','J') ,TO_CHAR(DATE '9999-12-31','J'))),'J'), "
                + "DBMS_RANDOM.string('x',15)); "
                + "END LOOP; "
                + "COMMIT; "
                + "END; ");

        pstmt.execute();
        pstmt.close();
        conn.close();

This code is successfully executed in PL/SQL deloper but for some reason it hangs in JUnit test execution. Do you have any idea why?

Answer 1

It would be simpler if you did your looping in Java and performed a batch insert. This existing answer should help you:

Efficient way to do batch INSERTS with JDBC