ORA-00900: invalid SQL statement while exporting an Oracle database from Java

Question

Executing below command from the command line is successful, but executing the same command from a Java class throws an "invalid SQL statement"-error.

EXPDP DCR/DCR2017 DIRECTORY=D33 DUMPFILE=DCR.DMP SCHEMAS=DCR  

Java Code:

  String sql ="EXPDP DCR/DCR2017 DIRECTORY=D33 DUMPFILE=DCR.DMP SCHEMAS=DCR";
  Class.forName("oracle.jdbc.driver.OracleDriver");  

  Connection connection = DriverManager.getConnection("jdbc:oracle:thin:@//localhost:1521/orcl","DCR","DCR2017");
  PreparedStatement prepareStatement = connection.prepareStatement(sql);
  boolean execute = prepareStatement.execute();
  System.out.println(execute);

Answer 1

You cannot call expdp from SQL. It's a command-line function. There is a PL/SQL API for that called dbms_datapump , which you can call from PL/SQL.