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CallableStatement cstmt = null; try { // The procedure invoked below has a signature of: // procedure get_emps_with_high_sal( p_deptno in number, // p_sal_limit in number default 2000 , // p_emp_details_cursor out sys_refcursor ) Note that while formulating the CallableStatement string, you should give only two parameter placeholders (there should not be a for the parameter with the default value in the statement string): // formulate a CallableStatement string using SQL92 // syntax String oracleStyle = "begin callable_stmt_demo.get_emps_with_high_sal( , ); end;"; // create the CallableStatement object cstmt = conn.prepareCall( oracleStyle ); // bind the input value by name cstmt.setInt("p_deptno", 10 ); // no need to pass the second parameter "p_sal_limit" // which gets a default value of 2000 // register the output value cstmt.registerOutParameter( "p_emp_details_cursor", OracleTypes.CURSOR ); // execute the query cstmt.execute(); rset = (ResultSet) cstmt.getObject( "p_emp_details_cursor" ); // print the result while (rset.next()) { int empNo = rset.getInt ( 1 ); String empName = rset.getString ( 2 ); String empJob = rset.getString ( 3 ); int empSal = rset.getInt ( 4 ); System.out.println( empNo + " " + empName + " " + empJob + " " + empSal ); } } finally { // release JDBC resources in finally clause. JDBCUtil.close( rset ); JDBCUtil.close( cstmt ); } }

The procedure _demoOracleSyntaxProcedureBindByNameUpdate() simply does an update using binding by named parameters: private static void _demoOracleSyntaxProcedureBindByNameUpdate( Connection conn ) throws SQLException { System.out.println( "\nExample 5, Oracle syntax, calling a procedure," + " update example" ); CallableStatement cstmt = null; try { // The procedure invoked below has a signature of: // procedure give_raise( p_deptno in number ) // formulate a CallableStatement string using SQL92 // syntax String oracleStyle = "begin callable_stmt_demo.give_raise( ); end;"; // create the CallableStatement object cstmt = conn.prepareCall( oracleStyle ); // bind the input value by name cstmt.setInt("p_deptno", 10 ); // execute cstmt.execute(); conn.commit(); } catch (SQLException e) { // print a message and roll back. JDBCUtil.printExceptionAndRollback( conn, e ); } finally { // release JDBC resources in finally clause. JDBCUtil.close( cstmt ); } } }

Table 6-2 lists some common error conditions that you may encounter when using CallableStatement and their resolutions.

Exception Message* Possible Cause(s) Action(s)

Double-check your CallableStatement string. For SQL92-style strings, look for missing/ mismatched curly braces, for example. The format of the callable string is incorrect. The format of the CallableStatement string is incorrect format.

java.sql.SQLException: Malformed SQL92 string at position: 51 . . .

ORA-06550: line 1, column 60: of PLS-00103: Encountered the symbol "end-of-file" when expecting one of the following: ; <an identifier> <a double-quoted delimited-identifier> . . . You did not bind all input parameters or register all output parameters. There is a parameter type mismatch.

Missing IN or OUT parameter at index:: 1 java.sql.SQLException: Missing IN or OUT parameter at index:: 1 . . .

Make sure you bind all input parameters and register all output parameters. Make sure that you use the correct setXXX() method for binding input parameters and the correct type while registering output parameters. Make sure you use only ordinal binding or named parameter binding don t mix and match.

ORA-06550: line 1, column 13: PLS-00382: expression is of wrong type You are using both ordinal and named parameter binding for the same statement execution.

. . .operation not allowed: ordinal binding and Named binding cannot be combined! java.sql.SQLException: operation not allowed: Ordinal binding and Named binding cannot be combined! . . . Either the procedure does not exist or the user does not have the execute privilege on it.

Check the invoked procedure name. Make sure the database user has the execute privilege on the procedure.