Question

I am wondering what the input parameters are referencing in the setNull and setInt methods in the following snippet. What is the parameter index. What is the SQL type and how do I determine that from the database columns/data??

public void testQUERY_UPDATEPORTFOLIO() throws Exception{

    UnitTestHelper helper = new UnitTestHelper();
    Connection con = helper.getConnection(helper.sourceDBUrl);
    Connection conTarget = helper.getConnection(helper.targetDBUrl);

    PreparedStatement stmt = con.prepareStatement(TRScheduleStatusCalculator.QUERY_UPDATEPORTFOLIO);
    stmt.setNull(1,Types.INTEGER);
    stmt.setInt(2,2290);
    ResultSet sourceVal = stmt.executeQuery();

    stmt = conTarget.prepareStatement(TRScheduleStatusCalculator.QUERY_UPDATEPORTFOLIO);
    stmt.setNull(1,Types.INTEGER);
    stmt.setInt(2,2290);
    ResultSet targetVal = stmt.executeQuery();


    assertTrue(helper.resultSetsEqual(sourceVal,targetVal));

}

Answer 1

PreparedStatement.setnull(paraIndex, SQLType) sets the SQL varchar type to Null for the specified placeholder.
stmt.setInt(2,2290); sets an int value 2290 at 2nd placeholder .