public boolean isNull() {
public boolean isNull() throws SQLException { if (rs == null) throw new FBDriverConsistencyCheckException( "Result set is null. " + "Please report this bug to driver development team.");  if (rs.row == null) throw new FBDriverConsistencyCheckException( "Current row is null. " + "Please report this bug to driver development team.");
    public boolean isNull() {        return (rs.row[numCol] == null);    }