import org.drools.compiler.Person;
rule R1
  when
    $p : Person( name < "90201304122000000000000017" )
  then
end

ksession.insert( new Person( "90201304122000000000000015", 38 ) );

public strictfp class MathProcessor {

...

  private static Object _doOperations(int type1, Object val1, int operation, int type2, Object val2) {
    if (operation < 20) {
      if (((type1 > 49 || operation == EQUAL || operation == NEQUAL) && type1 == type2) ||
              (isIntegerType(type1) && isIntegerType(type2) && operation >= BW_AND && operation <= BW_NOT)) {
        return doOperationsSameType(type1, val1, operation, val2);
      }
      else if ((type1 > 99 && (type2 > 99))
          || (operation != 0 && isNumber(val1) && isNumber(val2))) {
        return doPrimWrapperArithmetic(getNumber(val1, type1),
            operation,
            getNumber(val2, type2), true, box(type2) > box(type1) ? box(type2) : box(type1));
      }
...

  private static Double getNumber(Object in, int type) {
    if (in == null)
      return 0d;
    switch (type) {
...
      case DataTypes.STRING:
        return Double.parseDouble((String) in);
...