LESS_THAN_EQUALS doesn't handle the case when min=max

      case PredicateLeaf::Operator::LESS_THAN_EQUALS:
        loc = compareToRange(values.at(0), minValue, maxValue);
        if (loc == Location::AFTER || loc == Location::MAX) {    // 'loc' could be MIN and minValue could equal to maxValue. This case is missed here.
          return hasNull ? TruthValue::YES_NULL : TruthValue::YES;
        } else if (loc == Location::BEFORE) {
          return hasNull ? TruthValue::NO_NULL : TruthValue::NO;
        } else {
          return hasNull ? TruthValue::YES_NO_NULL : TruthValue::YES_NO;
        }