Method isNull

src/org/apache/pig/data/AppendableSchemaTuple.java:207–215

(int fieldNum)

    }

    @Override
    public boolean isNull(int fieldNum) throws ExecException {
        int diff = fieldNum - schemaSize();
        if (diff >= 0 && diff < appendedFieldsSize()) {
            return isAppendedFieldNull(diff);
        } else {
            return super.isNull(fieldNum);
        }
    }

    @Override
    public byte getType(int fieldNum) throws ExecException {