@HiveDecimalVersionV1
  public static HiveDecimalV1 create(long l) {
    return new HiveDecimalV1(new BigDecimal(l));
  }
Default precision/scale when system is not able to determine them, such as in case
 of a non-generic udf.
storage-api/src/java/org/apache/hadoop/hive/common/type/HiveDecimalV1.java