public static String getQualifiedName(int precision, int scale) {
    StringBuilder sb = new StringBuilder(serdeConstants.DECIMAL_TYPE_NAME);
    sb.append("(");
    sb.append(precision);
    sb.append(",");
    sb.append(scale);
    sb.append(")");
    return sb.toString();
  }
Generate the hashCode for this TypeInfo.
serde/src/java/org/apache/hadoop/hive/serde2/typeinfo/DecimalTypeInfo.java