public static HiveVarchar getRandHiveVarchar(Random r, VarcharTypeInfo varcharTypeInfo) {
    return getRandHiveVarchar(r, varcharTypeInfo, "abcdefghijklmnopqrstuvwxyz");
  }
Generate object inspector and random row object[].
serde/src/test/org/apache/hadoop/hive/serde2/SerdeRandomRowSource.java