public static CacheTag cacheTagOfParquetFile(Path path, Configuration cacheConf, JobConf jobConf) {
    MapWork mapWork = LlapHiveUtils.findMapWork(jobConf);
    if (!HiveConf.getBoolVar(cacheConf, ConfVars.LLAP_TRACK_CACHE_USAGE) || mapWork == null) {
      return null;
    }
    PartitionDesc partitionDesc = LlapHiveUtils.partitionDescForPath(path, mapWork.getPathToPartitionInfo());
    return LlapHiveUtils.getDbAndTableNameForMetrics(path, true, partitionDesc);
  }
The total number of rows this RecordReader will eventually read. The sum of the
rows of all the row groups.
ql/src/java/org/apache/hadoop/hive/ql/io/parquet/vector/VectorizedParquetRecordReader.java