ParquetRecordWriter does not provide interface like getRowCount(),getRawDataSize() like org.apache.orc.Writer

Hive with orc can update the statistics like rowCount,rawDataSize after loading data to table. Hive with parquet cannot and need to use analyze command like "analyze table xxx compute statistics noscan" to update these two statistics info. The reason is ParquetRecordWriter used in hive does not provide interfaces like getRowCount(),getRawDataSize(). While org.apache.orc.Writer provides these [two interfaces](https://github.com/apache/orc/blob/master/java/core/src/java/org/apache/orc/Writer.java#L68 ). Anyone knows how to get rowCount and rawDataSize in ParquetRecordWriter?

**Reporter**: [liyunzhang](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=kellyzly)

_{**Note**: *This issue was originally created as [PARQUET-1117](https://issues.apache.org/jira/browse/PARQUET-1117). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Beginne damit, ParquetRecordWriter in diesem Repository zu finden und seine verfügbaren Schnittstellen mit den im Issue verlinkten org.apache.orc.Writer-Referenzen zu vergleichen. Prüfe, wie Hive derzeit rowCount und rawDataSize abruft, und bestätige anschließend, dass die angeforderten Statistiken bereitgestellt werden können, ohne den genannten analyze table-Befehl vorauszusetzen.

Vom Indexierungsmodell aus dem Issue-Text verfasst.