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.*}

首先在此仓库中定位 ParquetRecordWriter，并将其可用接口与 issue 中链接的 org.apache.orc.Writer 引用进行比较。检查 Hive 当前如何获取 rowCount 和 rawDataSize，然后确认无需执行所述的 analyze table 命令即可提供所请求的统计信息。

由索引模型根据 Issue 内容生成。