[PR] PARQUET-2428: Make RawPagesReader accpet specificed columns. [parquet-mr]

["zhongyujiang (via GitHub)" <gi...@apache.org>]

zhongyujiang opened a new pull request, #1269:
URL: https://github.com/apache/parquet-mr/pull/1269

   Make RawPagesReader support specified columns as sometimes we only need to print page information from certain columns.
   
   Close [PARQUET-2848](https://issues.apache.org/jira/browse/PARQUET-2428)


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