Github user paul-rogers commented on a diff in the pull request:

    https://github.com/apache/drill/pull/846#discussion_r119223453
  
    --- Diff: 
exec/java-exec/src/main/java/org/apache/parquet/hadoop/ParquetColumnChunkPageWriteStore.java
 ---
    @@ -0,0 +1,269 @@
    +/*
    --- End diff --
    
    Compared this file to the Parquet original (thanks for providing the file 
name) using [this tool](https://www.diffchecker.com/diff), referencing the 
diagram [here](https://parquet.apache.org/documentation/latest/). The changes 
made in the Drill copy seem reasonable.
    
    I do have questions, however, about the approach to writing. (See below.) 
Seems overly memory intensive. But, this is an issue with the Parquet original, 
not about this "port" of the file.


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