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https://issues.apache.org/jira/browse/PARQUET-2090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17414737#comment-17414737
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Chao Sun commented on PARQUET-2090:
-----------------------------------
Thanks [~emkornfield], you are right - I missed the comment of file offset for
column chunk and thought it has similar meaning as the one for row group. My
bad. PARQUET-2089 tracks the real issue here which affects Spark.
> [C++] Parquet writes incorrect file_offset
> -------------------------------------------
>
> Key: PARQUET-2090
> URL: https://issues.apache.org/jira/browse/PARQUET-2090
> Project: Parquet
> Issue Type: Bug
> Components: parquet-cpp
> Reporter: Chao Sun
> Assignee: Micah Kornfield
> Priority: Critical
>
> Currently the Parquet writer sets {{file_offset}} in the following way (from
> {{metadata.cc}})
> {code:cpp}
> if (dictionary_page_offset > 0) {
>
> column_chunk_->meta_data.__set_dictionary_page_offset(dictionary_page_offset);
> column_chunk_->__set_file_offset(dictionary_page_offset +
> compressed_size);
> } else {
> column_chunk_->__set_file_offset(data_page_offset + compressed_size);
> }{code}
> This doesn't look correct, as it shouldn't take {{compressed_size}} into
> consideration.
> The {{file_offset}} is used when filtering row groups, and the above could
> cause correctness issue. See SPARK-36696.
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