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https://issues.apache.org/jira/browse/PARQUET-2090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Micah Kornfield moved ARROW-13941 to PARQUET-2090:
--------------------------------------------------
Component/s: (was: Parquet)
parquet-cpp
Key: PARQUET-2090 (was: ARROW-13941)
Workflow: patch-available, re-open possible (was: jira)
Project: Parquet (was: Apache Arrow)
> [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
> 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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