[jira] [Resolved] (PARQUET-2090) [C++] Parquet writes incorrect file_offset

["Micah Kornfield (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PARQUET-2090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Micah Kornfield resolved PARQUET-2090.
--------------------------------------
    Resolution: Invalid

> [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.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)