[
https://issues.apache.org/jira/browse/ARROW-8657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Wes McKinney resolved ARROW-8657.
---------------------------------
Resolution: Fixed
Issue resolved by pull request 7089
[https://github.com/apache/arrow/pull/7089]
> [Python][C++][Parquet] Forward compatibility issue from 0.16 to 0.17 when
> using version='2.0'
> ---------------------------------------------------------------------------------------------
>
> Key: ARROW-8657
> URL: https://issues.apache.org/jira/browse/ARROW-8657
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++, Python
> Affects Versions: 0.17.0
> Reporter: Pierre Belzile
> Assignee: Micah Kornfield
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.17.1, 1.0.0
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> With the recent release of 0.17, the ParquetVersion is used to define the
> logical type interpretation of fields and the selection of the DataPage
> format.
> As a result all parquet files that were created with ParquetVersion::V2 to
> get features such as unsigned int32s, timestamps with nanosecond resolution,
> etc are not forward compatible (cannot be read with 0.16.0). That's TBs of
> data in my case.
> Those two concerns should be separated. Given that that DataPageV2 pages were
> not written prior to 0.17 and in order to allow reading existing files, the
> existing version property should continue to operate as in 0.16 and inform
> the logical type mapping.
> Some consideration should be given to issue a release 0.17.1.
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
