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Posted to dev@parquet.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2018/11/26 19:22:00 UTC

[jira] [Updated] (PARQUET-1464) Not able to do backwards compatible projection

     [ https://issues.apache.org/jira/browse/PARQUET-1464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated PARQUET-1464:
------------------------------------
    Labels: pull-request-available  (was: )

> Not able to do backwards compatible projection
> ----------------------------------------------
>
>                 Key: PARQUET-1464
>                 URL: https://issues.apache.org/jira/browse/PARQUET-1464
>             Project: Parquet
>          Issue Type: Bug
>          Components: parquet-mr
>            Reporter: Mouli Mukherjee
>            Priority: Major
>              Labels: pull-request-available
>
> Currently the following scenarios fail while using projections. This makes it hard to do backwards compatible schema changes like adding an optional field or making a required field optional.
> 1. Adding an optional field to an existing thrift schema and making it part of the projection for reading data written using older thrift.
> 2. Projecting a required field using optional.



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