[jira] [Assigned] (PARQUET-1798) [C++] Review logic around automatic assignment of field_id's

["Antoine Pitrou (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PARQUET-1798?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antoine Pitrou reassigned PARQUET-1798:
---------------------------------------

    Assignee: Weston Pace

> [C++] Review logic around automatic assignment of field_id's
> ------------------------------------------------------------
>
>                 Key: PARQUET-1798
>                 URL: https://issues.apache.org/jira/browse/PARQUET-1798
>             Project: Parquet
>          Issue Type: Improvement
>          Components: parquet-cpp
>            Reporter: Wes McKinney
>            Assignee: Weston Pace
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: cpp-4.0.0
>
>          Time Spent: 5h 10m
>  Remaining Estimate: 0h
>
> At schema deserialization (from Thrift) time, we are assigning a default field_id to the Schema node based on a depth-first ordering of notes. This means that a round trip (load, then write) will cause field_id's to be written that weren't there before. I'm not sure this is the desired behavior.
> We should examine this in more detail and possible change it. See also discussion in ARROW-7080 https://github.com/apache/arrow/pull/6408



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