[jira] [Resolved] (ARROW-11463) Allow configuration of IpcWriterOptions 64Bit from PyArrow

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

     [ https://issues.apache.org/jira/browse/ARROW-11463?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antoine Pitrou resolved ARROW-11463.
------------------------------------
    Fix Version/s: 4.0.0
       Resolution: Fixed

Issue resolved by pull request 9394
[https://github.com/apache/arrow/pull/9394]

> Allow configuration of IpcWriterOptions 64Bit from PyArrow
> ----------------------------------------------------------
>
>                 Key: ARROW-11463
>                 URL: https://issues.apache.org/jira/browse/ARROW-11463
>             Project: Apache Arrow
>          Issue Type: Task
>          Components: Python
>            Reporter: Leonard Lausen
>            Assignee: Tao He
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> For tables with many chunks (2M+ rows, 20k+ chunks), `pyarrow.Table.take` will be around 1000x slower compared to the `pyarrow.Table.take` on the table with combined chunks (1 chunk). Unfortunately, if such table contains large list data type, it's easy for the flattened table to contain more than 2**31 rows and serialization of the table with combined chunks (eg for Plasma store) will fail due to `pyarrow.lib.ArrowCapacityError: Cannot write arrays larger than 2^31 - 1 in length`
> I couldn't find a way to enable 64bit support for the serialization as called from Python (IpcWriteOptions in Python does not expose the CIpcWriteOptions 64 bit setting; further the Python serialization APIs do not allow specification of IpcWriteOptions)
> I was able to serialize successfully after changing the default and rebuilding
> {code:c++}
> modified   cpp/src/arrow/ipc/options.h
> @@ -42,7 +42,7 @@ struct ARROW_EXPORT IpcWriteOptions {
>    /// \brief If true, allow field lengths that don't fit in a signed 32-bit int.
>    ///
>    /// Some implementations may not be able to parse streams created with this option.
> -  bool allow_64bit = false;
> +  bool allow_64bit = true;
>  
>    /// \brief The maximum permitted schema nesting depth.
>    int max_recursion_depth = kMaxNestingDepth;
> {code}



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