[C++][Python] Remove deprecated functions in 20.0 #45680

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1. pitrou

   added

   Type: enhancement

   on Mar 5, 2025
2. pitrou

   added this to the 20.0.0 milestone on Mar 5, 2025
3. pitrou commented on Mar 5, 2025

   

   pitrou

   on Mar 5, 2025

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   cc @AlenkaF
4. github-actions

   added

   Component: C++

   Component: Python

   on Mar 5, 2025
5. AlenkaF

   self-assigned this

   on Mar 10, 2025
6. AlenkaF commented on Mar 11, 2025

   

   AlenkaF

   on Mar 11, 2025

   Last edited by AlenkaF

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   I have checked the C++ and Python parts of the codebase an found these deprecated APIs. I will start with the Python part. Would be great, in the meantime, to get some feedback on the C++ and Flight part in case I am off somewhere or I should split the work in multiple PRs for easier review.

   C++

   • GetNextSegment and related in grouper.cc from GH-44052 (Deprecated in 18.0.0)
   • GetCapacity in Gandiva cache.cc from GH-41329(Deprecated in 17.0.0)
   • BufferReader constructors in io/memory.h from GH-37212 (Deprecated in 14.0.0)
   • ObjectType, FileStatistics in io/hdfs.h from ARROW-8224 (Deprecated in 0.17.0)
   • OpenAppendStream in filesystem/gcsfs.h from ARROW-14222 (Deprecated in 6.0.0)
   • Leftover from ARROW-15732 (Deprecated in 11.0.0)
     • owned_thread_pool_

   C++ Deprecated in 19.0.0, need to wait

   • GetRecordBatchReader in reader.h from GH-44808
   • NewRowGroup with chunk_size parquet/arrow/writer.h from GH-45048

   Python C++

   • PARQUET_2_0 see [Python][C++] Fix deprecations when building pyarrow #45129 (comment)
   • serialize/deserialize [Python] Remove no longer used serialize/deserialize PyArrow C++ code #43587
     • see GH-44063: [Python] Deprecate the no longer used serialize/deserialize Pyarrow C++ functions #44064

   Python

   • Python use_legacy_format in ipc writer

     arrow/python/pyarrow/ipc.py

     Lines 62 to 64 in c124bb5

     	use_legacy_format : bool, default None
     	Deprecated in favor of setting options. Cannot be provided with
     	options.

   • Python use_legacy_dataset in ParquetDataset
     • Opened issue: [Python] Remove use_legacy_dataset from code base #44790
     • test
   • PyExtensionType from [Python] Disable PyExtensionType autoload #38607
     • test

   Flight connected

   • Authenticate (Deprecated in 13.0.0)
   • Flight UCX (Deprecated in 19.0.0)
   • StartCall (Deprecated in 13.0.0)
7. AlenkaF

   added sub-issues on Mar 11, 2025

   • [Python] Remove no longer used serialize/deserialize PyArrow C++ code #43587
   • [Python] Remove use_legacy_dataset from code base #44790
8. pitrou commented on Mar 11, 2025

   

   pitrou

   on Mar 11, 2025

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   cc @zanmato1984 for GetNextSegment. Other C++ removals look fine to me.

   👍React with 👍1Reacted by Alenka Frim
9. pitrou commented on Mar 11, 2025

   

   pitrou

   on Mar 11, 2025

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   cc @lidavidm @zeroshade for Flight deprecations.
10. zanmato1984 commented on Mar 11, 2025

    

    zanmato1984

    on Mar 11, 2025

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    The removal of GetNextSegment looks good to me. Thank you @AlenkaF for bringing this up!

    👍React with 👍1Reacted by Alenka Frim
11. lidavidm commented on Mar 11, 2025

    

    lidavidm

    on Mar 11, 2025

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    Those removals look good to me, thanks.

    👍React with 👍1Reacted by Alenka Frim
12. AlenkaF

    added sub-issues on Mar 25, 2025

    • [C++] Remove deprecated GetNextSegment #45744
    • [C++] Remove deprecated functions in 20.0 (C++ subset) #45746
    • [C++] Remove deprecated ObjectType and FileStatistics #45747
    • [C++][Python][R] Remove deprecated PARQUET_2_0 #45848
    • [C++][Flight] Remove deprecated Authenticate and StartCall #45922
13. AlenkaF

    removed sub-issues on Mar 28, 2025

    • [C++] Remove deprecated functions in 20.0 (C++ subset) #45746
    • [C++] Remove deprecated ObjectType and FileStatistics #45747
14. AlenkaF commented on Mar 28, 2025

    

    AlenkaF

    on Mar 28, 2025

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    I will be moving some of the deprecations still left to a new issue: #45968 so we can close this one for the 20.0.0 release.
15. AlenkaF

    closed this as completedon Apr 1, 2025
16. AlenkaF

    added a sub-issue on Apr 1, 2025

    • [C++] Remove deprecated functions in 20.0 (C++ subset) #45746