[jira] [Commented] (ARROW-1924) [Python] Bring back pickle=True option for serialization

["Rok Mihevc (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-1924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17658955#comment-17658955 ] 

Rok Mihevc commented on ARROW-1924:
-----------------------------------

This issue has been migrated to [issue #17915|https://github.com/apache/arrow/issues/17915] on GitHub. Please see the [migration documentation|https://github.com/apache/arrow/issues/14542] for further details.

> [Python] Bring back pickle=True option for serialization
> --------------------------------------------------------
>
>                 Key: ARROW-1924
>                 URL: https://issues.apache.org/jira/browse/ARROW-1924
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>            Reporter: Philipp Moritz
>            Assignee: Philipp Moritz
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 0.9.0
>
>
> We need to revert https://issues.apache.org/jira/browse/ARROW-1758
> The reason is that the semantics for pickle=True is slightly different from just using (cloud-)pickle as the custom serializer:
> If pickle=True is used, the object can be deserialized in any process, even if a deserializer for that type_id has not been registered in that process. On the other hand, if (cloud-)pickle is used as a custom serializer, the object can only be deserialized if pyarrow has the type_id registered and can call the deserializer.



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