[jira] [Assigned] (ARROW-6506) [C++] Validation of ExtensionType with nested type fails

["Joris Van den Bossche (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-6506?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joris Van den Bossche reassigned ARROW-6506:
--------------------------------------------

    Assignee: Joris Van den Bossche

> [C++] Validation of ExtensionType with nested type fails
> --------------------------------------------------------
>
>                 Key: ARROW-6506
>                 URL: https://issues.apache.org/jira/browse/ARROW-6506
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>            Reporter: Joris Van den Bossche
>            Assignee: Joris Van den Bossche
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 0.15.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> A reproducer using the Python ExtensionType:
> {code}
> class MyStructType(pa.ExtensionType): 
>     def __init__(self): 
>         storage_type = pa.struct([('a', pa.int64()), ('b', pa.int64())]) 
>         pa.ExtensionType.__init__(self, storage_type, 'my_struct_type') 
>     def __arrow_ext_serialize__(self): 
>         return b'' 
>     @classmethod 
>     def __arrow_ext_deserialize__(self, storage_type, serialized): 
>         return MyStructType() 
> ty = MyStructType()
> storage_array = pa.array([{'a': 1, 'b': 2}], ty.storage_type) 
> arr = pa.ExtensionArray.from_storage(ty, storage_array) 
> {code}
> then validating this array fails because it expects no children (the extension array itself has no children, only the storage array):
> {code}
> In [8]: arr.validate()   
> ---------------------------------------------------------------------------
> ArrowInvalid                              Traceback (most recent call last)
> <ipython-input-8-13783ce9f25e> in <module>
> ----> 1 arr.validate()
> ~/scipy/repos/arrow/python/pyarrow/array.pxi in pyarrow.lib.Array.validate()
> ~/scipy/repos/arrow/python/pyarrow/error.pxi in pyarrow.lib.check_status()
> ArrowInvalid: Expected 0 child arrays in array of type extension<my_struct_type>, got 2
> {code}



--
This message was sent by Atlassian Jira
(v8.3.2#803003)