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https://issues.apache.org/jira/browse/ARROW-3329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17067015#comment-17067015
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Wes McKinney edited comment on ARROW-3329 at 3/25/20, 7:23 PM:
---------------------------------------------------------------

[~jacek.pliszka] can you show us what is going wrong when you are trying to 
follow the source build instructions in 

https://github.com/apache/arrow/blob/master/docs/source/developers/python.rst

? Please be sure to clean out all temporary files from the git repository with 
{{git clean -fdx .}}


was (Author: wesmckinn):
[~jacek.pliszka] can you show us what is going wrong when you are trying to 
follow the source build instructions in 

https://github.com/apache/arrow/blob/master/docs/source/developers/python.rst

? 

> [Python] Error casting decimal(38, 4) to int64
> ----------------------------------------------
>
>                 Key: ARROW-3329
>                 URL: https://issues.apache.org/jira/browse/ARROW-3329
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>         Environment: Python version : 3.6.5
> Pyarrow version : 0.10.0
>            Reporter: Kavita Sheth
>            Assignee: Jacek Pliszka
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 0.17.0
>
>          Time Spent: 7h
>  Remaining Estimate: 0h
>
> Git issue LInk : https://github.com/apache/arrow/issues/2627
> I want to cast pyarrow table column from decimal(38,4) to int64.
> col.cast(pa.int64())
> Error:
>  File "pyarrow/table.pxi", line 443, in pyarrow.lib.Column.cast
>  File "pyarrow/error.pxi", line 89, in pyarrow.lib.check_status
>  pyarrow.lib.ArrowNotImplementedError: No cast implemented from decimal(38, 
> 4) to int64
> Python version : 3.6.5
>  Pyarrow version : 0.10.0
> is it not implemented yet or I am not using it correctly? If not implemented 
> yet, then any work around to cast columns?



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