[ARROW-3329] [Python] Error casting decimal(38, 4) to int64

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Component/s: Python
• Labels: pull-request-available
• Environment: Python version : 3.6.5 ; Pyarrow version : 0.10.0
• External issue URL: https://github.com/apache/arrow/issues/19664
• Assignee: Jacek Pliszka
• Reporter: Kavita Sheth
• Created: 25/Sep/18 21:57
• Updated: 11/Jan/23 07:26
• Resolved: 23/Apr/20 15:29

Description

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?

Issue Links

• is related to: ARROW-8237 [Python] Review Developer build instructions for conda and non-conda users
• supercedes: ARROW-6990 [C++] Support casting between decimal types with compatible precision/scales
• links to: GitHub Pull Request #6427
• links to: GitHub Pull Request #6846