[ARROW-12975] [C++][Python] if_else kernel doesn't support upcasting

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0.0
• Component/s: C++, Python
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/28693
• Assignee: Niranda Perera
• Reporter: Niranda Perera
• Created: 04/Jun/21 17:00
• Updated: 11/Jan/23 08:30
• Resolved: 09/Jun/21 18:49

Description

when using type multiple types for `left` and `right` arrays, `if_else` kernel fails. IMO check casting and dispatching logic for the if_else kernel.

>>> pc.if_else([True], [1], [3.5])
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "<string>", line 3, in if_else
 File "pyarrow/_compute.pyx", line 335, in pyarrow._compute.Function.call
 result = GetResultValue(self.base_func.Execute(c_args,
 File "pyarrow/error.pxi", line 141, in pyarrow.lib.pyarrow_internal_check_status
 return check_status(status)
 File "pyarrow/error.pxi", line 118, in pyarrow.lib.check_status
 raise ArrowNotImplementedError(message)
pyarrow.lib.ArrowNotImplementedError: Function if_else has no kernel matching input types (array[bool], array[int64], array[double])

Issue Links

• is a child of: ARROW-10640 [C++] An "if_else" kernel to combine two arrays based on a mask
• links to: GitHub Pull Request #10472