Dragoș Moldovan-Grünfeld created ARROW-15166:
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Summary: [C++] Implement an array_filter kernel for decimal256
Key: ARROW-15166
URL: https://issues.apache.org/jira/browse/ARROW-15166
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Dragoș Moldovan-Grünfeld
This surfaced in some of the R unit tests. I believe the expected behaviour
would be to return an empty {{chunked array}}. Reproducible example:
{code:r}
suppressMessages(library(arrow))
empty_filter <- ChunkedArray$create(type = bool())
one_empty_chunk <- ChunkedArray$create(type = decimal128(4, 2))
one_empty_chunk$Filter(empty_filter)
#> ChunkedArray
#> [
#>
#> ]
one_empty_chunk <- ChunkedArray$create(type = decimal256(4, 2))
one_empty_chunk$Filter(empty_filter)
#>Error: NotImplemented: Function array_filter has no kernel matching input
types (array[decimal256(4, 2)], array[bool])
{code}
[This
suite|https://github.com/apache/arrow/blob/04641a38ee5da0fa1d745fd29fd4a206719338cd/r/tests/testthat/test-chunked-array.R#L209-L236]
of unit tests were introduced as part of ARROW-13761.
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