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https://issues.apache.org/jira/browse/ARROW-10234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Praveen Kumar resolved ARROW-10234.
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Fix Version/s: 2.0.0
Resolution: Fixed
Issue resolved by pull request 8398
[https://github.com/apache/arrow/pull/8398]
> [C++][Gandiva] Fix logic of round() for floats/decimals in Gandiva
> ------------------------------------------------------------------
>
> Key: ARROW-10234
> URL: https://issues.apache.org/jira/browse/ARROW-10234
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++ - Gandiva
> Reporter: Sagnik Chakraborty
> Assignee: Sagnik Chakraborty
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.0.0
>
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
> round() for floats/doubles is returning incorrect results for some edge
> cases, like round(cast(1.55 as float), 1) gives 1.6, but it should be 1.5,
> since the result after casting to float comes to 1.5499999523162842, due to
> inaccurate representation of floating point numbers in memory. Removing an
> intermediate explicit cast to float statement for a double value, which is
> used in subsequent computations, minimises the error introduced due to the
> incorrect representation.
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