[jira] [Resolved] (ARROW-8924) [C++][Gandiva] castDATE_date32() may cause overflow

["Kouhei Sutou (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-8924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kouhei Sutou resolved ARROW-8924.
---------------------------------
    Fix Version/s: 1.0.0
       Resolution: Fixed

Issue resolved by pull request 7260
[https://github.com/apache/arrow/pull/7260]

> [C++][Gandiva] castDATE_date32() may cause overflow
> ---------------------------------------------------
>
>                 Key: ARROW-8924
>                 URL: https://issues.apache.org/jira/browse/ARROW-8924
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++ - Gandiva
>            Reporter: Kazuaki Ishizaki
>            Assignee: Kazuaki Ishizaki
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 1.0.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> The following code in `cpp/src/gandiva/precompiled/time.cc` may cause overflow since `int32` * `int32` is `int32`, then it is converted to `int64`. The result of `int32` may loose the part of the result of the multiplication
>  
> {code:java}
> gdv_date64 castDATE_date32(gdv_date32 days) { return days * MILLIS_IN_DAY; } {code}



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