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Posted to issues-all@impala.apache.org by "Yongjun Zhang (JIRA)" <ji...@apache.org> on 2018/10/02 22:49:00 UTC
[jira] [Resolved] (IMPALA-6202) mod and % should be equivalent
[ https://issues.apache.org/jira/browse/IMPALA-6202?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yongjun Zhang resolved IMPALA-6202.
-----------------------------------
Resolution: Fixed
Fix Version/s: Impala 3.1.0
Many thanks to [~tarmstrong], [~vercego], and [~dhecht] for the review and commit.
> mod and % should be equivalent
> ------------------------------
>
> Key: IMPALA-6202
> URL: https://issues.apache.org/jira/browse/IMPALA-6202
> Project: IMPALA
> Issue Type: Bug
> Affects Versions: Impala 2.11.0
> Reporter: Jim Apple
> Assignee: Yongjun Zhang
> Priority: Major
> Fix For: Impala 3.1.0
>
>
> The docs say:
> "mod(numeric_type a, same_type b) Purpose: Returns the modulus of a number. Equivalent to the % arithmetic operator."
> and
> "fmod(double a, double b), fmod(float a, float b) Purpose: Returns the modulus of a floating-point number. Equivalent to the % arithmetic operator."
> But these can't both be true:
> {noformat}
> [localhost:21000] > select typeof(9.9 % 3), typeof(mod(9.9, 3)), typeof(fmod(9.9, 3));
> +-----------------+---------------------+----------------------+
> | typeof(9.9 % 3) | typeof(mod(9.9, 3)) | typeof(fmod(9.9, 3)) |
> +-----------------+---------------------+----------------------+
> | DECIMAL(2,1) | DECIMAL(4,1) | FLOAT |
> +-----------------+---------------------+----------------------+
> {noformat}
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