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https://issues.apache.org/jira/browse/CALCITE-6237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17813873#comment-17813873
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Caican Cai commented on CALCITE-6237:
-------------------------------------
I don't understand many aspects of calcite, and I have to admit that I am a
little anxious. I will learn this knowledge and fix this jira. I am sorry for
causing trouble to all committers in the process. Thank you for your guidance
> Using fractions in LOG function does not return correct results
> ---------------------------------------------------------------
>
> Key: CALCITE-6237
> URL: https://issues.apache.org/jira/browse/CALCITE-6237
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.36.0
> Reporter: Caican Cai
> Priority: Major
> Fix For: 1.37.0
>
>
> {code:java}
> mysql> SELECT LOG10(2/3) AS result;
> +---------------------+
> | result |
> +---------------------+
> | -0.1760912594899757 |
> +---------------------+
> 1 row in set (0.00 sec)
> mysql> SELECT LOG2(0) AS result;
> +--------+
> | result |
> +--------+
> | NULL |
> +--------+
> 1 row in set, 1 warning (0.01 sec)
> mysql> SELECT LOG2(2/3) AS result;
> +---------------------+
> | result |
> +---------------------+
> | -0.5849625021638512 |
> +---------------------+
> 1 row in set (0.00 sec)
> {code}
> When using Calcite's Log2 and Log10 functions, if the parameter is a
> fraction, the integer digits will be retained by default. I think this is
> wrong. Several decimal places (such as tens) should be retained by default.
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