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https://issues.apache.org/jira/browse/CALCITE-6312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17862450#comment-17862450
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Caican Cai commented on CALCITE-6312:
-------------------------------------

[~tanclary] Thank you, then will log(0) also report an error? I think the SQL 
protocol followed by log and ln should be the same

> Add LOG function (enabled in PostgreSQL library)
> ------------------------------------------------
>
>                 Key: CALCITE-6312
>                 URL: https://issues.apache.org/jira/browse/CALCITE-6312
>             Project: Calcite
>          Issue Type: Sub-task
>            Reporter: James Duong
>            Assignee: Caican Cai
>            Priority: Minor
>
> * We have the BigQuery implementation which has a 1-arg overload that uses 
> base e (ln), and a 2-arg overload which is LOG(value, base)
>  * PostgreSQL's 1-arg version uses base 10 and the 2-arg overload has the 
> order reversed – LOG(base, value)



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