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https://issues.apache.org/jira/browse/CALCITE-6456?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Caican Cai updated CALCITE-6456:
--------------------------------
Summary: The MySQL log function rule LOG(x, base) is equivalent to
LOG(base)/LOG(x) (was: The Mysql log function rule LOG(x, base) is equivalent
to LOG(base)/LOG(x))
> The MySQL log function rule LOG(x, base) is equivalent to LOG(base)/LOG(x)
> --------------------------------------------------------------------------
>
> Key: CALCITE-6456
> URL: https://issues.apache.org/jira/browse/CALCITE-6456
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.37.0
> Reporter: Caican Cai
> Priority: Major
> Fix For: 1.38.0
>
>
> The fact should be that the log function in mysql should be equivalent to
> LOG(x, base) is equivalent to LOG(x)/LOG(base), and the calculation is not
> the same as bigquery
> bigquery:
> {code:java}
> select log(8, 64)
> 0.5{code}
> postgres:
> {code:java}
> select log(8,64)
> 2{code}
> mysql:
> {code:java}
> select log(8, 64)
> 2 {code}
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