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https://issues.apache.org/jira/browse/FLINK-6891?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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sunjincheng reassigned FLINK-6891:
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Assignee: sunjincheng
> Add LOG supported in SQL
> ------------------------
>
> Key: FLINK-6891
> URL: https://issues.apache.org/jira/browse/FLINK-6891
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Affects Versions: 1.4.0
> Reporter: sunjincheng
> Assignee: sunjincheng
>
> LONG (N) A single parameter version of the function returns the natural
> logarithm of N, and if two arguments are called, it returns any radix of the
> logarithm of N.
> * Syntax:
> LOG ( float_expression [, base ] )
> * Arguments
> **float_expression: Is an expression of type float or of a type that can be
> implicitly converted to float.
> **base: Optional integer argument that sets the base for the logarithm.
> * Return Types
> float
> * Example:
> LOG(10) -> 2.30
> * See more:
> **
> [MSQL|https://docs.microsoft.com/en-us/sql/t-sql/functions/log-transact-sql]
> ** [MySQL|
> https://dev.mysql.com/doc/refman/5.7/en/mathematical-functions.html#function_log]
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