[
https://issues.apache.org/jira/browse/CASSANDRA-17221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17479067#comment-17479067
]
Simon Chess commented on CASSANDRA-17221:
-----------------------------------------
[~bereng] permission to use the code is given in the preface to the book. It
says “You’re free to use the source code anyway you like”
Here is an online version of the preface: https://apropos-logic.com/demos/
> Add Math functions
> -------------------
>
> Key: CASSANDRA-17221
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17221
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL/Syntax
> Reporter: Benjamin Lerer
> Assignee: Simon Chess
> Priority: Normal
> Labels: AdventCalendar2021, lhf
> Fix For: 4.x
>
>
> We should add native Maths functions for the most common operations:
> * {{abs\(x)}} returns the absolute value of the x
> * {{exp\(x)}} returns the value of e (the base of natural logarithms) raised
> to the power of x
> * {{log\(x)}} returns the natural logarithm (base e) of x
> * {{log10\(x)}} returns the base-10 logarithm of x
> * {{round\(x)}} returns the closest integer to x
> +Additional information for newcomers:+
> The new functions should be put in a new class {{MathFcts}} similar to
> {{TimeFcts}}.
> The {{MathsFcts.all()}} method should be called in
> {{SystemKeyspace.functions}}
> The unit tests for the functions should be put in a {{MathFctsTest}} similar
> to {{TimeFctsTest}}
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org
For additional commands, e-mail: commits-h...@cassandra.apache.org
