[jira] [Commented] (CASSANDRA-4914) Aggregation functions in CQL

["Sylvain Lebresne (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14100672#comment-14100672 ] 

Sylvain Lebresne commented on CASSANDRA-4914:
---------------------------------------------

Updating the title to refect that for this ticket we'll stick to aggregation functions. We've already introduced some UDFs in CASSANDRA-7395 so we'll want to try to reuse as much as possible here in term of syntax, though obviously the interface for aggregation functions will be slightly different.

> Aggregation functions in CQL
> ----------------------------
>
>                 Key: CASSANDRA-4914
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4914
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Vijay
>            Assignee: Benjamin Lerer
>              Labels: cql
>             Fix For: 3.0
>
>
> The requirement is to do aggregation of data in Cassandra (Wide row of column values of int, double, float etc).
> With some basic agree gate functions like AVG, SUM, Mean, Min, Max, etc (for the columns within a row).
> Example:
> SELECT * FROM emp WHERE empID IN (130) ORDER BY deptID DESC;                                    
>  empid | deptid | first_name | last_name | salary
> -------+--------+------------+-----------+--------
>    130 |      3 |     joe    |     doe   |   10.1
>    130 |      2 |     joe    |     doe   |    100
>    130 |      1 |     joe    |     doe   |  1e+03
>  
> SELECT sum(salary), empid FROM emp WHERE empID IN (130);                                    
>  sum(salary) | empid
> -------------+--------
>    1110.1    |  130



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