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https://issues.apache.org/jira/browse/CASSANDRA-9977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15046389#comment-15046389
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Robert Stupp commented on CASSANDRA-9977:
-----------------------------------------
The reason why I've "changed" the aggregates' return type from {{counter}} to
{{bigint}} is that for me t's more intuitive as you don't get a real "counter"
back from these functions. Mean, if you {{sum}} on counter column values, you
add their _current values_ and get one _value_ back - but not a counter. Want
to say: you no longer have a counter but just a value which is then
"independent" from its origin. WDYT?
> Support counter-columns for native aggregates (sum,avg,max,min)
> ---------------------------------------------------------------
>
> Key: CASSANDRA-9977
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9977
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL
> Reporter: Noam Liran
> Assignee: Robert Stupp
> Fix For: 2.2.x
>
>
> When trying to SUM a column of type COUNTER, this error is returned:
> {noformat}
> InvalidRequest: code=2200 [Invalid query] message="Invalid call to function
> sum, none of its type signatures match (known type signatures: system.sum :
> (tinyint) -> tinyint, system.sum : (smallint) -> smallint, system.sum : (int)
> -> int, system.sum : (bigint) -> bigint, system.sum : (float) -> float,
> system.sum : (double) -> double, system.sum : (decimal) -> decimal,
> system.sum : (varint) -> varint)"
> {noformat}
> This might be relevant for other agg. functions.
> CQL for reproduction:
> {noformat}
> CREATE TABLE test (
> key INT,
> ctr COUNTER,
> PRIMARY KEY (
> key
> )
> );
> UPDATE test SET ctr = ctr + 1 WHERE key = 1;
> SELECT SUM(ctr) FROM test;
> {noformat}
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