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Benedict commented on CASSANDRA-8827:
-------------------------------------
Rather than "SAMPLE 10%", it might be nicer to say something like "ERROR < 1%",
or "WITH 10% CHANCE OF 1% ERROR", and sample progressively wider quantities of
data until the probability of the aggregated value being outside of 1% of its
real value is less than 10%
> Aggregate sampling
> ------------------
>
> Key: CASSANDRA-8827
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8827
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Robert Stupp
> Priority: Minor
>
> Aggregations have been implemented in CASSANDRA-4914.
> Some aggregates could benefit from sampling aggregates. (Dump) example:
> {{SELECT avg(value) FROM sales SAMPLE 10 PERCENT}}.
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