fengYu created KYLIN-2064:
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Summary: add non-runtime-aggregation measure support
Key: KYLIN-2064
URL: https://issues.apache.org/jira/browse/KYLIN-2064
Project: Kylin
Issue Type: Improvement
Affects Versions: v1.5.2
Reporter: fengYu
Assignee: fengYu
Kylin is based on pre-computation and store result in hbase. however, It
support runtime aggregation to satisfy the query which can not match computed
data.
But the runtime aggregation slow down the query and need more storage space in
hbase(which will slow down scan speed), such as distinct count/ topn measures .
So we can use more pre-compution and less runtime aggregation, in some scenario
we do not need results cross different partition(date), we add a kind of
measure which only support result for count distinct, it will speed up query
and need less storage.
what's more, If a query on this measure which is not computed it will return
exception.
I will arrange our solution in my patch later.
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