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Posted to issues@kylin.apache.org by "JunAn Chen (JIRA)" <ji...@apache.org> on 2016/05/16 02:54:12 UTC

[jira] [Created] (KYLIN-1693) Support multiple group-by columns for TOP_N meausre

JunAn Chen created KYLIN-1693:
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             Summary: Support multiple group-by columns for TOP_N meausre
                 Key: KYLIN-1693
                 URL: https://issues.apache.org/jira/browse/KYLIN-1693
             Project: Kylin
          Issue Type: New Feature
          Components: Query Engine
    Affects Versions: v1.5.1
            Reporter: JunAn Chen
            Assignee: liyang


For this case:
table name : "tbl"
columns:  (dim_city, dim_industry, keyword, pv)

the "keyword" column has a large cardinality, for about ten million.

currently I can build "top100 pv" in (dim_city), (dim_industry). 
But I also want to build "top100 pv" in (dim_city, dim_industry) and "top100 pv of keyword" in (dim_city), (dim_industry) and (dim_city, dim_industrt).



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