Yerui Sun created KYLIN-1921: -------------------------------- Summary: Support Grouping Funtions Key: KYLIN-1921 URL: https://issues.apache.org/jira/browse/KYLIN-1921 Project: Kylin Issue Type: New Feature Components: Query Engine Affects Versions: v1.5.4 Reporter: Yerui Sun Assignee: Yerui Sun
Usually we used 'group by dim1, dim2' to fetch the metrics with every value of dims, and we also want the summary metrics with the dim2 rolled up. This case could be resolved by union two query, like: {code} select dim1, dim2 metric from table group by dim1, dim2 union all select dim1, 'ALL', metric from table group by dim1 {code} Now with the expression cube/rollup/grouping sets in calcite, we can make the query sql more simple and more clearly: {code} select dim1, case(grouping(dim2) when 1 then 'ALL' else dim2 end) from table group by grouping sets((dim1, dim2), (dim1)) {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)