[jira] [Created] (HIVE-15637) Hive/Druid integration: wrong semantics of groupBy query limit with granularity

["Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org>]

Jesus Camacho Rodriguez created HIVE-15637:
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             Summary: Hive/Druid integration: wrong semantics of groupBy query limit with granularity
                 Key: HIVE-15637
                 URL: https://issues.apache.org/jira/browse/HIVE-15637
             Project: Hive
          Issue Type: Bug
          Components: Druid integration
    Affects Versions: 2.2.0
            Reporter: Jesus Camacho Rodriguez
            Assignee: Jesus Camacho Rodriguez
            Priority: Critical


Similar to HIVE-15635, but for GroupBy queries. Limit is applied per granularity unit, not globally for the query.

{code:sql}
SELECT i_brand_id, floor_day(`__time`), max(ss_quantity), sum(ss_wholesale_cost) as s
FROM store_sales_sold_time_subset
GROUP BY i_brand_id, floor_day(`__time`)
ORDER BY s
LIMIT 10;
OK
Plan optimized by CBO.

Stage-0
  Fetch Operator
    limit:-1
    Stage-1
      Map 1 vectorized
      File Output Operator [FS_4]
        Select Operator [SEL_3] (rows=15888 width=0)
          Output:["_col0","_col1","_col2","_col3"]
          TableScan [TS_0] (rows=15888 width=0)
            tpcds_druid_10@store_sales_sold_time_subset,store_sales_sold_time_subset,Tbl:PARTIAL,Col:NONE,Output:["i_brand_id","__time","$f2","$f3"],properties:{"druid.query.json":"{\"queryType\":\"groupBy\",\"dataSource\":\"druid_tpcds_ss_sold_time_subset\",\"granularity\":\"DAY\",\"dimensions\":[\"i_brand_id\"],\"limitSpec\":{\"type\":\"default\",\"limit\":10,\"columns\":[{\"dimension\":\"$f3\",\"direction\":\"ascending\"}]},\"aggregations\":[{\"type\":\"longMax\",\"name\":\"$f2\",\"fieldName\":\"ss_quantity\"},{\"type\":\"doubleSum\",\"name\":\"$f3\",\"fieldName\":\"ss_wholesale_cost\"}],\"intervals\":[\"1900-01-01T00:00:00.000Z/3000-01-01T00:00:00.000Z\"]}","druid.query.type":"groupBy"}
{code}



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