liuyan created HIVE-24712: ----------------------------- Summary: hive.map.aggr=false and hive.optimize.reducededuplication=false provide incorrect result on order by with limit Key: HIVE-24712 URL: https://issues.apache.org/jira/browse/HIVE-24712 Project: Hive Issue Type: Improvement Components: CBO Affects Versions: 3.1.0 Reporter: liuyan
When Both param set to false , seems the result is not correct, only 35 rows. This is tested on HDP 3.1.5 set hive.map.aggr=false; set hive.optimize.reducededuplication=false; select cs_sold_date_sk,count(distinct cs_order_number) from tpcds_orc.catalog_sales_orc group by cs_sold_date_sk order by cs_sold_date_sk limit 200; ---------------------------------------------------------------------------------------------- VERTICES MODE STATUS TOTAL COMPLETED RUNNING PENDING FAILED KILLED ---------------------------------------------------------------------------------------------- Map 1 .......... llap SUCCEEDED 33 33 0 0 0 0 Reducer 2 ...... llap SUCCEEDED 4 4 0 0 0 0 Reducer 3 ...... llap SUCCEEDED 4 4 0 0 0 0 Reducer 4 ...... llap SUCCEEDED 1 1 0 0 0 0 ---------------------------------------------------------------------------------------------- VERTICES: 04/04 [==========================>>] 100% ELAPSED TIME: 38.23 s ---------------------------------------------------------------------------------------------- FO : INFO : Task Execution Summary INFO : ---------------------------------------------------------------------------------------------- INFO : VERTICES DURATION(ms) CPU_TIME(ms) GC_TIME(ms) INPUT_RECORDS OUTPUT_RECORDS INFO : ---------------------------------------------------------------------------------------------- INFO : Map 1 38097.00 0 0 143,997,065 57,447 INFO : Reducer 2 9003.00 0 0 57,447 13,108 INFO : Reducer 3 0.00 0 0 13,108 35 INFO : Reducer 4 0.00 0 0 35 0 INFO : ---------------------------------------------------------------------------------------------- INFO : INFO : LLAP IO Summary set hive.map.aggr=true; set hive.optimize.reducededuplication=false; select cs_sold_date_sk,count(distinct cs_order_number) from tpcds_orc.catalog_sales_orc group by cs_sold_date_sk order by cs_sold_date_sk limit 200; ---------------------------------------------------------------------------------------------- VERTICES MODE STATUS TOTAL COMPLETED RUNNING PENDING FAILED KILLED ---------------------------------------------------------------------------------------------- Map 1 .......... llap SUCCEEDED 33 33 0 0 0 0 Reducer 2 ...... llap SUCCEEDED 4 4 0 0 0 0 Reducer 3 ...... llap SUCCEEDED 2 2 0 0 0 0 Reducer 4 ...... llap SUCCEEDED 1 1 0 0 0 0 ---------------------------------------------------------------------------------------------- VERTICES: 04/04 [==========================>>] 100% ELAPSED TIME: 36.24 s ---------------------------------------------------------------------------------------------- INFO : ---------------------------------------------------------------------------------------------- INFO : VERTICES DURATION(ms) CPU_TIME(ms) GC_TIME(ms) INPUT_RECORDS OUTPUT_RECORDS INFO : ---------------------------------------------------------------------------------------------- INFO : Map 1 25595.00 0 0 143,997,065 16,703,757 INFO : Reducer 2 18556.00 0 0 16,703,757 800 INFO : Reducer 3 8018.00 0 0 800 200 INFO : Reducer 4 0.00 0 0 200 0 INFO : ---------------------------------------------------------------------------------------------- INFO : -- This message was sent by Atlassian Jira (v8.3.4#803005)