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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HIVE-23723) Limit operator pushdown through LOJ
Date Wed, 05 Aug 2020 13:43:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-23723?focusedWorklogId=466793&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-466793
]

ASF GitHub Bot logged work on HIVE-23723:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 05/Aug/20 13:42
            Start Date: 05/Aug/20 13:42
    Worklog Time Spent: 10m 
      Work Description: zeroflag commented on a change in pull request #1323:
URL: https://github.com/apache/hive/pull/1323#discussion_r465735061



##########
File path: ql/src/test/results/clientpositive/llap/explainuser_1.q.out
##########
@@ -124,27 +124,25 @@ Stage-3
                   <-Reducer 2 [SIMPLE_EDGE] llap
                     File Output Operator [FS_7]
                       table:{"name:":"default.src_orc_merge_test_part_n1"}
-                      Select Operator [SEL_6] (rows=100 width=95)
+                      Select Operator [SEL_4] (rows=100 width=178)
                         Output:["_col0","_col1"]
                         Limit [LIM_5] (rows=100 width=178)
                           Number of rows:100
-                          Select Operator [SEL_4] (rows=100 width=178)
-                            Output:["_col0","_col1"]
-                          <-Map 1 [CUSTOM_SIMPLE_EDGE] llap
-                            PARTITION_ONLY_SHUFFLE [RS_3]
-                              Limit [LIM_2] (rows=100 width=178)
-                                Number of rows:100
-                                Select Operator [SEL_1] (rows=500 width=178)
-                                  Output:["_col0","_col1"]
-                                  TableScan [TS_0] (rows=500 width=178)
-                                    default@src,src,Tbl:COMPLETE,Col:COMPLETE,Output:["key","value"]
+                        <-Map 1 [CUSTOM_SIMPLE_EDGE] llap
+                          PARTITION_ONLY_SHUFFLE [RS_3]
+                            Limit [LIM_2] (rows=100 width=178)

Review comment:
       fixed




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 466793)
    Time Spent: 1h 10m  (was: 1h)

> Limit operator pushdown through LOJ
> -----------------------------------
>
>                 Key: HIVE-23723
>                 URL: https://issues.apache.org/jira/browse/HIVE-23723
>             Project: Hive
>          Issue Type: Improvement
>          Components: Hive
>            Reporter: Attila Magyar
>            Assignee: Attila Magyar
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> Limit operator (without an order by) can be pushed through SELECTS and LEFT OUTER JOINs.



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