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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Work logged] (HIVE-19113) Bucketing: Make CLUSTERED BY do CLUSTER BY if no explicit sorting is specified
Date Tue, 23 Jul 2019 03:50:00 GMT


ASF GitHub Bot logged work on HIVE-19113:

                Author: ASF GitHub Bot
            Created on: 23/Jul/19 03:49
            Start Date: 23/Jul/19 03:49
    Worklog Time Spent: 10m 
      Work Description: jcamachor commented on pull request #731: HIVE-19113

 File path: ql/src/test/results/clientpositive/llap/dynamic_semijoin_reduction_3.q.out
 @@ -582,7 +584,7 @@ STAGE PLANS:
         Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
         Reducer 5 <- Reducer 3 (SIMPLE_EDGE)
         Reducer 6 <- Reducer 3 (SIMPLE_EDGE)
-        Reducer 7 <- Reducer 3 (CUSTOM_SIMPLE_EDGE)
 Review comment:
   In fact, the other branches (DELETE and UPDATE) did not change, which seems fine too.
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Issue Time Tracking

    Worklog Id:     (was: 280791)
    Time Spent: 1h 10m  (was: 1h)

> Bucketing: Make CLUSTERED BY do CLUSTER BY if no explicit sorting is specified
> ------------------------------------------------------------------------------
>                 Key: HIVE-19113
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>          Components: Logical Optimizer
>    Affects Versions: 3.0.0
>            Reporter: Gopal V
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-19113.01.patch, HIVE-19113.patch
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
> The user's expectation of 
> "create external table bucketed (key int) clustered by (key) into 4 buckets stored as
> is that the table will cluster the key into 4 buckets, while the file layout does not
do any actual clustering of rows.
> In the absence of a "SORTED BY", this can automatically do a "SORTED BY (key)" to cluster
the keys within the file as expected.

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