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https://issues.apache.org/jira/browse/HIVE-23735?focusedWorklogId=476926&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-476926
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ASF GitHub Bot logged work on HIVE-23735:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 01/Sep/20 00:46
Start Date: 01/Sep/20 00:46
Worklog Time Spent: 10m
Work Description: github-actions[bot] commented on pull request #1165:
URL: https://github.com/apache/hive/pull/1165#issuecomment-684124135
This pull request has been automatically marked as stale because it has not
had recent activity. It will be closed if no further activity occurs.
Feel free to reach out on the d...@hive.apache.org list if the patch is in
need of reviews.
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Issue Time Tracking
-------------------
Worklog Id: (was: 476926)
Time Spent: 20m (was: 10m)
> Reducer misestimate for export command
> --------------------------------------
>
> Key: HIVE-23735
> URL: https://issues.apache.org/jira/browse/HIVE-23735
> Project: Hive
> Issue Type: Improvement
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-23735.1.wip.patch
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java#L6869
> {code}
> if (dest_tab.getNumBuckets() > 0) {
> ...
> }
> {code}
> For "export" command, HS2 creates a dummy table and for this table and gets
> "1" as the number of buckets.
> {noformat}
> set hive.stats.autogather=false;
> export table sample_table to '/tmp/export/sampe_db/t1';
> {noformat}
> This causes issues in reducer estimates and always lands up with '1' as the
> number of reducer task.
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