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https://issues.apache.org/jira/browse/HIVE-22512?focusedWorklogId=442352&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-442352
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ASF GitHub Bot logged work on HIVE-22512:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 07/Jun/20 00:25
Start Date: 07/Jun/20 00:25
Worklog Time Spent: 10m
Work Description: github-actions[bot] commented on pull request #847:
URL: https://github.com/apache/hive/pull/847#issuecomment-640136371
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: 442352)
Time Spent: 1h 40m (was: 1.5h)
> Use direct SQL to fetch column privileges in refreshPrivileges
> --------------------------------------------------------------
>
> Key: HIVE-22512
> URL: https://issues.apache.org/jira/browse/HIVE-22512
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Affects Versions: 4.0.0
> Reporter: Ashutosh Bapat
> Assignee: Ashutosh Bapat
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-22512.01.patch, HIVE-22512.02.patch,
> HIVE-22512.03.patch
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> refreshPrivileges() calls listTableAllColumnGrants() to fetch the column
> level privileges. The later function retrieves the individual column objects
> by firing one query per column privilege object, thus causing the backend db
> to be swamped by these queries when PrivilegeSynchronizer is run.
> PrivilegeSynchronizer synchronizes privileges of all the databases, tables
> and columns and thus the backend db can get swamped really bad when there are
> thousands of tables with hundreds of columns.
> The output of listTableAllColumnGrants() is not used completely so all the
> columns the PM has tried to retrieves anyway goes waste.
> Fix this by using direct SQL to fetch column privileges.
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