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From "Hive QA (Jira)" <>
Subject [jira] [Commented] (HIVE-23391) Change requested lock for ALTER TABLE ADD COLUMN to DDL_SHARED
Date Thu, 07 May 2020 17:02:00 GMT


Hive QA commented on HIVE-23391:

Here are the results of testing the latest attachment:

{color:green}SUCCESS:{color} +1 due to 1 test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 1 failed/errored test(s), 17241 tests executed
*Failed tests:*
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[explain_locks] (batchId=84)

Test results:
Console output:
Test logs:

Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 1 tests failed

This message is automatically generated.

ATTACHMENT ID: 13002272 - PreCommit-HIVE-Build

> Change requested lock for ALTER TABLE ADD COLUMN to DDL_SHARED
> --------------------------------------------------------------
>                 Key: HIVE-23391
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Zoltan Chovan
>            Assignee: Zoltan Chovan
>            Priority: Major
>             Fix For: 4.0.0
>         Attachments: HIVE-23391.patch
> A long running query can block a simple add column query, as the add column will require
a DDL_EXCLUSIVE lock currently. By changing this to a shared lock, this metadata only query
can be executed without having to wait for the previous query to finish.

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