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https://issues.apache.org/jira/browse/HIVE-23042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17063374#comment-17063374
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Hive QA commented on HIVE-23042:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12997193/HIVE-23042.4.patch
{color:red}ERROR:{color} -1 due to no test(s) being added or modified.
{color:green}SUCCESS:{color} +1 due to 18123 tests passed
Test results:
https://builds.apache.org/job/PreCommit-HIVE-Build/21193/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/21193/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-21193/
Messages:
{noformat}
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
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12997193 - PreCommit-HIVE-Build
> Merge queries to a single one for updating MIN_OPEN_TXNS table
> --------------------------------------------------------------
>
> Key: HIVE-23042
> URL: https://issues.apache.org/jira/browse/HIVE-23042
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Reporter: Peter Vary
> Assignee: Peter Vary
> Priority: Major
> Attachments: HIVE-23042.2.patch, HIVE-23042.3.patch,
> HIVE-23042.4.patch, HIVE-23042.patch
>
>
> When opening a new transaction we issue 2 queries to update the MIN_OPEN_TXN
> table.
> {code}
> <SELECT MIN("TXN_ID") FROM "TXNS" WHERE "TXN_STATE" = 'o'>
> <insert into "MIN_HISTORY_LEVEL" ("MHL_TXNID", "MHL_MIN_OPEN_TXNID")
> values(763, 763)>
> {code}
> This could be archived with a single query faster, if we do not open
> transactions in batch, like:
> {code}
> <INSERT INTO "MIN_HISTORY_LEVEL" ("MHL_TXNID", "MHL_MIN_OPEN_TXNID")
> SELECT ?, MIN("TXN_ID") FROM "TXNS" WHERE "TXN_STATE" = 'o'>
> {code}
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