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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-46270] Optimize postBatchResumeToken and latestOpLogTimestamp retrieval in PlanExecutor</title>
                <link>https://jira.mongodb.org/browse/SERVER-46270</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, the find or getMore commands tries to retrieve a postBatchResumeToken for each document in a batch, unconditionally calling PlanExecutor::getPostBatchResumeToken() even though the execution tree doesn&apos;t contain a stage which can produce the token.&lt;/p&gt;

&lt;p&gt;Moreover, the implementation of the PlanExecutor::getPostBatchResumeToken() method is sub-optimal, as we traverse the entire execution tree trying twice to find either ChangeStreamProxyStage or CollectionScan.&lt;/p&gt;

&lt;p&gt;Similarly is PlanExecutor::getLatestOplogTimestamp().&lt;/p&gt;

&lt;p&gt;We can optimize these methods to avoid the need to traverse the execution tree over and over again, and only call these methods when we know upfront that the execution can produce a postBatchResumeToken or latestOpLogTimestamp.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1165403">SERVER-46270</key>
            <summary>Optimize postBatchResumeToken and latestOpLogTimestamp retrieval in PlanExecutor</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="anton.korshunov@mongodb.com">Anton Korshunov</assignee>
                                    <reporter username="anton.korshunov@mongodb.com">Anton Korshunov</reporter>
                        <labels>
                            <label>qexec-team</label>
                    </labels>
                <created>Thu, 20 Feb 2020 09:12:53 +0000</created>
                <updated>Sun, 29 Oct 2023 22:12:00 +0000</updated>
                            <resolved>Wed, 26 Feb 2020 10:21:20 +0000</resolved>
                                                    <fixVersion>4.3.4</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2909716" author="xgen-internal-githook" created="Wed, 26 Feb 2020 08:58:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Anton Korshunov&apos;, &apos;username&apos;: &apos;antkorsh&apos;, &apos;email&apos;: &apos;anton.korshunov@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46270&quot; title=&quot;Optimize postBatchResumeToken and latestOpLogTimestamp retrieval in PlanExecutor&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46270&quot;&gt;&lt;del&gt;SERVER-46270&lt;/del&gt;&lt;/a&gt; Optimize postBatchResumeToken and latestOpLogTimestamp retrieval in PlanExecutor&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6bbb8a83a1df51bf88d18961425501301915fc0a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6bbb8a83a1df51bf88d18961425501301915fc0a&lt;/a&gt;&lt;/p&gt;</comment>
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