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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-70655] Implement timeseries bounded sort optimization to use planning information instead of runtime information</title>
                <link>https://jira.mongodb.org/browse/SERVER-70655</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently timeseries bounded sort optimization is implemented after we already created an execution plan: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/6f450a3cea6287612329f44e90536d72fe7c16c5/src/mongo/db/pipeline/pipeline_d.cpp#L1225&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/6f450a3cea6287612329f44e90536d72fe7c16c5/src/mongo/db/pipeline/pipeline_d.cpp#L1225&lt;/a&gt;&#160;&lt;/p&gt;

&lt;p&gt;Because of this, to decide if we can do this optimization, we have to introspect PlanExecutorImpl and extract runtime information, such as sort order provided by the query, in a complex way, instead of using query planning interface, provided by QuerySolution.&lt;/p&gt;

&lt;p&gt;This also makes the code fragile.&lt;br/&gt;
For example, implementing exclusion projection pushdown (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61284&quot; title=&quot;$project to exclude an array is expensive and scales poorly as the number of threads increases&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61284&quot;&gt;&lt;del&gt;SERVER-61284&lt;/del&gt;&lt;/a&gt;) breaks the code, because it doesn&apos;t support PROJECTION_* nodes as root of query execution tree.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2161241">SERVER-70655</key>
            <summary>Implement timeseries bounded sort optimization to use planning information instead of runtime information</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="ivan.fefer@mongodb.com">Ivan Fefer</reporter>
                        <labels>
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                <created>Tue, 18 Oct 2022 09:34:29 +0000</created>
                <updated>Sat, 9 Dec 2023 02:44:05 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="5937699" author="JIRAUSER1259274" created="Sat, 9 Dec 2023 02:44:05 +0000"  >&lt;p&gt;Removing from PM-3163 as the project&apos;s scope has changed to include last point optimization only.&lt;/p&gt;</comment>
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