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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-85241] Implement classic_runtime_planner_for_sbe::SubPlanner</title>
                <link>https://jira.mongodb.org/browse/SERVER-85241</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Ideally, when we do subplanning, we should:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Plan subqueries by first trying to look them up in SBE plan cache and if it fails, using classic multi planner.&lt;/li&gt;
	&lt;li&gt;Cache subqueries in SBE plan cache with PlanCachingMode::SometimesCache.&lt;/li&gt;
	&lt;li&gt;Create a composite QuerySolution.&lt;/li&gt;
	&lt;li&gt;Build and cache an SBE executor for the composite solution. The plan should be cached with isPinned:true.&lt;/li&gt;
	&lt;li&gt;Run SBE executor.&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;To do this as written, we need to expand SBE plan cache with some meta information, to be able to tag query with appropriate indexes, using cache entry, so we don&apos;t need to multi plan each branch of sub plan.&lt;/p&gt;

&lt;p&gt;If this proves too complex or require too much memory, we should just always multi plan each branch.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2546292">SERVER-85241</key>
            <summary>Implement classic_runtime_planner_for_sbe::SubPlanner</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10018" iconUrl="https://jira.mongodb.org/images/icons/statuses/visible.png" description="">In Code Review</status>
                    <statusCategory id="4" key="indeterminate" colorName="inprogress"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="adi.agrawal@mongodb.com">Adi Agrawal</assignee>
                                    <reporter username="ivan.fefer@mongodb.com">Ivan Fefer</reporter>
                        <labels>
                    </labels>
                <created>Tue, 16 Jan 2024 14:01:19 +0000</created>
                <updated>Fri, 2 Feb 2024 23:21:01 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>2</watches>
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