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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-63553] Add support for multiple collection in SlotBasedStageBuilder</title>
                <link>https://jira.mongodb.org/browse/SERVER-63553</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;SlotBasedStageBuilder currently assumes that the entire plan refers to a single collection, and only that collection reference is used when building scans.&lt;/p&gt;

&lt;p&gt;This assumption is no longer true, when adding support to $lookup, as the $lookup references foreign collections.&lt;/p&gt;

&lt;p&gt;We need to modify SlotBaseStageBuilder to provide access to all referenced collections. Possibly by using:&lt;br/&gt;
map of string -&amp;gt; CollectionPtr  _collections. &lt;br/&gt;
in the StageBuilder instead of just:&lt;br/&gt;
const CollectionPtr&amp;amp; _collection&lt;/p&gt;</description>
                <environment></environment>
        <key id="1981596">SERVER-63553</key>
            <summary>Add support for multiple collection in SlotBasedStageBuilder</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="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="mihai.andrei@mongodb.com">Mihai Andrei</assignee>
                                    <reporter username="anna.wawrzyniak@mongodb.com">Anna Wawrzyniak</reporter>
                        <labels>
                    </labels>
                <created>Thu, 10 Feb 2022 21:29:46 +0000</created>
                <updated>Sun, 29 Oct 2023 21:42:39 +0000</updated>
                            <resolved>Mon, 7 Mar 2022 15:05:00 +0000</resolved>
                                                    <fixVersion>6.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4392797" author="xgen-internal-githook" created="Fri, 4 Mar 2022 22:33:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mihai Andrei&apos;, &apos;email&apos;: &apos;mihai.andrei@10gen.com&apos;, &apos;username&apos;: &apos;mtandrei&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63553&quot; title=&quot;Add support for multiple collection in SlotBasedStageBuilder&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63553&quot;&gt;&lt;del&gt;SERVER-63553&lt;/del&gt;&lt;/a&gt; Support multi-collection plans in SlotBasedStageBuilder and construct inner ScanStage for EqLookupNodes which use NestedLoopJoin&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b209ff10e948371a4f848a836f71aa54ac79b2f4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b209ff10e948371a4f848a836f71aa54ac79b2f4&lt;/a&gt;&lt;/p&gt;</comment>
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