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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-78297] [CQF] Introduce and enforce RemoveOrphans physical property</title>
                <link>https://jira.mongodb.org/browse/SERVER-78297</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Add a new physical property to cascades which represents the need to perform shard filtering (remove orphaned documents/values from a stream). Write an enforcer for this property. Implementers for this property will be taken on incrementally in follow-up tickets.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2373736">SERVER-78297</key>
            <summary>[CQF] Introduce and enforce RemoveOrphans physical property</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="ben.shteinfeld@mongodb.com">Ben Shteinfeld</assignee>
                                    <reporter username="ben.shteinfeld@mongodb.com">Ben Shteinfeld</reporter>
                        <labels>
                    </labels>
                <created>Wed, 21 Jun 2023 15:47:35 +0000</created>
                <updated>Sun, 29 Oct 2023 21:19:42 +0000</updated>
                            <resolved>Fri, 7 Jul 2023 14:36:22 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="5549430" author="xgen-internal-githook" created="Fri, 7 Jul 2023 01:36:41 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Ben Shteinfeld&apos;, &apos;email&apos;: &apos;ben.shteinfeld@mongodb.com&apos;, &apos;username&apos;: &apos;bshteinfeld&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78297&quot; title=&quot;[CQF] Introduce and enforce RemoveOrphans physical property&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78297&quot;&gt;&lt;del&gt;SERVER-78297&lt;/del&gt;&lt;/a&gt; Introduce and enforce `RemoveOrphansRequirement`&lt;/p&gt;

&lt;p&gt;This patch implements barebones support for Bonsai to start generating physical plans that perform shard filtering.&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Add bit to optimizer metadata to indicate whether a `ScanDefinition` can have orphans.&lt;/li&gt;
	&lt;li&gt;Introduce new physical property, `RemoveOrphansRequirement`, which indicates whether a group needs to perform shard filtering.&lt;/li&gt;
	&lt;li&gt;Write an enforcer rewrite which satisfies `RemoveOrphansRequirement` by inserting an `EvaluationNode` for each field of the shard key from the scan projection and inserting a `FilterNode` that uses those projections to invoke the `shardFilter` SBE builtin.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;This patch only ever satisfies `RemoveOrphansRequirement` with a fetch. We will support shard filtering over index keys (enabling covered plans) in a followup.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/812fc17a43496511c230f14a5d3618d8aa434d09&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/812fc17a43496511c230f14a5d3618d8aa434d09&lt;/a&gt;&lt;/p&gt;</comment>
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