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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-62376] Fix ABT translation for match expressions which compare against array values</title>
                <link>https://jira.mongodb.org/browse/SERVER-62376</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Current ABTs for&#160;$eq, $exists, $in, and $type can fail when matching against arrays.&lt;/p&gt;

&lt;p&gt;For example {$match: {a: {$eq: &lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;abc&amp;quot;&amp;#93;&lt;/span&gt;}}} should match both {a: &lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;abc&amp;quot;&amp;#93;&lt;/span&gt;} and {a: [&lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;abc&amp;quot;&amp;#93;&lt;/span&gt;]}, though it currently only matches the latter. This is because in the first case PathTraverse will perform comparisons on the array elements (that is, &quot;abc&quot;) but not the top-level array. In SBE the solution seems to be to&#160;&lt;a href=&quot;https://github.com/10gen/mongo/blob/4313a0ff6dc419431998017a20c035439fb083af/src/mongo/db/query/sbe_stage_builder_filter.cpp#L800-L816&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;detect&lt;/a&gt; when a comparison against a top-level array is necessary, and specifically compare against it in addition to the comparison done by the traverse.&lt;/p&gt;

&lt;p&gt;&#160;I think it should be fixed during translation to ABT (as opposed to path lowering, or somewhere else), otherwise either 1) the ABTs produced by translation would be semantically incorrect until lowering or 2) the PathTraverse operator would have a different meaning within an ABT than &quot;traverse&quot; does in an SBE plan.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1958997">SERVER-62376</key>
            <summary>Fix ABT translation for match expressions which compare against array values</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="hana.pearlman@mongodb.com">Hana Pearlman</assignee>
                                    <reporter username="hana.pearlman@mongodb.com">Hana Pearlman</reporter>
                        <labels>
                    </labels>
                <created>Wed, 5 Jan 2022 18:19:39 +0000</created>
                <updated>Tue, 28 Jun 2022 21:16:10 +0000</updated>
                            <resolved>Tue, 25 Jan 2022 13:59:31 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4311943" author="hana.pearlman" created="Tue, 25 Jan 2022 13:59:14 +0000"  >&lt;p&gt;Closing in favor of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-62961&quot; title=&quot;Fix ABT-&amp;gt;SBE lowering of EvalFilter paths to correctly handle comparisons with arrays&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-62961&quot;&gt;&lt;del&gt;SERVER-62961&lt;/del&gt;&lt;/a&gt;; see details there.&lt;/p&gt;</comment>
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