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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-81376] [CQF] Disable NotPushdown by default</title>
                <link>https://jira.mongodb.org/browse/SERVER-81376</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As part of the discussion for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79205&quot; title=&quot;[CQF] $not $eq array, on a missing field, should return true&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79205&quot;&gt;SERVER-79205&lt;/a&gt;, we decided to disable the NotPushdown rewrite by default to make CQF and classic behavior consistent on queries containing $not. Shortly after M2, we intend to revisit the discussion of comparisons against missing fields in bonsai (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-80239&quot; title=&quot;[CQF] Re-consider comparison against missing fields (Nothing semantics) in ABT&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-80239&quot;&gt;SERVER-80239&lt;/a&gt;) and may be able to re-enable the NotPushdown rewrite. &lt;/p&gt;

&lt;p&gt;As part of this ticket, we may decide to introduce a query knob controlling whether or not the NotPushdown rewrite is enabled.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2449319">SERVER-81376</key>
            <summary>[CQF] Disable NotPushdown by default</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="hana.pearlman@mongodb.com">Hana Pearlman</assignee>
                                    <reporter username="hana.pearlman@mongodb.com">Hana Pearlman</reporter>
                        <labels>
                    </labels>
                <created>Fri, 22 Sep 2023 17:20:38 +0000</created>
                <updated>Mon, 6 Nov 2023 20:38:08 +0000</updated>
                            <resolved>Mon, 6 Nov 2023 20:38:08 +0000</resolved>
                                                    <fixVersion>7.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5858686" author="xgen-internal-githook" created="Mon, 6 Nov 2023 20:37:20 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Hana Pearlman&apos;, &apos;email&apos;: &apos;hana.pearlman@mongodb.com&apos;, &apos;username&apos;: &apos;HanaPearlman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-81376&quot; title=&quot;[CQF] Disable NotPushdown by default&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-81376&quot;&gt;&lt;del&gt;SERVER-81376&lt;/del&gt;&lt;/a&gt;: Disable NotPushdown optimization by default&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/06422aef318436b4b0e8bec12fabcfecd7b84dd6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/06422aef318436b4b0e8bec12fabcfecd7b84dd6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5728826" author="hana.pearlman" created="Mon, 25 Sep 2023 17:14:47 +0000"  >&lt;p&gt;&lt;del&gt;As part of this ticket, we can consider adjusting EvalFilter so that it does not clamp Nothing to false. This would simplify the SBE plans for M2 and would be correct because the clamping was only introduced to support $not queries. However, this would also change the results of some force-bonsai tests which cover $not behavior because it will make it more like to run into &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79205&quot; title=&quot;[CQF] $not $eq array, on a missing field, should return true&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79205&quot;&gt;SERVER-79205&lt;/a&gt;. This is probably acceptable in the short term, as it will be fixed as part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79205&quot; title=&quot;[CQF] $not $eq array, on a missing field, should return true&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79205&quot;&gt;SERVER-79205&lt;/a&gt; and/or &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-80239&quot; title=&quot;[CQF] Re-consider comparison against missing fields (Nothing semantics) in ABT&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-80239&quot;&gt;SERVER-80239&lt;/a&gt;&lt;/del&gt; This is not relevant anymore because we&apos;ve decided to keep $not in the supported list for M2&lt;/p&gt;</comment>
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            <issuekey id="2398277">SERVER-79205</issuekey>
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            <issuekey id="2420937">SERVER-80239</issuekey>
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