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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-71528] [CQF] Pushdown Not through ComposeA, Default, Constant</title>
                <link>https://jira.mongodb.org/browse/SERVER-71528</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We can extend the NotPushdown rewrite to handle more cases, which can result in better bounds, or at least simpler expressions to evaluate.&lt;/p&gt;

&lt;p&gt;For example (pseudocode):&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Not (ComposeA p1 p2) -&amp;gt; ComposeM (Not p1) (Not p2)
	&lt;ul&gt;
		&lt;li&gt;Should help $nor queries, or more complex boolean expressions.&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;Not (Default e) -&amp;gt; Default (Not e)
	&lt;ul&gt;
		&lt;li&gt;In an EvalFilter context, Default returns either its argument or the negation of its argument.&lt;/li&gt;
		&lt;li&gt;This will help us combine $not with $exists.&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;Not (Constant e) -&amp;gt; Constant (Not e)
	&lt;ul&gt;
		&lt;li&gt;Should help with constant folding.&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2191304">SERVER-71528</key>
            <summary>[CQF] Pushdown Not through ComposeA, Default, Constant</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="chii.huang@mongodb.com">Chi-I Huang</assignee>
                                    <reporter username="david.percy@mongodb.com">David Percy</reporter>
                        <labels>
                            <label>Ideas</label>
                            <label>bonsai-onboarding</label>
                            <label>optimization</label>
                    </labels>
                <created>Mon, 21 Nov 2022 20:08:54 +0000</created>
                <updated>Sun, 29 Oct 2023 21:30:15 +0000</updated>
                            <resolved>Fri, 19 May 2023 20:11:35 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5416636" author="JIRAUSER1273523" created="Thu, 11 May 2023 01:16:38 +0000"  >&lt;p&gt;I figured that Default and Constant here are actually PathDefault and PathConstant as we have already had constant folding to address the simplification of Constant.&lt;/p&gt;</comment>
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            <issuekey id="2337615">SERVER-77020</issuekey>
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            <issuekey id="2337617">SERVER-77021</issuekey>
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            <issuekey id="2337618">SERVER-77022</issuekey>
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