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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-55226] Test partitionBy null/missing</title>
                <link>https://jira.mongodb.org/browse/SERVER-55226</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;$setWindowFields implements partitioning by sorting.  We should make sure partitioning works when the partition key is a mixture of nulls and missing.&lt;/p&gt;

&lt;p&gt;Should we coerce missing to null?  ($group does, to ensure the _id field is always present.)  At minimum, we need to make sure that all nulls are in the same partition, and all missings are in the same partition.&lt;/p&gt;

&lt;p&gt;We should also make sure to test compound keys where the components are a mixture of null and missing.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1649993">SERVER-55226</key>
            <summary>Test partitionBy null/missing</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="yuhong.zhang@mongodb.com">Yuhong Zhang</assignee>
                                    <reporter username="david.percy@mongodb.com">David Percy</reporter>
                        <labels>
                    </labels>
                <created>Tue, 16 Mar 2021 15:03:52 +0000</created>
                <updated>Sun, 29 Oct 2023 21:56:15 +0000</updated>
                            <resolved>Mon, 5 Apr 2021 04:24:04 +0000</resolved>
                                                    <fixVersion>5.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="3699262" author="xgen-internal-githook" created="Fri, 2 Apr 2021 19:31:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;danielzhangyh@gmail.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-55226&quot; title=&quot;Test partitionBy null/missing&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-55226&quot;&gt;&lt;del&gt;SERVER-55226&lt;/del&gt;&lt;/a&gt; Test partitionBy null/missing&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/619aa27c13a326b78edc476c72ec446f1c1de236&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/619aa27c13a326b78edc476c72ec446f1c1de236&lt;/a&gt;&lt;/p&gt;</comment>
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