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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-57892] Store empty arrays as empty arrays in MinMaxStore</title>
                <link>https://jira.mongodb.org/browse/SERVER-57892</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, the MinMaxStore stores empty arrays as an array with a single element of &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/timeseries/minmax.h#L60&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;type kUnset&lt;/a&gt; as opposed to an array with no elements in it. This results in the need for &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/timeseries/minmax.cpp#L631-L632&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;an additional check to handle this edge case&lt;/a&gt;. However, the MinMaxStore should really be storing empty arrays as an array with no elements, so we need to investigate where this is happening and make the appropriate change.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1791723">SERVER-57892</key>
            <summary>Store empty arrays as empty arrays in MinMaxStore</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="13202">Works as Designed</resolution>
                                        <assignee username="will.buerger@mongodb.com">Will Buerger</assignee>
                                    <reporter username="kris.satya@mongodb.com">Kris Satya</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Mon, 21 Jun 2021 18:29:09 +0000</created>
                <updated>Fri, 27 Oct 2023 13:52:21 +0000</updated>
                            <resolved>Thu, 20 Oct 2022 19:14:46 +0000</resolved>
                                                                                        <votes>0</votes>
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                            <comment id="4916707" author="JIRAUSER1260438" created="Thu, 20 Oct 2022 19:14:46 +0000"  >&lt;p&gt;After investigation with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=dan.larkin-york%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;dan.larkin-york@mongodb.com&quot;&gt;dan.larkin-york@mongodb.com&lt;/a&gt;, we&apos;ve concluded that the current implementation does not specifically store empty arrays as arrays with an unset element.&lt;/p&gt;

&lt;p&gt;In the case where you have a type mismatch (e.g., object and array) between the min and the max in the MinMaxStore, it may include an unset element as a child of one of them so that the length of their sub-elements is the same. In some cases, this was perceived as storing an empty array as an array with an unset element.&lt;/p&gt;</comment>
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