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    <title>MongoDB Jira</title>
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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-67366] Extend $analyzeInternal to create histograms</title>
                <link>https://jira.mongodb.org/browse/SERVER-67366</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Have $_analyzeInternal route inputs to the appropriate histogram builder based on the input. There are four histogram builders &amp;#8211; Scalar, ArrMin, ArrMax, and ArrUnique.&lt;/p&gt;

&lt;p&gt;If the input is not one of the histogrammed types, per the scope document, increment the count in either the array or non-array&lt;/p&gt;


&lt;p&gt;If isArray is false, route to Scalar&lt;/p&gt;

&lt;p&gt;If isArray is true, do the following:&lt;/p&gt;

{

If this is the first time we&apos;ve seen this document ID, route to ArrMin and ArrUnique,&#160; and store the value in a hash table with the document ID as key.

Else If the types of the stored and new value for the document ID don&apos;t match, then sort all stored values, route them to ArrMax, and clear the hash table. Route the new value to ArrMin and ArrUnique and store the new value.

Else If the values of the stored and new values don&apos;t match, then replace the stored value with the new value, and route the new value to ArrUnique.

If the new and stored values match, we ignore the value.

}

&lt;p&gt;Once we&apos;re finished processing, sort all the stored values, then route them to ArrMax.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2071775">SERVER-67366</key>
            <summary>Extend $analyzeInternal to create histograms</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="3">Duplicate</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="joel.redman@mongodb.com">Joel Redman</reporter>
                        <labels>
                    </labels>
                <created>Fri, 17 Jun 2022 18:45:21 +0000</created>
                <updated>Mon, 5 Dec 2022 20:20:53 +0000</updated>
                            <resolved>Wed, 30 Nov 2022 12:56:29 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5018332" author="alya.berciu" created="Wed, 30 Nov 2022 12:56:29 +0000"  >&lt;p&gt;I believe this ticket duplicates &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71513&quot; title=&quot;Support array histograms in statistics&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71513&quot;&gt;&lt;del&gt;SERVER-71513&lt;/del&gt;&lt;/a&gt; which has just been merged, so I&apos;m closing it as a duplicate.&lt;/p&gt;</comment>
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