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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-826] Allow indexing of several arrays</title>
                <link>https://jira.mongodb.org/browse/SERVER-826</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;While I understand the N^2 complexity of parallel arrays maybe something could be done? Like, allow a limitation of just how how many items will be indexed from an array? While in theory an array can be any number of element in reality we might know that a certain array will be small.&lt;/p&gt;</description>
                <environment></environment>
        <key id="11613">SERVER-826</key>
            <summary>Allow indexing of several arrays</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="chx">Karoly Negyesi</reporter>
                        <labels>
                    </labels>
                <created>Wed, 24 Mar 2010 15:29:26 +0000</created>
                <updated>Tue, 31 Oct 2023 14:52:59 +0000</updated>
                                                                            <component>Index Maintenance</component>
                                        <votes>10</votes>
                                    <watches>21</watches>
                                                                                                                <comments>
                            <comment id="5842328" author="JIRAUSER1275197" created="Tue, 31 Oct 2023 14:52:59 +0000"  >&lt;p&gt;This is a huge problem for our use case.&lt;/p&gt;

&lt;p&gt;We have a lot of fields with dynamic typing we don&apos;t know in advance if it&apos;s going to be an array or not.&lt;/p&gt;

&lt;p&gt;Since our field can become Arrays at any moment, how are we supposed to sort and index our fields ? We can&apos;t index them because as soon as one of our documents has two or more fields that become Arrays it would fail.&lt;/p&gt;

&lt;p&gt;At least give us an option to bypass this...&lt;/p&gt;</comment>
                            <comment id="86734" author="trayburn" created="Wed, 8 Feb 2012 23:11:49 +0000"  >&lt;p&gt;This is a major impact to a project I&apos;m working on right now, we use arrays in many places, and our Web UI suffers from speed issues due to this limitation.&lt;/p&gt;</comment>
                            <comment id="40134" author="remonvv" created="Fri, 1 Jul 2011 12:06:53 +0000"  >&lt;p&gt;I do not think there should be any limitation put in place on grounds of &quot;idiot proofing&quot;. There are quite a few use cases where an index on multiple small arrays makes sense.&lt;/p&gt;</comment>
                            <comment id="13172" author="chx" created="Wed, 24 Mar 2010 15:30:57 +0000"  >&lt;p&gt;Actually, due to uniformity, Drupal stores 1-element arrays often. Maybe just make an exception for 1-element arrays? That would be tremendous help.&lt;/p&gt;</comment>
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