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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-53574] Support for index on multiple array field</title>
                <link>https://jira.mongodb.org/browse/SERVER-53574</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi Team,&lt;/p&gt;

&lt;p&gt;I know currently MongoDB does not support having an index on the multiple array fields which is causing the implementation issue.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Consider the following example where we have 2 fields which are array and on both of them, we need the indexes.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Consider the following example where we have tags in the document and also that same document is shared among the other branches, now I want to filter the data based on branch and tag something like as follows.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;
&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Fetch the document where the tag is tech, blog and belongs to dev branch&lt;/p&gt;

&lt;p&gt;db.collection.find({tags: {$in: &lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;tech&amp;quot;, &amp;quot;blog&amp;quot;&amp;#93;&lt;/span&gt;}, branches: &quot;dev&quot;}) in order to improve the performance I need the index on both the fields but which is not possible for now.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;The only workaround which I see is to create multiple copies for each branch which will avoid &lt;a href=&quot;https://docs.mongodb.com/manual/core/index-multikey/#compound-multikey-indexes&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/core/index-multikey/#compound-multikey-indexes&lt;/a&gt;&#160;index limitations and it will increase the data size and documents count in the collection.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Thanks,&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1580692">SERVER-53574</key>
            <summary>Support for index on multiple array field</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="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-server-triage">Backlog - Triage Team</assignee>
                                    <reporter username="hitesh.baldaniya@contentstack.com">Hitesh Baldaniya</reporter>
                        <labels>
                    </labels>
                <created>Tue, 5 Jan 2021 04:58:31 +0000</created>
                <updated>Tue, 6 Dec 2022 01:40:36 +0000</updated>
                            <resolved>Tue, 5 Jan 2021 17:49:54 +0000</resolved>
                                                                    <component>Querying</component>
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                                                                                                                <comments>
                            <comment id="3550074" author="hitesh.baldaniya@contentstack.com" created="Wed, 6 Jan 2021 05:25:52 +0000"  >&lt;p&gt;Thanks Eric, I will check the blog post and if facet search or reorganizing data makes sense.&lt;/p&gt;</comment>
                            <comment id="3549195" author="eric.sedor" created="Tue, 5 Jan 2021 17:49:25 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=hitesh.baldaniya%40contentstack.com&quot; class=&quot;user-hover&quot; rel=&quot;hitesh.baldaniya@contentstack.com&quot;&gt;hitesh.baldaniya@contentstack.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;We are tracking this request in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-826&quot; title=&quot;Allow indexing of several arrays&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-826&quot;&gt;SERVER-826&lt;/a&gt;, so I&apos;m going to close this ticket as a duplicate. Can you watch that ticket for updates, and comment there with the value the feature would bring for you?&lt;/p&gt;

&lt;p&gt;For what it&apos;s worth, you may find that a &lt;a href=&quot;https://www.mongodb.com/blog/post/faceted-search-with-mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;faceted search-focused data model&lt;/a&gt; can help with these sorts of queries, depending on your use-case.&lt;/p&gt;

&lt;p&gt;Sincerely,&lt;br/&gt;
Eric&lt;/p&gt;
</comment>
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