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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-17536] Allow multiple &quot;text&quot; indices on a collection</title>
                <link>https://jira.mongodb.org/browse/SERVER-17536</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The manual explains how a compound index that includes a FTS index as one part can significantly optimize queries, since the prefix fields will often narrow down the result set significantly.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/limit-number-of-items-scanned-for-text-search/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/tutorial/limit-number-of-items-scanned-for-text-search/&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;However, creating such a compound index is often not possible, because MongoDB allows only a single FTS index per collection. &lt;/p&gt;

&lt;p&gt;For example, to continue the example from the manual, you may want to sometimes search for &quot;red car&quot; across the entire store, without specifying a dept, while other times specifying the dept is possible and could be used to make the query faster. To enable such an optimization it is now necessary, and reasonable, to have both a top-level FTS index as well as a compound dept+FTS index for the same collection.&lt;/p&gt;

&lt;p&gt;It seems the current limitation to have only one FTS index is arbitrary and should be lifted to allow using one or more compound indexes. (For clarity, having more than one top-level FTS index is of course not useful - at least if we ignore multiple languages and other advanced cases.)&lt;/p&gt;</description>
                <environment></environment>
        <key id="188804">SERVER-17536</key>
            <summary>Allow multiple &quot;text&quot; indices on a collection</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="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-integration">Backlog - Query Integration</assignee>
                                    <reporter username="henrik.ingo@mongodb.com">Henrik Ingo</reporter>
                        <labels>
                            <label>qi-text-search</label>
                    </labels>
                <created>Wed, 11 Mar 2015 08:20:41 +0000</created>
                <updated>Thu, 28 Dec 2023 18:34:06 +0000</updated>
                                                                            <component>Text Search</component>
                                        <votes>4</votes>
                                    <watches>16</watches>
                                                                                                                <comments>
                            <comment id="1942748" author="michael.sudnik@elementar.co.uk" created="Tue, 10 Jul 2018 07:48:33 +0000"  >&lt;p&gt;I have multiple examples where being able to define several text indexes (and selecting which one to use when appropriate) would be useful.&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Data from multiple users being stored in the same collection, but each with their own &quot;schema&quot;.&#160;&lt;/li&gt;
	&lt;li&gt;A collection having &quot;draft&quot; and &quot;published&quot; fields. I would like to switch between searching within the draft / published data.&lt;/li&gt;
&lt;/ol&gt;
</comment>
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