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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-17854] Allow $or predicates to be indexed by partial indexes</title>
                <link>https://jira.mongodb.org/browse/SERVER-17854</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The 3.1.1 version of partial indexes decides if a given query is compatible with a given partial index by checking if the query&apos;s root predicate describes a subset of the documents that the partial index document filter describes.  However, this does not allow $or predicates to be indexed by partial indexes, as $or predicates are indexed by a union of scans on separate indexes.&lt;/p&gt;

&lt;p&gt;This would allow the following query to be answerable by a union of scans on the following two indexes:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;query: find({$or: [{a: 1, f: true}, {b: 1}]})&lt;/li&gt;
	&lt;li&gt;index #1: key pattern {a: 1}, partial index document filter {f: true}&lt;/li&gt;
	&lt;li&gt;index #2: key pattern {b: 1}&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="193569">SERVER-17854</key>
            <summary>Allow $or predicates to be indexed by partial indexes</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="9">Done</resolution>
                                        <assignee username="rassi">J Rassi</assignee>
                                    <reporter username="rassi">J Rassi</reporter>
                        <labels>
                    </labels>
                <created>Wed, 1 Apr 2015 23:21:57 +0000</created>
                <updated>Fri, 5 Feb 2016 14:29:02 +0000</updated>
                            <resolved>Tue, 23 Jun 2015 22:54:11 +0000</resolved>
                                                    <fixVersion>3.1.5</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="948733" author="xgen-internal-githook" created="Tue, 23 Jun 2015 22:52:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;jrassi&apos;, u&apos;name&apos;: u&apos;Jason Rassi&apos;, u&apos;email&apos;: u&apos;rassi@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17854&quot; title=&quot;Allow $or predicates to be indexed by partial indexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17854&quot;&gt;&lt;del&gt;SERVER-17854&lt;/del&gt;&lt;/a&gt; Move partial idx selection logic to QueryPlannerIXSelect&lt;/p&gt;

&lt;p&gt;Also replaces index_partial_queryplanner.js with unit test&lt;br/&gt;
query_planner_partialidx_test.cpp.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f9311e512c9150280d26f0840cbe94a31c9b5a19&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f9311e512c9150280d26f0840cbe94a31c9b5a19&lt;/a&gt;&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="198413">SERVER-18092</issuekey>
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            <issuekey id="217875">SERVER-19511</issuekey>
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