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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-59163] Enable partial indexes on time-series collections</title>
                <link>https://jira.mongodb.org/browse/SERVER-59163</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When someone creates a partial index on a time-series collection, internally we will create a partial index on the buckets collection.  The user specifies the partialFilterExpression as a predicate on events, but we&apos;ll translate it to a predicate on buckets.&lt;/p&gt;

&lt;p&gt;This sounds identical to how we push down $match predicates past the $_internalUnpackBucket stage.  We should make sure that logic is factored out into some helper that can be called both from DocumentSource::optimize() and from CmdCreateIndexes.&lt;/p&gt;

&lt;p&gt;For example:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Predicates on metadata are pushed down exactly&lt;/li&gt;
	&lt;li&gt;$lt predicates on measurements are pushed down as $lt on control.min&lt;/li&gt;
	&lt;li&gt;$geoWithin is pushed down as $_internalBucketGeoWithin&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="1843590">SERVER-59163</key>
            <summary>Enable partial indexes on time-series collections</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="13201">Fixed</resolution>
                                        <assignee username="david.percy@mongodb.com">David Percy</assignee>
                                    <reporter username="david.percy@mongodb.com">David Percy</reporter>
                        <labels>
                    </labels>
                <created>Fri, 6 Aug 2021 16:32:05 +0000</created>
                <updated>Sun, 29 Oct 2023 21:49:48 +0000</updated>
                            <resolved>Fri, 21 Jan 2022 15:32:24 +0000</resolved>
                                                    <fixVersion>5.3.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4304745" author="xgen-internal-githook" created="Fri, 21 Jan 2022 04:25:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;David Percy&apos;, &apos;email&apos;: &apos;david.percy@mongodb.com&apos;, &apos;username&apos;: &apos;dpercy&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59163&quot; title=&quot;Enable partial indexes on time-series collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59163&quot;&gt;&lt;del&gt;SERVER-59163&lt;/del&gt;&lt;/a&gt; Allow creating partial indexes on time-series collections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/610898a1ccec0afc3d38f7c29f2553d5b6102d30&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/610898a1ccec0afc3d38f7c29f2553d5b6102d30&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4304744" author="xgen-internal-githook" created="Fri, 21 Jan 2022 04:25:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;David Percy&apos;, &apos;email&apos;: &apos;david.percy@mongodb.com&apos;, &apos;username&apos;: &apos;dpercy&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59163&quot; title=&quot;Enable partial indexes on time-series collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59163&quot;&gt;&lt;del&gt;SERVER-59163&lt;/del&gt;&lt;/a&gt; Move time-series predicate rewrites to bucket_unpacker&lt;/p&gt;

&lt;p&gt;We will want to use these rewrites when creating a partial index. But to&lt;br/&gt;
avoid a cyclic dependency, we don&apos;t want to depend on all of the&lt;br/&gt;
&apos;pipeline&apos; library.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e446bef952d2ef42ae799e9b88c877b3fe0be6e4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e446bef952d2ef42ae799e9b88c877b3fe0be6e4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4122536" author="david.percy" created="Wed, 13 Oct 2021 19:40:16 +0000"  >&lt;p&gt;When we generate the bucket-level partialFilterExpression, we should use the simpler rewrite implemented in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60672&quot; title=&quot;Simpler pushdown when timeseries collection has no mixed-schema buckets&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60672&quot;&gt;&lt;del&gt;SERVER-60672&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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            <issuekey id="1897794">SERVER-60672</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="1796451">SERVER-58059</issuekey>
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            <issuekey id="1668584">SERVER-55719</issuekey>
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                                        <issuelink>
            <issuekey id="1971294">SERVER-63000</issuekey>
        </issuelink>
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                                                        </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
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            <issuekey id="1858071">SERVER-59505</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1970233">SERVER-62954</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1858220">SERVER-59508</issuekey>
        </issuelink>
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            <issuekey id="1975141">SERVER-63316</issuekey>
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