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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-25899] Make the distinct command always execute as an aggregation pipeline</title>
                <link>https://jira.mongodb.org/browse/SERVER-25899</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We execute distinct over views as aggregations, but there is no reason that all distinct commands couldn&apos;t internally use the agg path.&lt;/p&gt;

&lt;p&gt;As part of this work, we need to allow the aggregation system to make use of the DISTINCT_SCAN fast path for aggregations that are logically distinct operations.&lt;/p&gt;</description>
                <environment></environment>
        <key id="313141">SERVER-25899</key>
            <summary>Make the distinct command always execute as an aggregation pipeline</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-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Wed, 31 Aug 2016 16:16:23 +0000</created>
                <updated>Tue, 6 Dec 2022 04:17:41 +0000</updated>
                                                                            <component>Querying</component>
                                        <votes>4</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="1431635" author="david.golden" created="Fri, 11 Nov 2016 00:48:12 +0000"  >&lt;p&gt;Please consider addressing &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3141&quot; title=&quot;distinct needs to have a way to output to a cursor for large result sets&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3141&quot;&gt;&lt;del&gt;SERVER-3141&lt;/del&gt;&lt;/a&gt; as part of any overhaul.  I.e. a &quot;distinct_unwrap&quot; stage that outputs any number of documents rather than just a single array which could overflow the BSON document limit.  If the &lt;tt&gt;distinct&lt;/tt&gt; command needs to wrap that back up into an array, fine, but if we really want to support humongous data, we shouldn&apos;t continue to impose an arbitrary limit on the size of a &lt;tt&gt;distinct&lt;/tt&gt; query.&lt;/p&gt;</comment>
                            <comment id="1373964" author="schwerin" created="Wed, 31 Aug 2016 20:56:53 +0000"  >&lt;p&gt;If you do this, please do it to mongos as well.&lt;/p&gt;</comment>
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            <issuekey id="351626">SERVER-27915</issuekey>
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            <issuekey id="17476">SERVER-3141</issuekey>
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            <issuekey id="302750">SERVER-25184</issuekey>
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            <issuekey id="313139">SERVER-25898</issuekey>
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