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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>[DOCS-11206] Docs for SERVER-1981: Support $near and $nearSphere predicates on sharded collections</title>
                <link>https://jira.mongodb.org/browse/DOCS-11206</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
&lt;p&gt;The &lt;tt&gt;$near&lt;/tt&gt; and &lt;tt&gt;$nearSphere&lt;/tt&gt; query operators are now supported on sharded collections.&lt;/p&gt;

&lt;h2&gt;&lt;a name=&quot;Scopeofwork&quot;&gt;&lt;/a&gt;Scope of work&lt;/h2&gt;

&lt;p&gt;$near&lt;br/&gt;
$nearSphere&lt;br/&gt;
geospatial-queries&lt;/p&gt;

&lt;h2&gt;&lt;a name=&quot;EngineeringTicketDescription%3A&quot;&gt;&lt;/a&gt;Engineering Ticket Description:&lt;/h2&gt;

&lt;p&gt;Currently, users who wish to execute near queries against sharded collections must use either the &lt;a href=&quot;https://docs.mongodb.com/v3.6/reference/command/geoNear/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;geoNear command&lt;/a&gt; or the &lt;a href=&quot;https://docs.mongodb.com/v3.6/reference/operator/aggregation/geoNear/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;$geoNear aggregation stage&lt;/a&gt;. The &lt;a href=&quot;https://docs.mongodb.com/v3.6/reference/operator/query/near/#op._S_near&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;$near&lt;/a&gt; and &lt;a href=&quot;https://docs.mongodb.com/v3.6/reference/operator/query/nearSphere/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;$nearSphere&lt;/a&gt; query predicates, on the other hand, will fail when issued against a sharded collection. We should add support for sharded $near/$nearSphere, especially given future plans to mark the query the geoNear command as deprecated.&lt;/p&gt;

&lt;p&gt;One way to accomplish this would be to make use of the existing &quot;geoNearDistance&quot; &lt;tt&gt;$meta&lt;/tt&gt; projection. In this design, the mongos query path would extend a &lt;tt&gt;$near&lt;/tt&gt; query to project the &quot;geoNearDistance&quot; metadata as teh sort key. The query issued from mongos to the shards would look something like this:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; db.c.find({a: {$nearSphere: [1, 1]}}, {$sortKey: {$meta: &quot;geoNearDistance&quot;}})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ &quot;_id&quot; : ObjectId(&quot;599c54f2c4ed9620c11bd27b&quot;), &quot;a&quot; : [ 1, 1 ], &quot;$sortKey&quot; : 0 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ &quot;_id&quot; : ObjectId(&quot;599c577621d4e4bc06f8c498&quot;), &quot;a&quot; : [ 1, 2 ], &quot;$sortKey&quot; : 0.0174532925199433 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;The AsyncResultsMerger, which merges query results on mongos, already knows how to interpret $sortKey in order to do a merge-sort.&lt;/p&gt;</description>
                <environment></environment>
        <key id="482371">DOCS-11206</key>
            <summary>Docs for SERVER-1981: Support $near and $nearSphere predicates on sharded 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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="kay.kim@mongodb.com">Kay Kim</reporter>
                        <labels>
                    </labels>
                <created>Fri, 12 Jan 2018 17:58:18 +0000</created>
                <updated>Sun, 29 Oct 2023 13:58:31 +0000</updated>
                            <resolved>Wed, 9 May 2018 15:58:56 +0000</resolved>
                                                    <fixVersion>3.7.1</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1871601" author="xgen-internal-githook" created="Mon, 23 Apr 2018 17:10:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;, &apos;name&apos;: &apos;kay&apos;}
&lt;p&gt;Message: DOCS-11389, &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11206&quot; title=&quot;Docs for SERVER-1981: Support $near and $nearSphere predicates on sharded collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11206&quot;&gt;&lt;del&gt;DOCS-11206&lt;/del&gt;&lt;/a&gt;: deprecate geoNear cmd, add sharded collection support to $near and $nearSphere&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/13e098768d8682f8c8093c12029cca858188d565&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/13e098768d8682f8c8093c12029cca858188d565&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="13443">SERVER-1981</issuekey>
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