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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>
    </build-info>


<item>
            <title>[DOCS-14779] Investigate changes in SERVER-58604: Allow $geoNear &apos;near&apos; argument to be a let variable</title>
                <link>https://jira.mongodb.org/browse/DOCS-14779</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #c2d2c2;&quot;&gt;
&lt;p&gt;    The aggregation stage $geoNear now allows the &apos;near&apos; argument to be a let variable (previously only a constant was allowed).&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    Currently, &apos;near&apos; has to be a literal array (or GeoJSON object):&lt;/p&gt;

&lt;p&gt;&amp;gt; db.c.aggregate([ {$geoNear: {near: &lt;span class=&quot;error&quot;&gt;&amp;#91;0, 0&amp;#93;&lt;/span&gt;}} ]&lt;/p&gt;

&lt;p&gt;Instead we should allow it to be an expression:&lt;/p&gt;

&lt;p&gt;&amp;gt; db.c.aggregate([ {$geoNear: {near: &quot;$$pt&quot;}} ], {let: {pt: &lt;span class=&quot;error&quot;&gt;&amp;#91;0, 0&amp;#93;&lt;/span&gt;}})&lt;/p&gt;

&lt;p&gt;It doesn&apos;t make sense to allow the query point to vary per-document, so it has to be a constant expression.&lt;/p&gt;

&lt;p&gt;We also want to allow &apos;near&apos; to be bound in a $lookup:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{$lookup: {&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;&#160; from: &apos;coll&apos;,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&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;&#160; as: &apos;docs&apos;,&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;  let: {pt: &quot;$location&quot;},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  pipeline: [&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    {$geoNear: {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&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;      near: &quot;$$pt&quot;,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&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;      ...&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
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			&lt;/td&gt;
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&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;The expression &quot;$$pt&quot; is constant within each subquery.&lt;/p&gt;

&lt;p&gt;To make this work I think we&apos;ll want to:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Change the DocumentSourceGeoNear parser to accept any expression, for &apos;near&apos;.&lt;/li&gt;
	&lt;li&gt;Change DocumentSourceGeoNear::optimize to optimize the expression.&lt;/li&gt;
	&lt;li&gt;When we convert DocumentSourceGeoNear to DocumentSourceGeoNearCursor, raise an error if the expression is not a constant.&lt;/li&gt;
&lt;/ul&gt;


</description>
                <environment></environment>
        <key id="1867953">DOCS-14779</key>
            <summary>Investigate changes in SERVER-58604: Allow $geoNear &apos;near&apos; argument to be a let variable</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="ian.fogelman@mongodb.com">Ian Fogelman</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Mon, 6 Sep 2021 12:12:35 +0000</created>
                <updated>Mon, 13 Nov 2023 17:49:41 +0000</updated>
                            <resolved>Fri, 5 Nov 2021 18:03:21 +0000</resolved>
                                                    <fixVersion>5.1.0-rc0</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4172237" author="xgen-internal-githook" created="Fri, 5 Nov 2021 17:49:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;ianf-mongodb&apos;, &apos;email&apos;: &apos;85948430+ianf-mongodb@users.noreply.github.com&apos;, &apos;username&apos;: &apos;ianf-mongodb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14779&quot; title=&quot;Investigate changes in SERVER-58604: Allow $geoNear &amp;#39;near&amp;#39; argument to be a let variable&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14779&quot;&gt;&lt;del&gt;DOCS-14779&lt;/del&gt;&lt;/a&gt; Add context around 5.1 let usage in geoNear (#6073)&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14779&quot; title=&quot;Investigate changes in SERVER-58604: Allow $geoNear &amp;#39;near&amp;#39; argument to be a let variable&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14779&quot;&gt;&lt;del&gt;DOCS-14779&lt;/del&gt;&lt;/a&gt; Add context around 5.1 let usage in geoNear&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;Update source/reference/operator/aggregation/geoNear.txt&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Co-authored-by: jeff-allen-mongo &amp;lt;jeffrey.allen@10gen.com&amp;gt;&lt;/p&gt;

&lt;p&gt;Co-authored-by: jeff-allen-mongo &amp;lt;jeffrey.allen@10gen.com&amp;gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/911c14d979bb2551dbd3b8f8451b5df80e623a50&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/911c14d979bb2551dbd3b8f8451b5df80e623a50&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4041174" author="dbeng-pm-bot" created="Mon, 6 Sep 2021 12:12:43 +0000"  >&lt;p&gt;&lt;em&gt;Downstream changes updated for upstream &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58604&quot; title=&quot;Allow $geoNear &amp;#39;near&amp;#39; argument to be a let variable&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58604&quot;&gt;&lt;del&gt;SERVER-58604&lt;/del&gt;&lt;/a&gt;:&lt;/em&gt; &lt;br/&gt;
The aggregation stage $geoNear now allows the &apos;near&apos; argument to be a let variable (previously only a constant was allowed).&lt;/p&gt;</comment>
                    </comments>
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