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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-27517] $lookup into a pipeline</title>
                <link>https://jira.mongodb.org/browse/SERVER-27517</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I have been trying to limit lookup, i.e. limit lookup to check only first 1000 documents from joined collection, it fails.&lt;br/&gt;
Also i do not want to use $out separately as i am using it to create a report which needs one line query.&lt;br/&gt;
Is there any way i can do it?? &lt;/p&gt;</description>
                <environment></environment>
        <key id="341142">SERVER-27517</key>
            <summary>$lookup into a pipeline</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="tishakariya@gmail.com">tisha Kariya</reporter>
                        <labels>
                    </labels>
                <created>Tue, 27 Dec 2016 12:05:13 +0000</created>
                <updated>Tue, 6 Dec 2022 04:08:52 +0000</updated>
                            <resolved>Mon, 27 Nov 2017 13:39:16 +0000</resolved>
                                    <version>3.2.8</version>
                    <version>3.4.0</version>
                                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="2238209" author="tishakariya@gmail.com" created="Wed, 8 May 2019 07:19:22 +0000"  >&lt;p&gt;Thanks James&lt;/p&gt;</comment>
                            <comment id="1734828" author="james.wahlin@10gen.com" created="Mon, 27 Nov 2017 13:38:51 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=tishakariya%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;tishakariya@gmail.com&quot;&gt;tishakariya@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;$lookup into a sub-pipeline has been implemented and will be available in our upcoming MongoDB 3.6 release. It is &lt;a href=&quot;https://www.mongodb.com/download-center#development&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;currently available for testing&lt;/a&gt; as part of our 3.6 release candidates.&lt;/p&gt;

&lt;p&gt;Given this, we will close this ticket as a duplicate of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29072&quot; title=&quot;Add support for $lookup into a sub-pipeline&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29072&quot;&gt;&lt;del&gt;SERVER-29072&lt;/del&gt;&lt;/a&gt; which delivered this feature.&lt;/p&gt;

&lt;p&gt;As for your additional question:&lt;/p&gt;
&lt;blockquote&gt;
&lt;p&gt;Also i do not want to use $out separately as i am using it to create a report which needs one line query.&lt;br/&gt;
Is there any way i can do it??&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;If you still have a question related to $out, please open a new ticket and provide a detailed example of what you are looking to accomplish.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
James&lt;/p&gt;</comment>
                            <comment id="1465552" author="david.storch" created="Tue, 27 Dec 2016 19:51:56 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=tishakariya%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;tishakariya@gmail.com&quot;&gt;tishakariya@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;This is being sent to the Query Team for triage.&lt;/p&gt;

&lt;p&gt;As my colleague &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kyle.suarez&quot; class=&quot;user-hover&quot; rel=&quot;kyle.suarez&quot;&gt;kyle.suarez&lt;/a&gt; mentioned, you can accomplish this using &lt;a href=&quot;https://docs.mongodb.com/manual/release-notes/3.4/#views&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;read-only non-materialized views&lt;/a&gt; starting in MongoDB 3.4. However, adding the ability to explicitly lookup into a pipeline is an interesting feature request in its own right. Please continue to watch this ticket for updates.&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Dave&lt;/p&gt;</comment>
                            <comment id="1465296" author="kyle.suarez" created="Tue, 27 Dec 2016 14:58:34 +0000"  >&lt;p&gt;In MongoDB 3.4+, you can create a view on the collection to look up from and apply a limit:&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;db.createView(&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;view&quot;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;collectionToLookUpFrom&quot;&lt;/span&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;, [ { $limit: 1000 } ]);&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;db.collection.aggregate( [ { $lookup: { from: &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;view&quot;&lt;/span&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;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Not sure about earlier versions, though.&lt;/p&gt;</comment>
                    </comments>
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                                        <issuelink>
            <issuekey id="380695">SERVER-29072</issuekey>
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            <issuekey id="337979">SERVER-27372</issuekey>
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