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    <title>MongoDB Jira</title>
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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-15571] Make a command to copy a collection locally, then have db.collection.copyTo use it.</title>
                <link>https://jira.mongodb.org/browse/SERVER-15571</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Right now, db.collection.copyTo is implemented in as a shell helper which runs a server side javascript method. This serverside feature is nice, since it eliminates network hops to and from the client for each document.  However, this implementation suffers the problem using &lt;tt&gt;eval()&lt;/tt&gt;, which in any situation with auth enabled, requires permissions that we actively advise not giving anybody.&lt;/p&gt;

&lt;p&gt;Instead, what if there was a proper command on the server for this? We have several options for copying from another host, so it would seem to fit in. Once it exists, copyTo could be reimplemented to call the command, without the need for eval.&lt;/p&gt;</description>
                <environment></environment>
        <key id="162666">SERVER-15571</key>
            <summary>Make a command to copy a collection locally, then have db.collection.copyTo use it.</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="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-execution">Backlog - Query Execution</assignee>
                                    <reporter username="rod.adams@mongodb.com">Rod Adams</reporter>
                        <labels>
                    </labels>
                <created>Wed, 8 Oct 2014 20:08:45 +0000</created>
                <updated>Tue, 6 Dec 2022 05:00:31 +0000</updated>
                                                                            <component>Usability</component>
                                        <votes>0</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="1937131" author="sara.golemon" created="Mon, 2 Jul 2018 19:48:20 +0000"  >&lt;p&gt;Additionally, the {renameCollection:...} command (which aggregate $out uses internally to make the collection creation appear atomic, would precisely serve the purpose&#160;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rod.adams&quot; class=&quot;user-hover&quot; rel=&quot;rod.adams&quot;&gt;rod.adams&lt;/a&gt;&#160;described including being able to work across databases (which neither the agg pipeline nor collection.copyTo() currently support.&lt;/p&gt;

&lt;p&gt;There is still possibly a use case for a copyCollection which works across databases, or possibly: {renameCollection: ..., dropSource: false} if one were to piggy-back on the existing command.&#160; Or perhaps optimizing the case in cloneCollection where the from server is ourselves.&lt;/p&gt;</comment>
                            <comment id="1531300" author="asya" created="Thu, 23 Mar 2017 14:42:01 +0000"  >&lt;p&gt;Within the same DB (which is all copyTo can do, I believe) we have aggregation with &quot;$out&quot; stage.&lt;/p&gt;</comment>
                            <comment id="1203886" author="rod.adams" created="Tue, 15 Mar 2016 15:27:50 +0000"  >&lt;p&gt;I don&apos;t believe it does. The case I&apos;m talking about is more often someone wanting to move a collection from one database to another, within the same server. I could see cloneCollection work, if it was allowed to rename the collection, and had a &quot;local&quot; backdoor which could be made much faster.&lt;/p&gt;</comment>
                            <comment id="1195679" author="adam.midvidy" created="Mon, 7 Mar 2016 21:48:24 +0000"  >&lt;p&gt;Does cloneCollection (&lt;a href=&quot;https://docs.mongodb.org/manual/reference/command/cloneCollection/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.org/manual/reference/command/cloneCollection/&lt;/a&gt;) serve your use case?&lt;/p&gt;</comment>
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            <issuekey id="11478">SERVER-732</issuekey>
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            <issuekey id="187672">SERVER-17478</issuekey>
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