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    <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-41750] Refactor renamedPaths() helpers to support renames in either direction</title>
                <link>https://jira.mongodb.org/browse/SERVER-41750</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;During development of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5477&quot; title=&quot;when sharded, no need to merge groups if $group _id is the shard key or original document _id&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5477&quot;&gt;SERVER-5477&lt;/a&gt; we realized that we have many of the utilities necessary to track whether the shard key is preserved throughout the pipeline up until the first $group, but these helpers we developed to work backwards through a pipeline (for use in $merge optimizations). &lt;/p&gt;

&lt;p&gt;We should add a library that can compute the new names of fields in either direction. It should be able to answer both:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Given the paths which represent the shard key &lt;em&gt;before&lt;/em&gt; this stage, where are the values that represent the shard key &lt;em&gt;after&lt;/em&gt; this stage&apos;s transformation takes effect?&lt;/li&gt;
	&lt;li&gt;Given the paths which represent the shard key &lt;em&gt;after&lt;/em&gt; this stage, where are the values that represent the shard key &lt;em&gt;before&lt;/em&gt; this stage&apos;s transformation takes effect?&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="803249">SERVER-41750</key>
            <summary>Refactor renamedPaths() helpers to support renames in either direction</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="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="george.wangensteen@mongodb.com">George Wangensteen</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                    </labels>
                <created>Fri, 14 Jun 2019 16:26:47 +0000</created>
                <updated>Sun, 29 Oct 2023 22:19:54 +0000</updated>
                            <resolved>Fri, 28 Jun 2019 20:22:20 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2305358" author="xgen-internal-githook" created="Fri, 28 Jun 2019 20:17:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;George Wangensteen&apos;, &apos;email&apos;: &apos;george.wangensteen@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-41750&quot; title=&quot;Refactor renamedPaths() helpers to support renames in either direction&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-41750&quot;&gt;&lt;del&gt;SERVER-41750&lt;/del&gt;&lt;/a&gt; refactor renamed paths API.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b651ed3dc6ae61332bb3193afef1cfa41bf5df53&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b651ed3dc6ae61332bb3193afef1cfa41bf5df53&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="35285">SERVER-5477</issuekey>
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