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    <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-54907] Add translation logic for $derivative executor</title>
                <link>https://jira.mongodb.org/browse/SERVER-54907</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54233&quot; title=&quot;Implement $derivative accumulator-only class&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54233&quot;&gt;&lt;del&gt;SERVER-54233&lt;/del&gt;&lt;/a&gt; adds a new executor type for $derivative, but its not currently hooked up to the front end. The two main tasks for this ticket are to (1) register a $derivative parser and parse tree representation (window_function::Expression) and (2) build the new executor when appropriate. Then we should be able to write JS tests for the derivative function as well.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1638058">SERVER-54907</key>
            <summary>Add translation logic for $derivative executor</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="david.percy@mongodb.com">David Percy</assignee>
                                    <reporter username="nicholas.zolnierz@mongodb.com">Nicholas Zolnierz</reporter>
                        <labels>
                    </labels>
                <created>Wed, 3 Mar 2021 14:09:33 +0000</created>
                <updated>Sun, 29 Oct 2023 21:56:48 +0000</updated>
                            <resolved>Wed, 7 Apr 2021 01:47:42 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="3704499" author="xgen-internal-githook" created="Wed, 7 Apr 2021 00:50:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;David Percy&apos;, &apos;email&apos;: &apos;david.percy@mongodb.com&apos;, &apos;username&apos;: &apos;dpercy&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54907&quot; title=&quot;Add translation logic for $derivative executor&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54907&quot;&gt;&lt;del&gt;SERVER-54907&lt;/del&gt;&lt;/a&gt; Parse and translate $derivative window function&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/85fdfd2d8e3302f48efe2e179de39843ccf5c6e6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/85fdfd2d8e3302f48efe2e179de39843ccf5c6e6&lt;/a&gt;&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="1610361">SERVER-54245</issuekey>
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                            <issuelinktype id="10320">
                    <name>Documented</name>
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            <issuekey id="1672470">DOCS-14338</issuekey>
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                            <customfieldvalue>($derivative is new in 5.0 as part of the Window Functions project, so this is a breaking change only for internal users.)&lt;br/&gt;
&lt;br/&gt;
We made a small syntax change vs the Syntax doc: $derivative requires an explicit &amp;#39;window&amp;#39; argument.  Other window functions that accept a &amp;#39;window&amp;#39; default to [unbounded, unbounded], but we thought this might be confusing default for $derivative.</customfieldvalue>

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