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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-53979] Build simple end-to-end window function stage execution</title>
                <link>https://jira.mongodb.org/browse/SERVER-53979</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The primary goal of this ticket is to provide an extremely limited proof of concept for the window function stage. The only supported function will be $sum over the window bounds &lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;unbounded&amp;quot;, &amp;quot;current&amp;quot;&amp;#93;&lt;/span&gt;, as this allows us to completely re-use the existing AccumulatorState machinery. Also, partitioning will not need to be supported.&lt;/p&gt;

&lt;p&gt;The subtasks we identified would be:&lt;/p&gt;

&lt;p&gt;1. Translate AST-like structures to relevant AccumulatorState (dependency on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53399&quot; title=&quot;Implement registration and basic parsing/serializing mechanism for window functions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53399&quot;&gt;&lt;del&gt;SERVER-53399&lt;/del&gt;&lt;/a&gt;)&lt;br/&gt;
2. Fail to parse on anything other than the function/window described above.&lt;br/&gt;
3. Implement stage getNext() logic to loop through &apos;output&apos; fields, accumulate value, and project to the output document. May be able to use MutableDocument::setNestedField instead of the full-blown $addFields executor.&lt;br/&gt;
4. Verify functionality through mqlrun&lt;/p&gt;</description>
                <environment></environment>
        <key id="1597959">SERVER-53979</key>
            <summary>Build simple end-to-end window function stage execution</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="ted.tuckman@mongodb.com">Ted Tuckman</assignee>
                                    <reporter username="nicholas.zolnierz@mongodb.com">Nicholas Zolnierz</reporter>
                        <labels>
                    </labels>
                <created>Fri, 22 Jan 2021 19:14:26 +0000</created>
                <updated>Sun, 29 Oct 2023 21:58:32 +0000</updated>
                            <resolved>Tue, 9 Feb 2021 13:27:24 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="3606463" author="xgen-internal-githook" created="Tue, 9 Feb 2021 13:21:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ted Tuckman&apos;, &apos;email&apos;: &apos;ted.tuckman@mongodb.com&apos;, &apos;username&apos;: &apos;TedTuckman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53979&quot; title=&quot;Build simple end-to-end window function stage execution&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53979&quot;&gt;&lt;del&gt;SERVER-53979&lt;/del&gt;&lt;/a&gt; Add sum accumulator to window function stage&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ea12e9bed79e735518f20541ae765ff8b693517b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ea12e9bed79e735518f20541ae765ff8b693517b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3606462" author="xgen-internal-githook" created="Tue, 9 Feb 2021 13:21:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ted Tuckman&apos;, &apos;email&apos;: &apos;ted.tuckman@mongodb.com&apos;, &apos;username&apos;: &apos;TedTuckman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53979&quot; title=&quot;Build simple end-to-end window function stage execution&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53979&quot;&gt;&lt;del&gt;SERVER-53979&lt;/del&gt;&lt;/a&gt; Add sum accumulator to window function stage&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/40261a11d1a3fcb23973582d3e09fa79ec107770&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/40261a11d1a3fcb23973582d3e09fa79ec107770&lt;/a&gt;&lt;/p&gt;</comment>
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