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    <title>MongoDB Jira</title>
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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-85011] POC WindowManager class and interface</title>
                <link>https://jira.mongodb.org/browse/SERVER-85011</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The idea with the WindowManager is to act as a middle-man between the aggregation stage (which receives documents and outputs documents) and the window functions (which accumulate values, potentially remove, and return a computed result). &lt;/p&gt;

&lt;p&gt;Some concepts that would be worth hashing out:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;How will the stage logic interact with the WindowManager? Or vice versa?
	&lt;ul&gt;
		&lt;li&gt;Likewise, who is responsible for driving the pulling of the next document in the pipeline?&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;Can we assume that all docs in a partition will be buffered?&lt;/li&gt;
	&lt;li&gt;What sort of state is shared across the different WindowManagers and what is unique?&lt;/li&gt;
	&lt;li&gt;When the stage detects a new partition, what is the exact sequence of events to populate the remaining documents? This piece will likely require logic in both the stage and the window manager&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="1570618">SERVER-85011</key>
            <summary>POC WindowManager class and interface</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="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="nicholas.zolnierz@mongodb.com">Nicholas Zolnierz</reporter>
                        <labels>
                            <label>wf-m1</label>
                    </labels>
                <created>Wed, 16 Dec 2020 20:22:15 +0000</created>
                <updated>Sat, 13 Jan 2024 01:03:06 +0000</updated>
                            <resolved>Thu, 14 Jan 2021 20:19:30 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3565837" author="nicholas.zolnierz" created="Thu, 14 Jan 2021 20:19:30 +0000"  >&lt;p&gt;Closing this as there&apos;s now a server ticket tracking the work.&lt;/p&gt;</comment>
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