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            <title>[SERVER-4436] Add support for tailable aggregation cursors</title>
                <link>https://jira.mongodb.org/browse/SERVER-4436</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When we eventually provide aggregation in a non-command form, we should support tailable cursors, provided there aren&apos;t grouping/sorting functions in the pipeline (because those would require seeing the entire input dataset).  As long as there aren&apos;t grouping operators, we can continue to provide results as find() does now.&lt;/p&gt;</description>
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        <key id="26051">SERVER-4436</key>
            <summary>Add support for tailable aggregation cursors</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="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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="dan@mongodb.com">Daniel Pasette</reporter>
                        <labels>
                            <label>usability</label>
                    </labels>
                <created>Tue, 6 Dec 2011 00:48:56 +0000</created>
                <updated>Tue, 6 Dec 2022 05:38:50 +0000</updated>
                            <resolved>Wed, 17 Jan 2018 20:26:58 +0000</resolved>
                                                                    <component>Aggregation Framework</component>
                                        <votes>1</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="156561" author="redbeard0531" created="Fri, 24 Aug 2012 20:41:19 +0000"  >&lt;p&gt;IIRC we only support tailable cursors on capped collections. That restriction would need to be lifted for this to be much use.&lt;/p&gt;</comment>
                            <comment id="98865" author="cwestin" created="Wed, 14 Mar 2012 21:31:01 +0000"  >&lt;p&gt;If the grouping key has an index on it, we can make that tailable as well, because we&apos;ll be able to stream the groups as we see them.&lt;/p&gt;</comment>
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