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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DRIVERS-379] Is it important to know whether a cursor is tailable or not?</title>
                <link>https://jira.mongodb.org/browse/DRIVERS-379</link>
                <project id="10980" key="DRIVERS">Drivers</project>
                    <description>&lt;p&gt;The following question came up as part of a scoping discussion for the upcoming Notification API feature:  &lt;/p&gt;

&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;Do drivers need to do anything special to understand that the cursors coming&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;back from change notification aggregations are tailable?&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;Specifically: while it&apos;s important for us to distinguish a cursor&apos;s type when sending a request to the server, is it important to track that information after the cursor has been created? Are there cases where it is not good enough simply to track the presence of a non-zero cursor id on subsequent server replies? &lt;/p&gt;

&lt;p&gt;The question arises from the fact that a TAILABLE_AWAIT cursor will be implicitly created by the addition of the new `$changeNotification` stage in an agg query, which drivers will need to accommodate as such.  It is unclear whether the server should return some flag in the first response, giving the drivers a hint as to what type of cursor to create, or if we can just track the cursor id.&lt;/p&gt;</description>
                <environment></environment>
        <key id="373117">DRIVERS-379</key>
            <summary>Is it important to know whether a cursor is tailable or not?</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="9">Done</resolution>
                                        <assignee username="matt.broadstone@mongodb.com">Matt Broadstone</assignee>
                                    <reporter username="matt.broadstone@mongodb.com">Matt Broadstone</reporter>
                        <labels>
                    </labels>
                <created>Tue, 11 Apr 2017 20:26:59 +0000</created>
                <updated>Tue, 17 Mar 2020 02:28:18 +0000</updated>
                            <resolved>Sun, 4 Jun 2017 18:10:56 +0000</resolved>
                                                                            <votes>0</votes>
                                    <watches>6</watches>
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