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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-10165] Change aggregate shell helper to return cursor.</title>
                <link>https://jira.mongodb.org/browse/SERVER-10165</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If connected to a server that doesn&apos;t support agg cursors, fallback to non-cursor form and return a simulated cursor.&lt;/p&gt;

&lt;p&gt;Most of the work here will involve updating the tests to work with the new API.&lt;/p&gt;</description>
                <environment></environment>
        <key id="81872">SERVER-10165</key>
            <summary>Change aggregate shell helper to return cursor.</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="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="mathias@mongodb.com">Mathias Stearn</reporter>
                        <labels>
                    </labels>
                <created>Wed, 10 Jul 2013 19:52:22 +0000</created>
                <updated>Fri, 22 Nov 2013 23:48:39 +0000</updated>
                            <resolved>Tue, 8 Oct 2013 21:53:59 +0000</resolved>
                                                    <fixVersion>2.5.3</fixVersion>
                                    <component>Aggregation Framework</component>
                    <component>Shell</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="437715" author="auto" created="Tue, 8 Oct 2013 21:45:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-10165&quot; title=&quot;Change aggregate shell helper to return cursor.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-10165&quot;&gt;&lt;del&gt;SERVER-10165&lt;/del&gt;&lt;/a&gt; aggregate() shell helper now returns a cursor&lt;/p&gt;

&lt;p&gt;The actual change is in src/mongo/shell/collection.js with the remaining changes&lt;br/&gt;
to adjust tests to the new api.&lt;/p&gt;

&lt;p&gt;The &quot;ideal&quot; arguments are now an array of pipeline ops and an optional object&lt;br/&gt;
with extra top-level options for the command (such as &lt;/p&gt;
{explain: true}
&lt;p&gt;. For&lt;br/&gt;
backwards compatibility, we still support the varargs style where each argument&lt;br/&gt;
is a pipeline stage, but there is no way to specify extra parameters in this&lt;br/&gt;
mode.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/061a086641a2638d73884ad573eaea2a3ab8459f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/061a086641a2638d73884ad573eaea2a3ab8459f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="427392" author="dan@10gen.com" created="Tue, 17 Sep 2013 20:25:59 +0000"  >&lt;p&gt;I think we should make a hard break of backwards compatibility here.  2.6+ will always return a cursor.  If you want to use a 2.6+ shell without a cursor, the workaround is to not use the helper in the shell and not pass the cursor.&lt;/p&gt;

&lt;p&gt;Currently for the jstests that use the aggregate helper, it calls the cursor and non-cursor forms and asserts that the return values are the same.  For cursor specific tests, we use the explicit command form and pass the &quot;cursor&quot; param.&lt;/p&gt;</comment>
                            <comment id="378921" author="auto" created="Thu, 11 Jul 2013 14:51:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5932&quot; title=&quot;support cursor based aggregation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5932&quot;&gt;&lt;del&gt;SERVER-5932&lt;/del&gt;&lt;/a&gt; Aggregation returning a cursor&lt;/p&gt;

&lt;p&gt;related tickets:&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-8261&quot; title=&quot;system for commands to return cursors&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-8261&quot;&gt;&lt;del&gt;SERVER-8261&lt;/del&gt;&lt;/a&gt; System for commands to return cursors&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-10165&quot; title=&quot;Change aggregate shell helper to return cursor.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-10165&quot;&gt;&lt;del&gt;SERVER-10165&lt;/del&gt;&lt;/a&gt; aggregate() helper should return cursor&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a51f2688fa05672d999c997170847a3ee29a223b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a51f2688fa05672d999c997170847a3ee29a223b&lt;/a&gt;&lt;/p&gt;</comment>
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