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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>[CDRIVER-2994] Note users must advance cursor returned by aggregate helper to execute pipeline</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-2994</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;This is something I realized while implementing the db-level aggregate helper in &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-2899&quot; title=&quot;Add a database aggregate helper&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-2899&quot;&gt;&lt;del&gt;CDRIVER-2899&lt;/del&gt;&lt;/a&gt;. The current documentation leads users to believe that the pipeline is executed by the helper itself, which is not correct since the returned command cursor is lazy. This is especially pertinent for piplines using an &lt;tt&gt;$out&lt;/tt&gt; stage, as there is typically no reason to advance the cursor (no results are ever returned).&lt;/p&gt;

&lt;p&gt;I intend to update the doc blocks for both the db and collection helpers as part of &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-2899&quot; title=&quot;Add a database aggregate helper&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-2899&quot;&gt;&lt;del&gt;CDRIVER-2899&lt;/del&gt;&lt;/a&gt;, but this issue can be used to revise &lt;tt&gt;mongoc_collection_aggregate.rst&lt;/tt&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="710692">CDRIVER-2994</key>
            <summary>Note users must advance cursor returned by aggregate helper to execute pipeline</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="isabel.atkinson@mongodb.com">Isabel Atkinson</assignee>
                                    <reporter username="jmikola@mongodb.com">Jeremy Mikola</reporter>
                        <labels>
                    </labels>
                <created>Wed, 6 Mar 2019 15:40:04 +0000</created>
                <updated>Sat, 28 Oct 2023 11:29:23 +0000</updated>
                            <resolved>Mon, 5 Aug 2019 14:09:22 +0000</resolved>
                                                    <fixVersion>1.15.0</fixVersion>
                                    <component>docs</component>
                    <component>libmongoc</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2359551" author="xgen-internal-githook" created="Tue, 6 Aug 2019 14:50:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;isabelatkinson&apos;, &apos;username&apos;: &apos;isabelatkinson&apos;, &apos;email&apos;: &apos;isabel.atkinson@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-2994&quot; title=&quot;Note users must advance cursor returned by aggregate helper to execute pipeline&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-2994&quot;&gt;&lt;del&gt;CDRIVER-2994&lt;/del&gt;&lt;/a&gt; update aggregate doc to note user must advance cursor&lt;br/&gt;
Branch: cdriver-2873&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/f82e4415aee149e49c1e501d64cddc3113c1a89e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/f82e4415aee149e49c1e501d64cddc3113c1a89e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2357637" author="xgen-internal-githook" created="Mon, 5 Aug 2019 14:07:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;isabelatkinson&apos;, &apos;username&apos;: &apos;isabelatkinson&apos;, &apos;email&apos;: &apos;isabel.atkinson@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-2994&quot; title=&quot;Note users must advance cursor returned by aggregate helper to execute pipeline&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-2994&quot;&gt;&lt;del&gt;CDRIVER-2994&lt;/del&gt;&lt;/a&gt; update aggregate doc to note user must advance cursor&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/f82e4415aee149e49c1e501d64cddc3113c1a89e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/f82e4415aee149e49c1e501d64cddc3113c1a89e&lt;/a&gt;&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is related to">
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            <issuekey id="647701">CDRIVER-2899</issuekey>
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