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    <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>[CDRIVER-2998] Refactor _has_out_key to only inspect last pipeline stage</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-2998</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;&lt;tt&gt;_has_out_key()&lt;/tt&gt; currently returns &lt;tt&gt;true&lt;/tt&gt; if any pipeline stage is &lt;tt&gt;$out&lt;/tt&gt;. Since &lt;tt&gt;$out&lt;/tt&gt; can only be used in the last position (server will error otherwise), we can optimize this function to only inspect the final stage.&lt;/p&gt;

&lt;p&gt;There should be no negative effects to this change. If &lt;tt&gt;$out&lt;/tt&gt; is used in the middle of a pipeline, libmongoc would then decide not to inherit a write concern and the server would ultimately return an error for a malformed pipeline.&lt;/p&gt;</description>
                <environment></environment>
        <key id="712339">CDRIVER-2998</key>
            <summary>Refactor _has_out_key to only inspect last pipeline stage</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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>
                            <label>neweng</label>
                    </labels>
                <created>Thu, 7 Mar 2019 15:20:32 +0000</created>
                <updated>Sat, 28 Oct 2023 11:29:22 +0000</updated>
                            <resolved>Tue, 20 Aug 2019 15:32:14 +0000</resolved>
                                                    <fixVersion>1.16.0</fixVersion>
                                    <component>libmongoc</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2379131" author="xgen-internal-githook" created="Tue, 20 Aug 2019 15:30:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;isabelatkinson&apos;, &apos;email&apos;: &apos;isabelatkinson@gmail.com&apos;, &apos;name&apos;: &apos;isabelatkinson&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-2998&quot; title=&quot;Refactor _has_out_key to only inspect last pipeline stage&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-2998&quot;&gt;&lt;del&gt;CDRIVER-2998&lt;/del&gt;&lt;/a&gt; Refactor _has_write_key to inspect last stage only&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/d1b0c631d340a45ba1a5d07dd4e3cfab8e5ecca4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/d1b0c631d340a45ba1a5d07dd4e3cfab8e5ecca4&lt;/a&gt;&lt;/p&gt;</comment>
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