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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>[CSHARP-4244] Support object comparison at root level in LINQ3</title>
                <link>https://jira.mongodb.org/browse/CSHARP-4244</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;Expressions like&#160;&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;
&lt;p&gt;&#160;should be supported.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2085734">CSHARP-4244</key>
            <summary>Support object comparison at root level in LINQ3</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="10300" iconUrl="https://jira.mongodb.org/images/icons/priorities/medium.svg">Unknown</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="robert@mongodb.com">Robert Stam</assignee>
                                    <reporter username="boris.dogadov@mongodb.com">Boris Dogadov</reporter>
                        <labels>
                    </labels>
                <created>Fri, 8 Jul 2022 14:31:03 +0000</created>
                <updated>Sat, 28 Oct 2023 11:47:09 +0000</updated>
                            <resolved>Tue, 1 Nov 2022 03:35:50 +0000</resolved>
                                                    <fixVersion>2.19.0</fixVersion>
                                    <component>LINQ3</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4950753" author="xgen-internal-githook" created="Thu, 3 Nov 2022 03:49:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rstam&apos;, &apos;email&apos;: &apos;robert@robertstam.org&apos;, &apos;username&apos;: &apos;rstam&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-4244&quot; title=&quot;Support object comparison at root level in LINQ3&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-4244&quot;&gt;&lt;del&gt;CSHARP-4244&lt;/del&gt;&lt;/a&gt;: Skip tests on older server versions due to server bugs.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/8f895935fc210944f34888294d93d4195908ffef&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/8f895935fc210944f34888294d93d4195908ffef&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4950327" author="rstam" created="Wed, 2 Nov 2022 23:00:22 +0000"  >&lt;p&gt;This feature currently only works on servers 6.0 and newer.&lt;/p&gt;

&lt;p&gt;The symptom on older server versions is an error message containing the phrase &quot;FieldPath::tail() called on single element path&quot;.&lt;/p&gt;

&lt;p&gt;See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71045&quot; title=&quot;Use of $$ROOT in $expr in $match fails on servers prior to 6.0&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71045&quot;&gt;&lt;del&gt;SERVER-71045&lt;/del&gt;&lt;/a&gt; to track the server issue if you intend to use this C# driver LINQ feature on older servers.&lt;/p&gt;</comment>
                            <comment id="4943110" author="xgen-internal-githook" created="Tue, 1 Nov 2022 03:34:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rstam&apos;, &apos;email&apos;: &apos;robert@robertstam.org&apos;, &apos;username&apos;: &apos;rstam&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-4244&quot; title=&quot;Support object comparison at root level in LINQ3&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-4244&quot;&gt;&lt;del&gt;CSHARP-4244&lt;/del&gt;&lt;/a&gt;: Support object comparison at root level in LINQ3.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/cdfbab2cd5a02bbd68d201675aed9a75aa7202b8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/cdfbab2cd5a02bbd68d201675aed9a75aa7202b8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4932776" author="rstam" created="Thu, 27 Oct 2022 16:45:43 +0000"  >&lt;p&gt;This ticket depends on the fix in &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-4369&quot; title=&quot;Incorrect translation of Group/Where/Select in LINQ3&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-4369&quot;&gt;&lt;del&gt;CSHARP-4369&lt;/del&gt;&lt;/a&gt; before it can be finished.&lt;/p&gt;</comment>
                            <comment id="4932770" author="rstam" created="Thu, 27 Oct 2022 16:44:34 +0000"  >&lt;p&gt;This looks like a valid LINQ query to me. It should translate to:&lt;/p&gt;


&lt;p/&gt;
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&lt;p/&gt;</comment>
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