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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-67517] [CQF] Queries with field path references fail if they contain a dot, dollar, or empty field</title>
                <link>https://jira.mongodb.org/browse/SERVER-67517</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This bug is relevant only for CQF/bonsai. Since the ABT translation layer relies on FieldPath (e.g. &lt;a href=&quot;https://github.com/10gen/mongo/blob/ddff02d34d8a9b2a999267e5c94dcc405eb7fc42/src/mongo/db/pipeline/abt/match_expression_visitor.cpp#L479&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;), the restrictions on field names are different than the existing find/agg systems. &lt;/p&gt;

&lt;p&gt;As an example, the following query should work:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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-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;assert.commandWorked(coll.insert({a: {$b: 1}}));&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;assert.eq(1, coll.find({&quot;a.$b&quot;: 1}).itcount());&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;But instead throws with &quot;&quot;FieldPath field names may not start with &apos;$&apos;. Consider using $getField or $setField.&quot;&lt;/p&gt;

&lt;p&gt;At least two relevant JS tests are &lt;a href=&quot;https://github.com/10gen/mongo/blob/master/jstests/core/field_name_empty.js&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;field_name_empty.js&lt;/a&gt; and &lt;a href=&quot;https://github.com/10gen/mongo/blob/master/jstests/core/field_name_validation.js&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;field_name_validation.js&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2076224">SERVER-67517</key>
            <summary>[CQF] Queries with field path references fail if they contain a dot, dollar, or empty field</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="nicholas.zolnierz@mongodb.com">Nicholas Zolnierz</assignee>
                                    <reporter username="nicholas.zolnierz@mongodb.com">Nicholas Zolnierz</reporter>
                        <labels>
                    </labels>
                <created>Fri, 24 Jun 2022 15:30:55 +0000</created>
                <updated>Sun, 29 Oct 2023 21:36:27 +0000</updated>
                            <resolved>Tue, 1 Nov 2022 12:52:53 +0000</resolved>
                                                    <fixVersion>6.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="4942012" author="xgen-internal-githook" created="Mon, 31 Oct 2022 20:08:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Nicholas Zolnierz&apos;, &apos;email&apos;: &apos;nicholas.zolnierz@mongodb.com&apos;, &apos;username&apos;: &apos;nzolnierzmdb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-67517&quot; title=&quot;[CQF] Queries with field path references fail if they contain a dot, dollar, or empty field&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-67517&quot;&gt;&lt;del&gt;SERVER-67517&lt;/del&gt;&lt;/a&gt; &lt;span class=&quot;error&quot;&gt;&amp;#91;CQF&amp;#93;&lt;/span&gt; Support field path references with dots, dollars, and empty&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2c45df846c8cf7b02f845e0d0ede0aef059cf60e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2c45df846c8cf7b02f845e0d0ede0aef059cf60e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4763892" author="hana.pearlman" created="Fri, 19 Aug 2022 16:49:33 +0000"  >&lt;p&gt;Moving back to open with Steve transitioning off the project. &lt;/p&gt;</comment>
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