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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>
    </build-info>


<item>
            <title>[COMPASS-3803] aggregation pipeline builder does not support operators in &quot;$eq&quot;</title>
                <link>https://jira.mongodb.org/browse/COMPASS-3803</link>
                <project id="13182" key="COMPASS">Compass </project>
                    <description>&lt;p&gt;Hi,&lt;/p&gt;

&lt;p&gt;In mongo shell, the following aggregation pipeline works as expected: it finds all documents of which the string length of the value of the &quot;un&quot; field is 25.&lt;/p&gt;
&lt;p/&gt;
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&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;
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						&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;db.configusers.aggregate([{&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;   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;    &quot;$match&quot;: {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        &quot;$expr&quot;: {&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;   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;            &quot;$eq&quot;: [&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;                {&apos;$strLenCP&apos;: &quot;$un&quot;}, 25 ]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;However, I use this in Compass 1.18, it will report &lt;tt&gt;Field must not begin with &apos;$&apos; or &apos;.&apos;, field path was: $strLenCP&lt;/tt&gt;:&lt;br/&gt;
&lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;226423_thumb&quot; href=&quot;https://jira.mongodb.org/secure/attachment/226423/226423_error.png&quot; title=&quot;error.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;226423&quot; file-preview-title=&quot;error.png&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/thumbnail/226423/_thumb_226423.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;Similarly, other operators such as &lt;tt&gt;$abs&lt;/tt&gt;, &lt;tt&gt;$trim&lt;/tt&gt; are not supported as well.&lt;/p&gt;

&lt;p&gt;Could you please confirm if this is expected and if there is a plan to support operators in such use cases?&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Lungang&lt;/p&gt;
</description>
                <environment></environment>
        <key id="885763">COMPASS-3803</key>
            <summary>aggregation pipeline builder does not support operators in &quot;$eq&quot;</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="lungang.fang@mongodb.com">Lungang Fang</reporter>
                        <labels>
                    </labels>
                <created>Wed, 7 Aug 2019 01:33:36 +0000</created>
                <updated>Wed, 14 Aug 2019 14:24:12 +0000</updated>
                            <resolved>Wed, 14 Aug 2019 14:24:12 +0000</resolved>
                                    <version>1.18.0</version>
                                                    <component>Aggregation pipeline</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2370637" author="massimiliano.marcon" created="Wed, 14 Aug 2019 14:24:12 +0000"  >&lt;p&gt;Watch &lt;a href=&quot;https://jira.mongodb.org/browse/COMPASS-3805&quot; title=&quot;Aggregate match step with $strLenCP doesn&amp;#39;t work&quot; class=&quot;issue-link&quot; data-issue-key=&quot;COMPASS-3805&quot;&gt;&lt;del&gt;COMPASS-3805&lt;/del&gt;&lt;/a&gt; for updates on this fix.&lt;/p&gt;</comment>
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                            <issuelinktype id="10010">
                    <name>Duplicate</name>
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                                        <issuelink>
            <issuekey id="887237">COMPASS-3805</issuekey>
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                            <attachment id="226423" name="error.png" size="23011" author="lungang.fang@mongodb.com" created="Wed, 7 Aug 2019 01:29:51 +0000"/>
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