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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-53896] positional $ operator when there are two array path in query</title>
                <link>https://jira.mongodb.org/browse/SERVER-53896</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;having following document:&lt;/p&gt;
&lt;p/&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;   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;&#160; &quot;grades&quot;: [&lt;/span&gt;&lt;/pre&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;   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;&#160; &#160; {&quot;grade&quot;: 90, &quot;mean&quot;: 85,&#160;&quot;std&quot;: 50}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
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&lt;p/&gt;
&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;this query:&lt;/p&gt;

&lt;p/&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;   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;&#160; { user: 1, &quot;grades.grade&quot;: 85 },&lt;/span&gt;&lt;/pre&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;   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;&#160; { $set: { &quot;grades.$.std&quot; : 6 } }&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;
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&lt;p/&gt;
&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;update first element in grades instead of second one.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1594601">SERVER-53896</key>
            <summary>positional $ operator when there are two array path in query</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="charlie.swanson@mongodb.com">Charlie Swanson</assignee>
                                    <reporter username="rahbari@gmail.com">Ali Rahbari</reporter>
                        <labels>
                    </labels>
                <created>Wed, 20 Jan 2021 06:30:16 +0000</created>
                <updated>Thu, 4 Mar 2021 18:38:29 +0000</updated>
                            <resolved>Tue, 9 Feb 2021 13:32:07 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3606481" author="charlie.swanson" created="Tue, 9 Feb 2021 13:32:07 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rahbari%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;rahbari@gmail.com&quot;&gt;rahbari@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for the report. This is indeed strange and unhelpful behavior. I think that this problem is already described and tracked in&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-18500&quot; title=&quot;Resolve ambiguity of positional projections with multiple implicit array traversal predicates in certain cases&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-18500&quot;&gt;SERVER-18500&lt;/a&gt;. I&apos;m resolving this ticket as a duplicate of that one, but please let me know if it doesn&apos;t look like the same thing to you.&#160;&lt;/p&gt;</comment>
                            <comment id="3578653" author="JIRAUSER1257066" created="Fri, 22 Jan 2021 20:43:03 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=rahbari%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;rahbari@gmail.com&quot;&gt;rahbari@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for your bug report. The issue seems to happen when &lt;a href=&quot;https://docs.mongodb.com/manual/tutorial/query-arrays/#query-an-array-for-an-element&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;querying an array for an element&lt;/a&gt; then using $set and $pull with the positional operator. $pull with the positional operator works as intended when the document contains &lt;tt&gt;user: 1&lt;/tt&gt; instead of &lt;tt&gt;user: &lt;span class=&quot;error&quot;&gt;&amp;#91;1&amp;#93;&lt;/span&gt;&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;However, since the document is queried by both &lt;tt&gt;user&lt;/tt&gt; and &lt;tt&gt;grades.grade&lt;/tt&gt;, I would expect the positional operator to preserve the match made by the &lt;tt&gt;grades.grade&lt;/tt&gt; field.&lt;/p&gt;

&lt;p&gt;Best,&lt;br/&gt;
Edwin&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="204578">SERVER-18500</issuekey>
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            <issuekey id="1639849">DOCS-14267</issuekey>
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