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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-16888] $ positional operator with $elemMatch doesn&apos;t work when multiple update critera supplied</title>
                <link>https://jira.mongodb.org/browse/SERVER-16888</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Consider:&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;
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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;   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;db.test.insert({array1: [&quot;a&quot;, &quot;b&quot;], array2:[{_id:1}, {_id:2}]})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
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&lt;p/&gt;

&lt;p&gt;Update with elemMatch:&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;
		&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;   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;db.test.update({array1: &quot;a&quot;, array2:{$elemMatch:{_id:2}}}, {$set {&quot;array2.$.flag&quot;:&quot;THIS ELEMENT WAS UPDATED&quot;}});&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;

&lt;p&gt;&lt;b&gt;Under 2.4&lt;/b&gt;&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;
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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;   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;{ &quot;_id&quot; : ObjectId(&quot;54b84eb0d9f8df727c34dda5&quot;), &quot;array1&quot; : [  &quot;a&quot;,  &quot;b&quot; ], &quot;array2&quot; : [  {  &quot;_id&quot; : 1 },  {  &quot;_id&quot; : 2,  &quot;flag&quot; : &quot;THIS ELEMENT WAS UPDATED&quot; } ] }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;&lt;b&gt;Under 2.8.0-RC4 and 2.6.6&lt;/b&gt;&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;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;   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;{ &quot;_id&quot; : ObjectId(&quot;54b84dfa0ed2d2cc8aa29721&quot;), &quot;array1&quot; : [ &quot;a&quot;, &quot;b&quot; ], &quot;array2&quot; : [ { &quot;_id&quot; : 1, &quot;flag&quot; : &quot;THIS ELEMENT WAS UPDATED&quot; }, { &quot;_id&quot; : 2 } ] }&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;Note how the wrong array member is updated in the 2.6/2.8 case.&lt;/p&gt;</description>
                <environment></environment>
        <key id="179070">SERVER-16888</key>
            <summary>$ positional operator with $elemMatch doesn&apos;t work when multiple update critera supplied</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="david.hows">David Hows</reporter>
                        <labels>
                            <label>regression</label>
                    </labels>
                <created>Thu, 15 Jan 2015 23:45:48 +0000</created>
                <updated>Tue, 26 Sep 2017 15:29:42 +0000</updated>
                            <resolved>Fri, 16 Jan 2015 01:04:49 +0000</resolved>
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                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="806056" author="rassi@10gen.com" created="Fri, 16 Jan 2015 01:04:49 +0000"  >&lt;p&gt;I am resolving this ticket as a dup of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-14662&quot; title=&quot;Positional projection queries (and positional update ops) should fail with error if multiple arrays encountered&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-14662&quot;&gt;&lt;del&gt;SERVER-14662&lt;/del&gt;&lt;/a&gt;, as it is &lt;a href=&quot;http://docs.mongodb.org/manual/reference/operator/projection/positional/#array-field-limitations&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;unspecified as to which array member is updated&lt;/a&gt; in this case.  See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-14662?focusedCommentId=806053&amp;amp;page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-806053&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;my comment on that ticket&lt;/a&gt; for a summary of the issue and a proposal to change the semantics of the positional operator in support of this use case.&lt;/p&gt;</comment>
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