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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-59704] Support for $expr clauses in the query predicate of an upsert</title>
                <link>https://jira.mongodb.org/browse/SERVER-59704</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We have the following use case:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;document contains a &quot;version&quot; field that, for legacy reasons, is a string containing an int&lt;/li&gt;
	&lt;li&gt;we want to ensure that we are not overriding a newer version of the document&lt;/li&gt;
	&lt;li&gt;if no document is present, create it&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;if &quot;version&quot; was an int, it would be simple: updateOne({ id: XXXX, version:&#8239;{ $lt:&#8239;&lt;em&gt;newVersion&lt;/em&gt; }}, {$set: {...}}, { upsert: true })&lt;/p&gt;

&lt;p&gt;as &quot;version&quot; is a string, we have to use: updateOne({ id: XXXX, $where: &quot;parseInt(this.version) &amp;lt; &lt;em&gt;newVersion&lt;/em&gt;&quot;, {$set: {...}}, { upsert: true })&lt;/p&gt;

&lt;p&gt;This has pretty dramatic performance implications, though.&lt;/p&gt;

&lt;p&gt;In this use case it would be useful to have support for $expr in the query predicate of an upsert as we could use aggregation expressions such as $toInt instead of $where. The semantics would ideally be the same as with $where - ie the $expr would be discarded when upserting rather than evaluated to figure out if there are fields to be set.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1865095">SERVER-59704</key>
            <summary>Support for $expr clauses in the query predicate of an upsert</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="sylvain.chambon@mongodb.com">Sylvain Chambon</reporter>
                        <labels>
                    </labels>
                <created>Wed, 1 Sep 2021 08:16:28 +0000</created>
                <updated>Tue, 6 Dec 2022 00:57:49 +0000</updated>
                                            <version>5.0.2</version>
                                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="4501159" author="asya" created="Fri, 22 Apr 2022 21:52:59 +0000"  >&lt;p&gt;Asked about here: &#160;&lt;a href=&quot;https://www.mongodb.com/community/forums/t/how-to-use-mongodb-date-time-in-filter/159191/2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.mongodb.com/community/forums/t/how-to-use-mongodb-date-time-in-filter/159191/2&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
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