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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-42019] shorthand syntax for checking if _id value is missing</title>
                <link>https://jira.mongodb.org/browse/SERVER-42019</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In pipeline update specification it is common to check if a field doesn&apos;t exist and the way to tell if you&apos;re doing an upsert would be to check if _id doesn&apos;t exist.  I&apos;m proposing a shorthand syntax expression &lt;tt&gt;$onInsert&lt;/tt&gt; or &lt;tt&gt;ifUpsert&lt;/tt&gt; (exact work TBD) which would be short for:&lt;/p&gt;
&lt;p/&gt;
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        <key id="828815">SERVER-42019</key>
            <summary>shorthand syntax for checking if _id value is missing</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="asya.kamsky@mongodb.com">Asya Kamsky</reporter>
                        <labels>
                    </labels>
                <created>Sun, 30 Jun 2019 16:32:24 +0000</created>
                <updated>Tue, 6 Dec 2022 02:55:26 +0000</updated>
                                                                            <component>Aggregation Framework</component>
                    <component>Write Ops</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2305990" author="asya" created="Sun, 30 Jun 2019 16:33:51 +0000"  >&lt;p&gt;This would be useful the same way $setOnInsert was used in regular update modifiers.&lt;/p&gt;

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