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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-29588] Create a $_internalSchemaUniqueItems MatchExpression</title>
                <link>https://jira.mongodb.org/browse/SERVER-29588</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;h5&gt;&lt;a name=&quot;ProposedSyntax&quot;&gt;&lt;/a&gt;Proposed Syntax&lt;/h5&gt;
&lt;p/&gt;
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&lt;p/&gt;
&lt;p&gt;The match expression takes a single value: the boolean true. It matches an array whose elements are all unique, according to our definition of equality.&lt;/p&gt;

&lt;p&gt;With this, we could implement JSON Schema&apos;s &quot;uniqueItems&quot; validation keyword by compiling it to the MatchExpression&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="393029">SERVER-29588</key>
            <summary>Create a $_internalSchemaUniqueItems MatchExpression</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="13201">Fixed</resolution>
                                        <assignee username="kyle.suarez@mongodb.com">Kyle Suarez</assignee>
                                    <reporter username="kyle.suarez@mongodb.com">Kyle Suarez</reporter>
                        <labels>
                    </labels>
                <created>Mon, 12 Jun 2017 19:54:55 +0000</created>
                <updated>Mon, 30 Oct 2023 23:16:09 +0000</updated>
                            <resolved>Fri, 7 Jul 2017 19:36:08 +0000</resolved>
                                                    <fixVersion>3.5.10</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1616612" author="xgen-internal-githook" created="Fri, 7 Jul 2017 19:26:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;ksuarz&apos;, u&apos;name&apos;: u&apos;Kyle Suarez&apos;, u&apos;email&apos;: u&apos;kyle.suarez@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29588&quot; title=&quot;Create a $_internalSchemaUniqueItems MatchExpression&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29588&quot;&gt;&lt;del&gt;SERVER-29588&lt;/del&gt;&lt;/a&gt; create an $_internalSchemaUniqueItems MatchExpression&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/306e5376eaa4d48c6fc0ae1afb9a61e9eaffd498&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/306e5376eaa4d48c6fc0ae1afb9a61e9eaffd498&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1599367" author="kyle.suarez" created="Fri, 16 Jun 2017 16:44:28 +0000"  >&lt;p&gt;Interesting question: should we reject&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{$schemaUniqueItems: false}&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;? It would be a no-op.&lt;/p&gt;</comment>
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