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    <link>https://jira.mongodb.org</link>
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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-50121] Add &apos;min&apos; and &apos;max&apos; parameters to aggregate command</title>
                <link>https://jira.mongodb.org/browse/SERVER-50121</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&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;    aggregate: &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;mycoll&quot;&lt;/span&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;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;    pipeline: [],&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;Analogous to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39567&quot; title=&quot;Query with min/max modifier uses hashed index&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39567&quot;&gt;&lt;del&gt;SERVER-39567&lt;/del&gt;&lt;/a&gt;, the aggregate command must also specify a hint if either the &apos;min&apos; or &apos;max&apos; parameters are specified.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1430840">SERVER-50121</key>
            <summary>Add &apos;min&apos; and &apos;max&apos; parameters to aggregate command</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="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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                            <label>PM-234-M3</label>
                            <label>PM-234-T-data-clone</label>
                            <label>query-work-resharding</label>
                    </labels>
                <created>Wed, 5 Aug 2020 15:16:08 +0000</created>
                <updated>Tue, 6 Dec 2022 02:13:10 +0000</updated>
                            <resolved>Tue, 25 Aug 2020 15:51:48 +0000</resolved>
                                                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3339694" author="max.hirschhorn@10gen.com" created="Fri, 14 Aug 2020 16:34:02 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=david.storch&quot; class=&quot;user-hover&quot; rel=&quot;david.storch&quot;&gt;david.storch&lt;/a&gt;, the proposal to add min/max to the aggregation subsystem came from a conversation with Charlie and Bernard on the resharding design document.&lt;/p&gt;

&lt;p&gt;If I have understood query language semantics correctly, then I believe&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;{$match: {$expr: {$gte: [&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;$_id&quot;&lt;/span&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;, &amp;lt;resume _id&amp;gt;]}}}&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;wouldn&apos;t be subjected to type bracketing. However, we currently don&apos;t generate index bounds for {$expr: {$gte}} queries. I think &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39943&quot; title=&quot;Create match expressions for aggregation $gt/$gte/$lt/$lte and add to $expr rewrite&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39943&quot;&gt;&lt;del&gt;SERVER-39943&lt;/del&gt;&lt;/a&gt; is for allowing {$expr: {$gte}} queries to use an index? I want the index bounds to be [&amp;lt;resume _id&amp;gt;, MaxKey].&lt;/p&gt;

&lt;p&gt;There was also an exchange between Charlie, Bernard, and me that {$expr: {$gte}} queries may not sort the same way as $sort. I wasn&apos;t sure the reason - is it due to array values? We aren&apos;t able to specify the {$sort: {_id: 1}} in the collection cloning for resharding pipeline anyway; distributed aggregation planning is unable to push down both a {$sort: {_id: 1}} stage and a {$lookup: {from: {db: &quot;config&quot;, coll: &quot;cache.chunks.*&quot;}}} stage to the donor shards as part of the split pipeline. To work around this limitation, the plan is for the merging pipeline to implicitly assume the hint implies a _id:1 sort order and merge the results across different donor shards in sorted order.&lt;/p&gt;</comment>
                            <comment id="3339641" author="david.storch" created="Fri, 14 Aug 2020 16:14:50 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=max.hirschhorn&quot; class=&quot;user-hover&quot; rel=&quot;max.hirschhorn&quot;&gt;max.hirschhorn&lt;/a&gt; I think this change is best avoided. The &lt;tt&gt;min&lt;/tt&gt; and &lt;tt&gt;max&lt;/tt&gt; find command parameters are awkward, and I wouldn&apos;t want to extend their reach to the aggregation subsystem. Instead, we should consider adding match expressions or expressions that allow the equivalent of the &lt;tt&gt;min&lt;/tt&gt;/&lt;tt&gt;max&lt;/tt&gt; predicate to be expressed.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="1400143">SERVER-49293</issuekey>
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