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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-54969] Collection scan bounds for clustered collections should allow for exclusivity</title>
                <link>https://jira.mongodb.org/browse/SERVER-54969</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Timeseries collections are clustered by the &lt;tt&gt;_id&lt;/tt&gt; field. To take advantage of this property, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54008&quot; title=&quot;Generalize CollectionScan node so it can perform bounded scans over time series bucket collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54008&quot;&gt;&lt;del&gt;SERVER-54008&lt;/del&gt;&lt;/a&gt; has extended the query system to execute plans which scan ranges of a collection. Prior to this change, collection scan plans generally needed to scan the entire collection, rather than scanning a range of record ids bounded by &lt;span class=&quot;error&quot;&gt;&amp;#91;recordIdMin, recordIdMax&amp;#93;&lt;/span&gt;.&lt;/p&gt;

&lt;p&gt;The implementation from &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54008&quot; title=&quot;Generalize CollectionScan node so it can perform bounded scans over time series bucket collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54008&quot;&gt;&lt;del&gt;SERVER-54008&lt;/del&gt;&lt;/a&gt; currently assumes that the min and max record id bounds are always inclusive. It does not support exclusive bounds on either side, such as (recordIdMin, recordIdMax], [recordIdMin, recordIdMax), or (recordIdMin, recordIdMax). It would make sense to allow exclusive bounds in order to bring COLLSCAN bounds more in line with IXSCAN bounds. This would also make sense in order to enable more predicates to be &quot;trimmed&quot; as suggested by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54715&quot; title=&quot;Trim predicates off CollectionScanNode if they are expressible directly as bounds on RecordStore&amp;#39;s primary key&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54715&quot;&gt;SERVER-54715&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;As an implementation note, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=louis.williams&quot; class=&quot;user-hover&quot; rel=&quot;louis.williams&quot;&gt;louis.williams&lt;/a&gt; and myself agreed that a likely implementation would enforce exclusivity on the query side rather than as part of the storage API. That is, the scan operator implemented by query would continue to use &lt;a href=&quot;https://github.com/mongodb/mongo/blob/dd395723139d3d04cb05c66136a670102be210f1/src/mongo/db/storage/record_store.h#L198&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;SeekableRecordCursor::seekNear()&lt;/a&gt;, but would be careful skip over the records at the endpoints if the bounds are exclusive.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1639975">SERVER-54969</key>
            <summary>Collection scan bounds for clustered collections should allow for exclusivity</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="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Thu, 4 Mar 2021 21:42:21 +0000</created>
                <updated>Tue, 6 Dec 2022 01:32:30 +0000</updated>
                                                                            <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
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                                                                <inwardlinks description="is related to">
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            <issuekey id="1599102">SERVER-54008</issuekey>
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            <issuekey id="1630078">SERVER-54715</issuekey>
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