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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[DOCS-15215] [Server] Investigate changes in SERVER-58716: Allow finds with hints using index spec on time-series collections</title>
                <link>https://jira.mongodb.org/browse/DOCS-15215</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Original Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;    A hint on a time-series collection can now specify an index spec.&lt;/p&gt;

&lt;p&gt;Previously, we had this restriction: &quot;On a time series collection, you can only specify hints using the index name, not the index key pattern.&quot;  This ticket lifts that restriction, so a hint can use either an index name or a key pattern.  (This makes the behavior more similar to a normal collection.)&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    Currently, retrieving documents from a time-series collection using the find command and an index spec as a hint returns a BadValue exception as the index spec in the hint isn&apos;t translated to its corresponding buckets collection index spec. We currently only support indexes on the timeField and metaField for time-series collections, so we should allow queries with index spec as hints to work by translating the index spec in the hint to its buckets collection index spec. This &lt;a href=&quot;https://github.com/mongodb/mongo/blob/a0198789a90fb099a252a441849ac0678d3862a7/src/mongo/db/timeseries/timeseries_index_schema_conversion_functions.h#L46-L53&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;helper function&#160;&lt;/a&gt;will be useful as it performs the index spec translation.&lt;/p&gt;
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                <environment></environment>
        <key id="2018849">DOCS-15215</key>
            <summary>[Server] Investigate changes in SERVER-58716: Allow finds with hints using index spec on time-series collections</summary>
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                                            <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>
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                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
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                            <label>feature</label>
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                <created>Wed, 6 Apr 2022 21:41:52 +0000</created>
                <updated>Mon, 22 Jan 2024 16:06:25 +0000</updated>
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                    <component>Server</component>
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Previously, we had this restriction: &amp;quot;On a time series collection, you can only specify hints using the index name, not the index key pattern.&amp;quot;  This ticket lifts that restriction, so a hint can use either an index name or a key pattern.  (This makes the behavior more similar to a normal collection.)</customfieldvalue>

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