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    <title>MongoDB Jira</title>
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    <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-75564] Avoid executing DocumentSourceInternalUnpackBucket::doOptimizeAt() twice for sharded time-series collections</title>
                <link>https://jira.mongodb.org/browse/SERVER-75564</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;For queries on sharded views, we do the optimization on the pipeline twice. The first time, when the query is sent on the view definition to the primary shard, and the second time when the query is send on the base collection (after the kickback to mongos). For normal views, this is ok, because the pipeline optimizations are generally idempotent. But the&#160;&lt;tt&gt;DocumentSourceInternalUnpackBucket::doOptimizeAt()&lt;/tt&gt;&#160;may not idempotent. There are known issues (like &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60373&quot; title=&quot;Duplicate predicates in query plan for time-series collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60373&quot;&gt;&lt;del&gt;SERVER-60373&lt;/del&gt;&lt;/a&gt;), where this function generates duplicates stages. We should use this ticket to evaluate any other potential issues with running the function twice and address them.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2304028">SERVER-75564</key>
            <summary>Avoid executing DocumentSourceInternalUnpackBucket::doOptimizeAt() twice for sharded time-series collections</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="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-integration">Backlog - Query Integration</assignee>
                                    <reporter username="naama.bareket@mongodb.com">Naama Bareket</reporter>
                        <labels>
                            <label>qi-timeseries</label>
                    </labels>
                <created>Fri, 31 Mar 2023 21:28:52 +0000</created>
                <updated>Fri, 2 Feb 2024 23:57:02 +0000</updated>
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