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    <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-80654] Handle older index entry formats where keystring does not have recordID appended correctly for reverse lookup</title>
                <link>https://jira.mongodb.org/browse/SERVER-80654</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Based on &lt;a href=&quot;https://github.com/10gen/mongo/blob/c5c3086dcae61481f80664f1de1dcd965aee2147/src/mongo/db/catalog/README.md#use-in-wiredtiger-indexes:&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/c5c3086dcae61481f80664f1de1dcd965aee2147/src/mongo/db/catalog/README.md#use-in-wiredtiger-indexes:&lt;/a&gt; &lt;/p&gt;

&lt;p&gt;During reverse lookup we should check if the secondary is unique or not, because for unique indexes the keystring might be stored without the recordID appended. &lt;/p&gt;

&lt;p&gt;Right now in reverse lookup we get the recordID from the keystring with decodeRecordId &lt;a href=&quot;https://github.com/10gen/mongo/blob/bbf84d93a5bb9a9aaa3d7a52acd14673772d4997/src/mongo/db/commands/dbcheck.cpp#L884&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;, so that wouldn&apos;t work if the keystring doesn&apos;t have the recordID appended. &lt;/p&gt;

&lt;p&gt;It&apos;s possible we could just get the RecordId from the KeyStringEntry struct though in all cases: &lt;a href=&quot;https://github.com/10gen/mongo/blob/bbf84d93a5bb9a9aaa3d7a52acd14673772d4997/src/mongo/db/storage/index_entry_comparison.h#L126&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/bbf84d93a5bb9a9aaa3d7a52acd14673772d4997/src/mongo/db/storage/index_entry_comparison.h#L126&lt;/a&gt; &lt;/p&gt;

&lt;p&gt;Additionally, when we call &lt;a href=&quot;https://github.com/10gen/mongo/blob/bbf84d93a5bb9a9aaa3d7a52acd14673772d4997/src/mongo/db/commands/dbcheck.cpp#L951&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;getKeys &lt;/a&gt; we should check whether we should be passing in the recordId - if the keystring didn&apos;t have the recordID appended then I don&apos;t think we should pass in the recordId here either. &lt;/p&gt;</description>
                <environment></environment>
        <key id="2431779">SERVER-80654</key>
            <summary>Handle older index entry formats where keystring does not have recordID appended correctly for reverse lookup</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="10033" iconUrl="https://jira.mongodb.org/images/icons/statuses/information.png" description="Status for tickets that need to be escalated and unblocked on our team.">Blocked</status>
                    <statusCategory id="4" key="indeterminate" colorName="inprogress"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="huayu.ouyang@mongodb.com">Huayu Ouyang</reporter>
                        <labels>
                            <label>pm-855-milestone-2</label>
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                <created>Thu, 31 Aug 2023 18:04:56 +0000</created>
                <updated>Fri, 19 Jan 2024 16:32:33 +0000</updated>
                                                                                                <votes>0</votes>
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