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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-43114] Optimize seekExact for WiredTiger </title>
                <link>https://jira.mongodb.org/browse/SERVER-43114</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, WiredTigerIndex::seekExact converts the KeyString passed in into BSON and then converts it to KeyString again with a discriminator byte. This is related to how we store RecordId at the end of KeyString and use WT&apos;s search_near() and then selectively call prev()/next() on the cursor. In the reverse cursor way, we want to append a kExclusiveAfter so that it can land on the exact match.&lt;/p&gt;

&lt;p&gt;This is certainly unideal, as we have to do two extra conversions just for appending a discriminator when it&apos;s a reverse cursor. Maybe WiredTigerIndex::seekExact should use a different combinations of WT&apos;s search_near(), prev() and next() to find the match so that we don&apos;t need to append any discriminator byte. Or maybe we just need to add a helper method on KeyString that could easily append a discriminator byte to itself.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="913911">SERVER-43114</key>
            <summary>Optimize seekExact for WiredTiger </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="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="13203">Gone away</resolution>
                                        <assignee username="louis.williams@mongodb.com">Louis Williams</assignee>
                                    <reporter username="xiangyu.yao@mongodb.com">Xiangyu Yao</reporter>
                        <labels>
                    </labels>
                <created>Fri, 30 Aug 2019 20:46:30 +0000</created>
                <updated>Fri, 27 Oct 2023 20:42:42 +0000</updated>
                            <resolved>Fri, 6 Sep 2019 16:58:45 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2410942" author="louis.williams" created="Fri, 6 Sep 2019 16:58:45 +0000"  >&lt;p&gt;This problem this ticket describes no longer exists because of the changes in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42972&quot; title=&quot;Callers of SortedDataInterface::seekExact should pass KeyString&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42972&quot;&gt;&lt;del&gt;SERVER-42972&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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