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    <link>https://jira.mongodb.org</link>
    <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-42220] Add a getCheckpointCursor() function to the SortedDataInterface interface and implement it for WiredTiger</title>
                <link>https://jira.mongodb.org/browse/SERVER-42220</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;SortedDataInterface is similar to RecordStore, except SortedDataInterface is the interface through which to access WT tables for our index data and RecordStore is the interface though which to access the WT tables for our collection data. We do not store data in the same format in WT tables for index data as collection data.&lt;/p&gt;

&lt;p&gt;We will open a cursor at a WT checkpoint. Read about that here &lt;a href=&quot;http://source.wiredtiger.com/3.2.0/checkpoint.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://source.wiredtiger.com/3.2.0/checkpoint.html&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;WT has a WiredTigerCursor class responsible for creating the cursors that indexes use. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/903207938dc05f9e3f4ca546232d8a7ceda99e4c/src/mongo/db/storage/wiredtiger/wiredtiger_cursor.cpp#L47&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;WiredTigerCursor gets a cursor from the WiredTigerSessionCache&lt;/a&gt;. WiredTigerSessionCache is responsible for calling &lt;a href=&quot;https://github.com/mongodb/mongo/blob/903207938dc05f9e3f4ca546232d8a7ceda99e4c/src/mongo/db/storage/wiredtiger/wiredtiger_session_cache.cpp#L91&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;open_cursor&lt;/a&gt; against WT. It looks like the validate() function goes through &lt;a href=&quot;https://github.com/mongodb/mongo/blob/903207938dc05f9e3f4ca546232d8a7ceda99e4c/src/mongo/db/catalog/collection_impl.cpp#L1133&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; to &lt;a href=&quot;https://github.com/mongodb/mongo/blob/903207938dc05f9e3f4ca546232d8a7ceda99e4c/src/mongo/db/catalog/private/record_store_validate_adaptor.cpp#L143&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; where we use the IndexAccessMethod to instantiate a cursor. &lt;a href=&quot;https://github.com/mongodb/mongo/blob/bb4ba528dd4254c33ac77026f94bc287b590ff3c/src/mongo/db/storage/wiredtiger/wiredtiger_cursor.cpp#L37-L51&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;WiredTigerCursor appears to open a cursor via one of two WiredTigerSessionCache functions to get cursors&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="856001">SERVER-42220</key>
            <summary>Add a getCheckpointCursor() function to the SortedDataInterface interface and implement it for WiredTiger</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="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="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Fri, 12 Jul 2019 21:08:32 +0000</created>
                <updated>Fri, 27 Oct 2023 20:42:47 +0000</updated>
                            <resolved>Wed, 31 Jul 2019 20:44:17 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2346240" author="dianna.hohensee" created="Fri, 26 Jul 2019 19:41:22 +0000"  >&lt;p&gt;I expect that to be correct, but have not had a chance to verify it.&lt;/p&gt;</comment>
                            <comment id="2346227" author="louis.williams" created="Fri, 26 Jul 2019 19:35:30 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=dianna.hohensee&quot; class=&quot;user-hover&quot; rel=&quot;dianna.hohensee&quot;&gt;dianna.hohensee&lt;/a&gt; based on how we&apos;re implementing &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42218&quot; title=&quot;Enable getCursor() in the RecordStore to retrieve checkpoint cursors for WiredTiger&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42218&quot;&gt;&lt;del&gt;SERVER-42218&lt;/del&gt;&lt;/a&gt;, I don&apos;t think this work is required?&lt;/p&gt;</comment>
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            <issuekey id="856078">SERVER-42223</issuekey>
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