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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-76926] Unify insert and {upsert: true} insert behavior for $setOnInsert: Timestamp(0,0)</title>
                <link>https://jira.mongodb.org/browse/SERVER-76926</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Upon inserting a document with { $setOnInsert &lt;/p&gt;
{ &apos;a&apos; : Timestamp(0,0) }
&lt;p&gt;, the timestamp is overwritten to reflect the operational timestamp &lt;a href=&quot;https://github.com/10gen/mongo/blob/b1b452c5d6f74e2ab33df94b42a9dfda733797c5/src/mongo/db/ops/insert.cpp#L82-L176&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. However, an update with &lt;/p&gt;
{upsert: true}
&lt;p&gt; that specifies $setOnInsert &lt;/p&gt;
{ &apos;a&apos; : Timestamp(0,0) }
&lt;p&gt; preserves the value Timestamp(0,0) in the upserted document. This is inconsistent behavior between two types of inserts. &lt;/p&gt;

&lt;p&gt;I would recommend unifying this behavior.&lt;/p&gt;

&lt;p&gt;This ticket is relevant for the updateOneWithoutShardKey project as &lt;a href=&quot;https://github.com/10gen/mongo/blob/6570bf9e8fb766c7a79d10219184a538e1c0cee8/src/mongo/s/write_ops/write_without_shard_key_util.cpp#L297-L314&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;upserts are converted to inserts&lt;/a&gt; on mongos. So, while the user behavior would&apos;ve originally expected Timestamp(0,0) to remain, it now reflects the operational timestamp.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2335219">SERVER-76926</key>
            <summary>Unify insert and {upsert: true} insert behavior for $setOnInsert: Timestamp(0,0)</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="sanika.phanse@mongodb.com">Sanika Phanse</reporter>
                        <labels>
                    </labels>
                <created>Mon, 8 May 2023 20:39:24 +0000</created>
                <updated>Fri, 11 Aug 2023 18:05:31 +0000</updated>
                            <resolved>Wed, 14 Jun 2023 16:50:16 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5629490" author="JIRAUSER1264979" created="Fri, 11 Aug 2023 18:05:31 +0000"  >&lt;p&gt;How difficult would this be to fix? We&apos;re seeing inconsistencies in mongosync because of this. It would not be ideal to add a limitation that mongosync can&apos;t support syncing documents with a field of timestamp(0, 0).&lt;/p&gt;</comment>
                            <comment id="5499207" author="kyle.suarez" created="Wed, 14 Jun 2023 16:50:16 +0000"  >&lt;p&gt;After in a discussion in the Query Execution triage meeting, while we acknowledge this is an inconsistency in behavior, we don&apos;t think that this is worth fixing because it represents a corner case that almost no customer is going to encounter in practice. We&apos;re going to close this issue unless there&apos;s any actual customer impact.&lt;/p&gt;</comment>
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