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    <title>MongoDB Jira</title>
    <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-36186] Ignore value of oplogReplay find command option</title>
                <link>https://jira.mongodb.org/browse/SERVER-36186</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;oplogReplay&lt;/tt&gt; option to the find command (and &lt;tt&gt;oplogReplay&lt;/tt&gt; bit in the legacy OP_QUERY find protocol) currently must be set by the client in order to enable an optimized code path for queries looking for a particular range of &lt;tt&gt;ts&lt;/tt&gt; values in the oplog. See &lt;a href=&quot;https://github.com/mongodb/mongo/blob/960fca37a78040d75d87f8049ef4c4a6227506cc/src/mongo/db/query/get_executor.cpp#L570&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;getOplogStartHack()&lt;/a&gt; in get_executor.cpp.&lt;/p&gt;

&lt;p&gt;Instead of requiring clients to explicitly enable this optimization, the query system should automatically optimize such queries, whether or not &lt;tt&gt;oplogReplay&lt;/tt&gt; is set. This should allow us to mark the &lt;tt&gt;oplogReplay&lt;/tt&gt; option as deprecated. The implementation can change to accept &lt;tt&gt;oplogReplay&lt;/tt&gt; but entirely ignore its true/false value.&lt;/p&gt;</description>
                <environment></environment>
        <key id="572997">SERVER-36186</key>
            <summary>Ignore value of oplogReplay find command option</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="13201">Fixed</resolution>
                                        <assignee username="xinhao.zhang@mongodb.com">Xin Hao Zhang</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Wed, 18 Jul 2018 18:45:15 +0000</created>
                <updated>Sun, 29 Oct 2023 22:29:44 +0000</updated>
                            <resolved>Wed, 24 Jul 2019 14:17:06 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Querying</component>
                    <component>Replication</component>
                    <component>Storage</component>
                                        <votes>2</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="2345423" author="xgen-internal-githook" created="Fri, 26 Jul 2019 14:01:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Xin Hao Zhang&apos;, &apos;email&apos;: &apos;xinhao.zhang@mongodb.com&apos;, &apos;username&apos;: &apos;xinhaoz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36186&quot; title=&quot;Ignore value of oplogReplay find command option&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36186&quot;&gt;&lt;del&gt;SERVER-36186&lt;/del&gt;&lt;/a&gt; Delete moved function&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f839c1c4b94b292252a14170662ecc3daea2d638&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f839c1c4b94b292252a14170662ecc3daea2d638&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2341412" author="xgen-internal-githook" created="Wed, 24 Jul 2019 13:57:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Xin Hao Zhang&apos;, &apos;username&apos;: &apos;xinhaoz&apos;, &apos;email&apos;: &apos;xinhao.zhang@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36186&quot; title=&quot;Ignore value of oplogReplay find command option&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36186&quot;&gt;&lt;del&gt;SERVER-36186&lt;/del&gt;&lt;/a&gt; Default to the the oplogreplay optimization path for oplog collections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5c9f7fb5d38df176bda950bdea6aaadbcb73e8e1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5c9f7fb5d38df176bda950bdea6aaadbcb73e8e1&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="594109">DRIVERS-710</issuekey>
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            <issuekey id="874129">DOCS-12912</issuekey>
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                    <name>Related</name>
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                                        <issuelink>
            <issuekey id="1451589">SERVER-50518</issuekey>
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                            <customfieldvalue>The oplogReplay flag is now deprecated. Please update &lt;a href=&quot;https://docs.mongodb.com/manual/reference/mongodb-wire-protocol/#op-query&quot;&gt;https://docs.mongodb.com/manual/reference/mongodb-wire-protocol/#op-query&lt;/a&gt; to mark the oplogReplay OP_QUERY wire protocol flag to reflect this.&lt;br/&gt;
&lt;br/&gt;
Any application which sets this flag can safely remove it when communicating with a 4.4 server. The flag is still needed to optimize oplog queries when communicating with a 4.2 or older server.</customfieldvalue>

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