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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-64359] Server-side rewrite for aggregate command on mongos</title>
                <link>https://jira.mongodb.org/browse/SERVER-64359</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;From the design:&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;Aggregate commands are parsed into a LiteParsedPipeline and then are only parsed into a full pipeline if the pipeline is not passed through to the primary shard, &lt;a href=&quot;https://github.com/10gen/mongo/blob/d4baf64a2da1a785d428888f3ce047367ccc2a7a/src/mongo/s/query/cluster_aggregation_planner.cpp?plain=1#L591&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;which only happens in certain conditions&lt;/a&gt;. We can add another condition so that aggregate commands won&apos;t be passed through to the primary shard if there may be FLE2 rewrites that need to be done, so that $match rewrites will happen on mongos before the pipeline is sent along to the relevant shards by the AggregationTargeter.&lt;/p&gt;
&lt;h5&gt;&lt;a name=&quot;Stagerewrites&quot;&gt;&lt;/a&gt;Stage rewrites&lt;/h5&gt;

&lt;p&gt;We can add a transformation pass &lt;a href=&quot;https://github.com/10gen/mongo/blob/d4baf64a2da1a785d428888f3ce047367ccc2a7a/src/mongo/s/query/cluster_aggregate.cpp?plain=1#L314&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;right after the pipeline is parsed&lt;/a&gt; that is only run if there may be FLE2 rewrites to be done that will iterate through the stages in the pipeline and call rewriteQueryOnEncryptedFields() with the MatchExpression held by the &lt;a href=&quot;https://docs.google.com/document/d/1bE5Y91vctMykCUq1mX0bYq5oNKXCPjK4Fe18SisrIGk/edit#heading=h.29ndnxcxzxoz&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;relevant stage&lt;/a&gt;.&lt;/p&gt;&lt;/blockquote&gt;</description>
                <environment></environment>
        <key id="1997810">SERVER-64359</key>
            <summary>Server-side rewrite for aggregate command on mongos</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="13201">Fixed</resolution>
                                        <assignee username="hana.pearlman@mongodb.com">Hana Pearlman</assignee>
                                    <reporter username="davis.haupt@mongodb.com">Davis Haupt</reporter>
                        <labels>
                    </labels>
                <created>Wed, 9 Mar 2022 16:40:21 +0000</created>
                <updated>Sun, 29 Oct 2023 21:41:21 +0000</updated>
                            <resolved>Tue, 29 Mar 2022 12:20:21 +0000</resolved>
                                                    <fixVersion>6.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4440282" author="xgen-internal-githook" created="Mon, 28 Mar 2022 22:52:39 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Hana Pearlman&apos;, &apos;email&apos;: &apos;hana.pearlman@mongodb.com&apos;, &apos;username&apos;: &apos;HanaPearlman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-64359&quot; title=&quot;Server-side rewrite for aggregate command on mongos&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-64359&quot;&gt;&lt;del&gt;SERVER-64359&lt;/del&gt;&lt;/a&gt;: Implement FLE server-side rewrite for agg command on mongos&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6eb0a1b696278d4473365a169ae08f51c8a12388&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6eb0a1b696278d4473365a169ae08f51c8a12388&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4440281" author="xgen-internal-githook" created="Mon, 28 Mar 2022 22:52:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Hana Pearlman&apos;, &apos;email&apos;: &apos;hana.pearlman@mongodb.com&apos;, &apos;username&apos;: &apos;HanaPearlman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-64359&quot; title=&quot;Server-side rewrite for aggregate command on mongos&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-64359&quot;&gt;&lt;del&gt;SERVER-64359&lt;/del&gt;&lt;/a&gt;: Implement FLE server-side rewrite for agg command on mongos&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/eba86d95a34dd2b462dbd26ec52f2d8f1d06263b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/eba86d95a34dd2b462dbd26ec52f2d8f1d06263b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4410643" author="nicholas.zolnierz" created="Mon, 14 Mar 2022 17:21:32 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=hana.pearlman&quot; class=&quot;user-hover&quot; rel=&quot;hana.pearlman&quot;&gt;hana.pearlman&lt;/a&gt; We can keep &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63312&quot; title=&quot;Server-side rewrite for aggregate command on mongod&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63312&quot;&gt;&lt;del&gt;SERVER-63312&lt;/del&gt;&lt;/a&gt; but should prioritize this ticket as end-to-end testing will be available on mongos before a replica set.&lt;/p&gt;</comment>
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