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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-65345] CanonicalQuery with pushed down $group/$lookup stages should use classic plan cache key encoding</title>
                <link>https://jira.mongodb.org/browse/SERVER-65345</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Until &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61507&quot; title=&quot;Integrate $group lowering with the new SBE cache&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61507&quot;&gt;&lt;del&gt;SERVER-61507&lt;/del&gt;&lt;/a&gt; is complete, any CanonicalQuery that has a pushed down $group/$lookup should use the classic canonical query encoding. However, this is currently not the case. When &lt;a href=&quot;https://github.com/mongodb/mongo/blob/991ec6b14fa66ee81bc702c0f5e24a1541c6fa05/src/mongo/db/query/get_executor.cpp#L1319&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;constructing a slot based executor&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/991ec6b14fa66ee81bc702c0f5e24a1541c6fa05/src/mongo/db/query/get_executor.cpp#L641&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;generating a plan cache key&lt;/a&gt;, we encode &lt;a href=&quot;https://github.com/mongodb/mongo/blob/991ec6b14fa66ee81bc702c0f5e24a1541c6fa05/src/mongo/db/query/plan_cache_key_factory.cpp#L78-L80&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the shape of the CanonicalQuery&lt;/a&gt;. However, when determining whether to generate an SBE or a classic key, &lt;a href=&quot;https://github.com/mongodb/mongo/blob/991ec6b14fa66ee81bc702c0f5e24a1541c6fa05/src/mongo/db/query/canonical_query.cpp#L532-L536&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;we do not consider whether the canonical query has a non empty pipeline&lt;/a&gt;. That is, we can have an SBE compatible CanonicalQuery, but incorrectly use the SBE encoding because we have a set of pushed down $group/$lookup stages. This ticket should modify CanonicalQuery::encodeKey to consider whether we have any pushed down stages when determining which encoding to use.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2019725">SERVER-65345</key>
            <summary>CanonicalQuery with pushed down $group/$lookup stages should use classic plan cache key encoding</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="alexander.ignatyev@mongodb.com">Alexander Ignatyev</assignee>
                                    <reporter username="mihai.andrei@mongodb.com">Mihai Andrei</reporter>
                        <labels>
                    </labels>
                <created>Thu, 7 Apr 2022 18:46:13 +0000</created>
                <updated>Sun, 29 Oct 2023 21:39:51 +0000</updated>
                            <resolved>Wed, 27 Apr 2022 13:01:49 +0000</resolved>
                                                    <fixVersion>6.0.0-rc5</fixVersion>
                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4529925" author="xgen-internal-githook" created="Thu, 5 May 2022 21:21:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Alexander Ignatyev&apos;, &apos;email&apos;: &apos;alexander.ignatyev@mongodb.com&apos;, &apos;username&apos;: &apos;aligusnet&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65345&quot; title=&quot;CanonicalQuery with pushed down $group/$lookup stages should use classic plan cache key encoding&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65345&quot;&gt;&lt;del&gt;SERVER-65345&lt;/del&gt;&lt;/a&gt; Check if CanonicalQuery has pushed down stages&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 8aa42af0644b93e794db1b824238c4b2ab203d25)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3b505f1957c98f73423ffbb4371ea7c3f64fc98c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3b505f1957c98f73423ffbb4371ea7c3f64fc98c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4509490" author="xgen-internal-githook" created="Wed, 27 Apr 2022 12:59:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Alexander Ignatyev&apos;, &apos;email&apos;: &apos;alexander.ignatyev@mongodb.com&apos;, &apos;username&apos;: &apos;aligusnet&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65345&quot; title=&quot;CanonicalQuery with pushed down $group/$lookup stages should use classic plan cache key encoding&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65345&quot;&gt;&lt;del&gt;SERVER-65345&lt;/del&gt;&lt;/a&gt; Check if CanonicalQuery has pushed down stages&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8aa42af0644b93e794db1b824238c4b2ab203d25&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8aa42af0644b93e794db1b824238c4b2ab203d25&lt;/a&gt;&lt;/p&gt;</comment>
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