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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-31294] Separate ExpressionContext into ExpressionContext and AggregationContext</title>
                <link>https://jira.mongodb.org/browse/SERVER-31294</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Due to the introduction of &lt;tt&gt;Expression&lt;/tt&gt; into &lt;tt&gt;MatchExpression&lt;/tt&gt;, we now use the &lt;tt&gt;ExpressionContext&lt;/tt&gt; inside of &lt;tt&gt;MatchExpression&lt;/tt&gt;. But &lt;tt&gt;ExpressionContext&lt;/tt&gt; has members such as &lt;tt&gt;AggregationRequest&lt;/tt&gt; parameters and an owned &lt;tt&gt;CollatorInterface&lt;/tt&gt; that do not make sense outside of aggregation. We would like &lt;tt&gt;ExpressionContext&lt;/tt&gt; to only contain members relevant to &lt;tt&gt;Expression&lt;/tt&gt; (&lt;tt&gt;opCtx&lt;/tt&gt;, &lt;tt&gt;variables&lt;/tt&gt;, &lt;tt&gt;variablesParseState&lt;/tt&gt;, and &lt;tt&gt;_collator&lt;/tt&gt;) and make a new &lt;tt&gt;AggregationContext&lt;/tt&gt; to hold an &lt;tt&gt;ExpressionContext&lt;/tt&gt; and all the other state relevant to aggregation. &lt;tt&gt;AggregationContext&lt;/tt&gt; will be used inside of aggregation, and an &lt;tt&gt;Expression&lt;/tt&gt; should only hold an &lt;tt&gt;ExpressionContext&lt;/tt&gt;, which makes sense to use outside of aggregation.&lt;/p&gt;</description>
                <environment></environment>
        <key id="434002">SERVER-31294</key>
            <summary>Separate ExpressionContext into ExpressionContext and AggregationContext</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="tess.avitabile@mongodb.com">Tess Avitabile</reporter>
                        <labels>
                    </labels>
                <created>Wed, 27 Sep 2017 19:34:48 +0000</created>
                <updated>Tue, 6 Dec 2022 03:50:44 +0000</updated>
                                                                            <component>Aggregation Framework</component>
                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1756031" author="charlie.swanson" created="Tue, 19 Dec 2017 19:27:42 +0000"  >&lt;p&gt;When doing this work, we should consider merging the concepts of a MongoProcessInterface and an ExpressionContext into one thing.&lt;/p&gt;</comment>
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