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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-60222] Consider changing all variadic expressions to short-circuit in SBE</title>
                <link>https://jira.mongodb.org/browse/SERVER-60222</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-59785&quot; title=&quot;[SBE] Change $concatArrays to not short-circuit on null&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-59785&quot;&gt;&lt;del&gt;SERVER-59785&lt;/del&gt;&lt;/a&gt;, we have decided to err on the side of consistency and make $concatArrays &lt;b&gt;not&lt;/b&gt; short-circuit in SBE, to match the behavior of the rest of the variadic expressions. However, for expressions that take an arbitrary number of arguments, there is a practical performance benefit to short-circuiting early when it is known that the result should be e.g. null.&lt;/p&gt;

&lt;p&gt;This ticket is to consider implementing a uniform policy in SBE, wherein fixed, low-arity expressions always evaluate all arguments, but variadic expressions will attempt to short-circuit when possible for the sake of efficiency.&lt;/p&gt;

&lt;p&gt;The list of variadic expressions currently implemented in SBE are&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;$concat&lt;/li&gt;
	&lt;li&gt;$add&lt;/li&gt;
	&lt;li&gt;$multiply&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="1883187">SERVER-60222</key>
            <summary>Consider changing all variadic expressions to short-circuit in SBE</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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-execution">Backlog - Query Execution</assignee>
                                    <reporter username="kyle.suarez@mongodb.com">Kyle Suarez</reporter>
                        <labels>
                    </labels>
                <created>Fri, 24 Sep 2021 19:07:08 +0000</created>
                <updated>Tue, 6 Dec 2022 00:54:37 +0000</updated>
                                                                            <component>Query Execution</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
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