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    <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-82763] [CQF] Unify semantics of comparison operators in ABT</title>
                <link>https://jira.mongodb.org/browse/SERVER-82763</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently comparison &lt;a href=&quot;https://github.com/10gen/mongo/blob/17b198f47de67398a16d40a6e88e343851ef819b/src/mongo/db/query/optimizer/comparison_op.h#L37-L66&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Operations&lt;/a&gt; are used in &lt;a href=&quot;https://github.com/10gen/mongo/blob/17b198f47de67398a16d40a6e88e343851ef819b/src/mongo/db/query/optimizer/syntax/path.h#L142&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Paths&lt;/a&gt; and &lt;a href=&quot;https://github.com/10gen/mongo/blob/17b198f47de67398a16d40a6e88e343851ef819b/src/mongo/db/query/optimizer/syntax/expr.h#L208&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Expressions&lt;/a&gt;. In the former, their semantics are non type-bracketing, whereas in the latter their semantics are type-bracketing. This mismatch causes confusion and makes many rewrites difficult to reason about, for example, interval intersection and constant folding. After discussion with the QO team, the decision was to change the semantics of Expressions to also be non type-bracketing as was originally intended in the design of these structures.&lt;/p&gt;

&lt;p&gt;One problem is that the SBE stage builders have a dependency on ABT for constant folding and lowering. It appears that they use these structures with the assumption of Expressions having type-bracketing semantics, so changing this might cause breakages on master. Part of the task of this ticket would be to investigate the SBE stage builders dependency on ABT and address it.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2490102">SERVER-82763</key>
            <summary>[CQF] Unify semantics of comparison operators in ABT</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="ben.shteinfeld@mongodb.com">Ben Shteinfeld</assignee>
                                    <reporter username="ben.shteinfeld@mongodb.com">Ben Shteinfeld</reporter>
                        <labels>
                    </labels>
                <created>Fri, 3 Nov 2023 13:11:29 +0000</created>
                <updated>Mon, 27 Nov 2023 20:00:29 +0000</updated>
                            <resolved>Wed, 8 Nov 2023 13:04:18 +0000</resolved>
                                                    <fixVersion>7.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="5862924" author="xgen-internal-githook" created="Wed, 8 Nov 2023 02:41:00 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Ben Shteinfeld&apos;, &apos;email&apos;: &apos;ben.shteinfeld@mongodb.com&apos;, &apos;username&apos;: &apos;bshteinfeld&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-82763&quot; title=&quot;[CQF] Unify semantics of comparison operators in ABT&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-82763&quot;&gt;&lt;del&gt;SERVER-82763&lt;/del&gt;&lt;/a&gt; Unify the semantics of ABT Operations to always mean non-type bracketing in all contexts (paths and expressions).&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e9d31ada060b071128619e04a545fa016a4a4504&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e9d31ada060b071128619e04a545fa016a4a4504&lt;/a&gt;&lt;/p&gt;</comment>
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