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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-83522] absl::hash doesn&apos;t guarantee hashing values of different C++ types the same but we rely on that in SBE</title>
                <link>https://jira.mongodb.org/browse/SERVER-83522</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Absail&apos;s &lt;a href=&quot;https://github.com/abseil/abseil-cpp/blob/db5c79932e16e97e8b2f9ecd0e74f99f0e74e0d7/absl/hash/hash.h#L263-L265&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;hash.h&lt;/a&gt; states that the hash might depend on the C++ type and gives as an example that int and double might not hash the same. &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=patrick.freed%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;patrick.freed@mongodb.com&quot;&gt;patrick.freed@mongodb.com&lt;/a&gt; has found that in the latest abseil equal values of int32 and int64 types might produce different hashes. &lt;/p&gt;

&lt;p&gt;Note: in &lt;a href=&quot;https://github.com/10gen/mongo/blob/d6072dc2c6a08dca78ece915ad2868dcfb5c26ab/src/mongo/db/exec/sbe/values/value.cpp#L402&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;value::hashValue&lt;/a&gt; we already hash as int64_t doubles and decimals that can be represented as int64_t (and presumably those that cannot be represented as such won&apos;t compare equal to any int64_t values). &lt;/p&gt;</description>
                <environment></environment>
        <key id="2506890">SERVER-83522</key>
            <summary>absl::hash doesn&apos;t guarantee hashing values of different C++ types the same but we rely on that in SBE</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="3">Duplicate</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="irina.yatsenko@mongodb.com">Irina Yatsenko</reporter>
                        <labels>
                    </labels>
                <created>Tue, 21 Nov 2023 22:54:32 +0000</created>
                <updated>Tue, 28 Nov 2023 15:56:45 +0000</updated>
                            <resolved>Tue, 28 Nov 2023 15:56:45 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5909356" author="JIRAUSER1270969" created="Tue, 28 Nov 2023 15:56:02 +0000"  >&lt;p&gt;This will be fixed as a part of absl upgrade, no separate ticket necessary.&#160;&lt;/p&gt;</comment>
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            <issuekey id="2486536">SERVER-82618</issuekey>
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