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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-27195] Symbol BSON type compares incorrectly with String when the collation is non-simple</title>
                <link>https://jira.mongodb.org/browse/SERVER-27195</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The original design for the collation feature specified that collation-aware string comparison would only apply to BSONType::String. However, in all existing versions, String and Symbol have been considered the same canonical type, meaning that String &quot;a&quot; == Symbol &quot;a&quot;, String &quot;a&quot; &amp;lt; Symbol &quot;b&quot; and Symbol &quot;a&quot; &amp;lt; String &quot;b&quot;.&lt;/p&gt;

&lt;p&gt;As currently implemented, we only translate String (not Symbol) to the corresponding ICU comparison key. Therefore, translated String comparison keys will be compared directly to raw, untranslated Symbols in indexes with a collation. Such indexes are broken. Furthermore, comparisons between Symbol and String may not have a total order, since we only use the collator in the comparison if String is on the left-hand side. There may also be places in the query planner which are incorrect if the query involves the combination of Symbol and Collation.&lt;/p&gt;</description>
                <environment></environment>
        <key id="334640">SERVER-27195</key>
            <summary>Symbol BSON type compares incorrectly with String when the collation is non-simple</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                            <label>34errata</label>
                            <label>query-44-grooming</label>
                    </labels>
                <created>Mon, 28 Nov 2016 19:38:31 +0000</created>
                <updated>Wed, 11 Oct 2023 23:52:03 +0000</updated>
                                            <version>3.4.0-rc5</version>
                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>21</watches>
                                                                                                                <comments>
                            <comment id="1443732" author="redbeard0531" created="Mon, 28 Nov 2016 19:43:21 +0000"  >&lt;p&gt;Fixing this requires an on-disk change that will be incompatible with existing v:2 indexes (3.3/3.4-rc only) since we will need to generate different index keys for some input documents.&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="334718">SERVER-27200</issuekey>
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            <issuekey id="336756">SERVER-27300</issuekey>
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