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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-60837] CollectionUUID and OptionalCollectionUUID add more confusion than benefit</title>
                <link>https://jira.mongodb.org/browse/SERVER-60837</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In the codebase we have defined aliases for &lt;a href=&quot;https://github.com/mongodb/mongo/blob/2cc0443fb5d8d786eb59f528c5f2a15c95785e27/src/mongo/db/catalog/collection_options.h#L56&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;UUID&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/2cc0443fb5d8d786eb59f528c5f2a15c95785e27/src/mongo/db/catalog/collection_options.h#L58&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;boost::optional&amp;lt;UUID&amp;gt;&lt;/a&gt;, but the compiler doesn&apos;t ensure at all that they are used properly. For example, there are &lt;a href=&quot;https://github.com/mongodb/mongo/blob/2cc0443fb5d8d786eb59f528c5f2a15c95785e27/src/mongo/db/s/create_collection_coordinator.h#L154&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;many places&lt;/a&gt; which use &lt;tt&gt;boost::optional&amp;lt;UUID&amp;gt;&lt;/tt&gt; directly as a way to indicate an optional collection UUID.&lt;/p&gt;

&lt;p&gt;Because of this I found myself grepping for CollectionUUID and OptionalCollectionUUID with the expectation I will find all the usages referred to by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31540&quot; title=&quot;Change uses of boost::optional of UUID to UUID in the sharding codebase&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31540&quot;&gt;&lt;del&gt;SERVER-31540&lt;/del&gt;&lt;/a&gt; until I realised that this is not enough.&lt;/p&gt;

&lt;p&gt;Generally aliasing common types is not very useful, unless it is constrained to a very small piece of code (like a class).&lt;/p&gt;</description>
                <environment></environment>
        <key id="1903131">SERVER-60837</key>
            <summary>CollectionUUID and OptionalCollectionUUID add more confusion than benefit</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="daniel.gomezferro@mongodb.com">Daniel Gomez Ferro</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                            <label>neweng</label>
                            <label>techdebt</label>
                    </labels>
                <created>Wed, 20 Oct 2021 08:48:26 +0000</created>
                <updated>Sun, 29 Oct 2023 21:47:09 +0000</updated>
                            <resolved>Thu, 2 Dec 2021 09:29:53 +0000</resolved>
                                                    <fixVersion>5.2.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4226218" author="xgen-internal-githook" created="Thu, 2 Dec 2021 09:09:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Daniel G&#243;mez Ferro&apos;, &apos;email&apos;: &apos;daniel.gomezferro@mongodb.com&apos;, &apos;username&apos;: &apos;dgomezferro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60837&quot; title=&quot;CollectionUUID and OptionalCollectionUUID add more confusion than benefit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60837&quot;&gt;&lt;del&gt;SERVER-60837&lt;/del&gt;&lt;/a&gt; Remove CollectionUUID and OptionalCollectionUUID aliases&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a51938f6f77a6c4934c0cc91bca31cebb6af62e5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a51938f6f77a6c4934c0cc91bca31cebb6af62e5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4226217" author="xgen-internal-githook" created="Thu, 2 Dec 2021 09:09:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Daniel G&#243;mez Ferro&apos;, &apos;email&apos;: &apos;daniel.gomezferro@mongodb.com&apos;, &apos;username&apos;: &apos;dgomezferro&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60837&quot; title=&quot;CollectionUUID and OptionalCollectionUUID add more confusion than benefit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60837&quot;&gt;&lt;del&gt;SERVER-60837&lt;/del&gt;&lt;/a&gt; Remove CollectionUUID and OptionalCollectionUUID aliases&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/5f4954fd9acead226c768f099190f58c1c8bcdb8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/5f4954fd9acead226c768f099190f58c1c8bcdb8&lt;/a&gt;&lt;/p&gt;</comment>
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