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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>[DOCS-14630] Investigate changes in SERVER-26991: Inconsistent handling of RegEx options</title>
                <link>https://jira.mongodb.org/browse/DOCS-14630</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #c2d2c2;&quot;&gt;
&lt;p&gt;    Find queries no longer ignore invalid regex flags, this makes it consistent with the behavior of the aggregate command and inside a projection.&lt;/p&gt;

&lt;p&gt;After upgrading to a version with this patch, if a collection has document validation configured with an invalid regex flag the server will log a warning and then prevent inserts until the DBA uses collMod to update the validator and no longer have an invalid flag&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    The server documents certain regex modifiers it supports: &lt;tt&gt;imxs&lt;/tt&gt;&lt;br/&gt;
&lt;a href=&quot;https://docs.mongodb.com/manual/reference/operator/query/regex/#op._S_options&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/reference/operator/query/regex/#op._S_options&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;It is actually inconsistent within itself of which options it supports:&lt;br/&gt;
&lt;tt&gt;gim&lt;/tt&gt;: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.4.0-rc3/src/mongo/bson/bsonelement.cpp#L245-L264&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.4.0-rc3/src/mongo/bson/bsonelement.cpp#L245-L264&lt;/a&gt;&lt;br/&gt;
&lt;tt&gt;imxs&lt;/tt&gt;: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.4.0-rc3/src/mongo/db/matcher/expression_leaf.cpp#L232-L244&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.4.0-rc3/src/mongo/db/matcher/expression_leaf.cpp#L232-L244&lt;/a&gt;&lt;/p&gt;



&lt;p&gt;These modifiers are inconsistent with BSON Regex modifiers: &lt;tt&gt;imxlsu&lt;/tt&gt;&lt;br/&gt;
&lt;a href=&quot;http://bsonspec.org/spec.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://bsonspec.org/spec.html&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The shell however only allows and supports: &lt;tt&gt;gimy&lt;/tt&gt;&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.4.0-rc3/src/third_party/mozjs-45/extract/js/src/vm/RegExpObject.cpp#L933-L955&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.4.0-rc3/src/third_party/mozjs-45/extract/js/src/vm/RegExpObject.cpp#L933-L955&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The server tools allow and support yet another set: &lt;tt&gt;gims&lt;/tt&gt;&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.4.0-rc3/src/mongo/gotools/common/bsonutil/bsonutil.go#L282-L287&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.4.0-rc3/src/mongo/gotools/common/bsonutil/bsonutil.go#L282-L287&lt;/a&gt;&lt;/p&gt;



</description>
                <environment></environment>
        <key id="1811299">DOCS-14630</key>
            <summary>Investigate changes in SERVER-26991: Inconsistent handling of RegEx options</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="ian.fogelman@mongodb.com">Ian Fogelman</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Wed, 7 Jul 2021 20:44:56 +0000</created>
                <updated>Sun, 29 Oct 2023 13:53:43 +0000</updated>
                            <resolved>Wed, 10 Nov 2021 20:07:42 +0000</resolved>
                                                    <fixVersion>5.1.0-rc0</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4178830" author="xgen-internal-githook" created="Tue, 9 Nov 2021 20:49:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;ian fogelman&apos;, &apos;email&apos;: &apos;ian.fogelman@mongodb.com&apos;, &apos;username&apos;: &apos;ianf-mongodb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14630&quot; title=&quot;Investigate changes in SERVER-26991: Inconsistent handling of RegEx options&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14630&quot;&gt;&lt;del&gt;DOCS-14630&lt;/del&gt;&lt;/a&gt; 5.1 regex functionality updates&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/cb087c4c4bbae986c97bd6a970a15a1976541953&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/cb087c4c4bbae986c97bd6a970a15a1976541953&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3921731" author="mickey.winters" created="Wed, 7 Jul 2021 21:02:43 +0000"  >&lt;p&gt;see &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14628&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/DOCS-14628&lt;/a&gt; for something I already found in the extended json docs semi related to this&lt;/p&gt;</comment>
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            <issuekey id="331136">SERVER-26991</issuekey>
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            <issuekey id="1810931">DOCS-14628</issuekey>
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