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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-1212] tighter index bounds for negated regular expression</title>
                <link>https://jira.mongodb.org/browse/SERVER-1212</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If we have {a:{$gt:&quot;a&quot;,$lt:&quot;r&quot;,$not:/^f/}} we&apos;ll still scan the strings beginning with f.&lt;/p&gt;</description>
                <environment></environment>
        <key id="12108">SERVER-1212</key>
            <summary>tighter index bounds for negated regular expression</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Thu, 10 Jun 2010 04:00:14 +0000</created>
                <updated>Mon, 15 Jun 2015 19:18:59 +0000</updated>
                            <resolved>Mon, 15 Jun 2015 19:18:59 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>2</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="940883" author="david.storch" created="Mon, 15 Jun 2015 19:18:59 +0000"  >&lt;p&gt;We currently do not have plans to change how we index negated regular expression predicates. Closing as &quot;Won&apos;t Fix&quot;.&lt;/p&gt;</comment>
                            <comment id="17593" author="aaron" created="Tue, 31 Aug 2010 00:35:42 +0000"  >&lt;p&gt;I had intended for this bug to cover all sorts of negated ranges, including $ne and $not ranges.  I also created &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-667&quot; title=&quot;implement tightest btree bounds possible for $not expressions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-667&quot;&gt;&lt;del&gt;SERVER-667&lt;/del&gt;&lt;/a&gt; for all the $not negated ranges.  This bug is scheduled for 1.7 early, while &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-667&quot; title=&quot;implement tightest btree bounds possible for $not expressions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-667&quot;&gt;&lt;del&gt;SERVER-667&lt;/del&gt;&lt;/a&gt; for 1.7.x.  Please let me know if the $not ranges should be 1.7 early or not.&lt;/p&gt;

&lt;p&gt;I&apos;ve done $ne and will be working on $nin next.&lt;/p&gt;</comment>
                            <comment id="17587" author="auto" created="Mon, 30 Aug 2010 21:52:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;login&apos;: &apos;astaple&apos;, &apos;name&apos;: &apos;Aaron&apos;, &apos;email&apos;: &apos;aaron@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1212&quot; title=&quot;tighter index bounds for negated regular expression&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1212&quot;&gt;&lt;del&gt;SERVER-1212&lt;/del&gt;&lt;/a&gt; deal with elemMatch later&lt;br/&gt;
&lt;a href=&quot;http://github.com/mongodb/mongo/commit/efc06b3a6c456935a613c58dbcfe90ec7d9dfeed&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://github.com/mongodb/mongo/commit/efc06b3a6c456935a613c58dbcfe90ec7d9dfeed&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="17586" author="auto" created="Mon, 30 Aug 2010 21:52:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;login&apos;: &apos;astaple&apos;, &apos;name&apos;: &apos;Aaron&apos;, &apos;email&apos;: &apos;aaron@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1212&quot; title=&quot;tighter index bounds for negated regular expression&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1212&quot;&gt;&lt;del&gt;SERVER-1212&lt;/del&gt;&lt;/a&gt; ne range negation checkpoint&lt;br/&gt;
&lt;a href=&quot;http://github.com/mongodb/mongo/commit/3b6de560b8862660f0da57b631de77731c316248&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://github.com/mongodb/mongo/commit/3b6de560b8862660f0da57b631de77731c316248&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="11365">SERVER-667</issuekey>
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            <issuelink>
            <issuekey id="12107">SERVER-1211</issuekey>
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            <issuekey id="12109">SERVER-1213</issuekey>
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            <issuekey id="52342">SERVER-7261</issuekey>
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