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            <title>[SERVER-16884] Regex/index optimization should allow &quot;s&quot; option</title>
                <link>https://jira.mongodb.org/browse/SERVER-16884</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The optimization to determine index bounds from a regular expression, which works by checking whether the regex is left-anchored and contains a constant prefix, is not applied when the regex has any option other than &quot;m&quot; or &quot;x&quot; (see index_bounds_builder.cpp).&lt;/p&gt;

&lt;p&gt;There is no reason why the optimization shouldn&apos;t work for the option &quot;s&quot;, which only changes the behavior of the . operator, and . can never be part of the constant prefix anyway.&lt;/p&gt;

&lt;p&gt;So the suggestion is to perform the optimization even when &quot;s&quot; is present, just as with &quot;m&quot; and &quot;x&quot;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="179055">SERVER-16884</key>
            <summary>Regex/index optimization should allow &quot;s&quot; option</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="3">Duplicate</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="andre.spiegel@mongodb.com">Andre Spiegel</reporter>
                        <labels>
                    </labels>
                <created>Thu, 15 Jan 2015 22:18:13 +0000</created>
                <updated>Thu, 29 Jan 2015 17:13:33 +0000</updated>
                            <resolved>Thu, 29 Jan 2015 17:13:33 +0000</resolved>
                                    <version>2.6.7</version>
                                                    <component>Querying</component>
                                        <votes>1</votes>
                                    <watches>7</watches>
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                            <comment id="816616" author="david.storch" created="Thu, 29 Jan 2015 17:13:12 +0000"  >&lt;p&gt;Closing as a duplicate of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9035&quot; title=&quot;Regex &amp;quot;s&amp;quot; option causes mongo to use slow query plan&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9035&quot;&gt;&lt;del&gt;SERVER-9035&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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