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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-2935] shallow woEqual check used for index dup checking</title>
                <link>https://jira.mongodb.org/browse/SERVER-2935</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Dwight noticed this yesterday.  We probably want to do woCompare to handle cases like int/double comparison.&lt;/p&gt;


&lt;p&gt;    bool BtreeBucket::exists(const IndexDetails&amp;amp; idx, const DiskLoc &amp;amp;thisLoc, const BSONObj&amp;amp; key, const Ordering&amp;amp; order) const {&lt;br/&gt;
        int pos;&lt;br/&gt;
        bool found;&lt;br/&gt;
        DiskLoc b = locate(idx, thisLoc, key, order, pos, found, minDiskLoc);&lt;/p&gt;

&lt;p&gt;        // skip unused keys&lt;br/&gt;
        while ( 1 ) &lt;/p&gt;
{
            if( b.isNull() )
                break;
            const BtreeBucket *bucket = b.btree();
            const _KeyNode&amp;amp; kn = bucket-&amp;gt;k(pos);
            if ( kn.isUsed() )
                return bucket-&amp;gt;keyAt(pos).woEqual(key);
            b = bucket-&amp;gt;advance(b, pos, 1, &quot;BtreeBucket::exists&quot;);
        }
&lt;p&gt;        return false;&lt;br/&gt;
    }&lt;/p&gt;

&lt;p&gt;    bool BtreeBucket::wouldCreateDup(&lt;br/&gt;
        const IndexDetails&amp;amp; idx, const DiskLoc &amp;amp;thisLoc,&lt;br/&gt;
        const BSONObj&amp;amp; key, const Ordering&amp;amp; order,&lt;br/&gt;
        const DiskLoc &amp;amp;self) const {&lt;br/&gt;
        int pos;&lt;br/&gt;
        bool found;&lt;br/&gt;
        DiskLoc b = locate(idx, thisLoc, key, order, pos, found, minDiskLoc);&lt;/p&gt;

&lt;p&gt;        while ( !b.isNull() ) {&lt;br/&gt;
            // we skip unused keys&lt;br/&gt;
            const BtreeBucket *bucket = b.btree();&lt;br/&gt;
            const _KeyNode&amp;amp; kn = bucket-&amp;gt;k(pos);&lt;br/&gt;
            if ( kn.isUsed() ) &lt;/p&gt;
{
                if( bucket-&amp;gt;keyAt(pos).woEqual(key) )
                    return kn.recordLoc != self;
                break;
            }
&lt;p&gt;            b = bucket-&amp;gt;advance(b, pos, 1, &quot;BtreeBucket::dupCheck&quot;);&lt;br/&gt;
        }&lt;/p&gt;

&lt;p&gt;        return false;&lt;br/&gt;
    }&lt;/p&gt;</description>
                <environment></environment>
        <key id="16084">SERVER-2935</key>
            <summary>shallow woEqual check used for index dup checking</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="9">Done</resolution>
                                        <assignee username="dwight@mongodb.com">Dwight Merriman</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Tue, 12 Apr 2011 19:35:24 +0000</created>
                <updated>Tue, 12 Jul 2016 00:18:01 +0000</updated>
                            <resolved>Wed, 1 Jun 2011 13:37:59 +0000</resolved>
                                                    <fixVersion>1.9.1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="35552" author="auto" created="Wed, 1 Jun 2011 13:35:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;dwight&apos;, u&apos;name&apos;: u&apos;dwight&apos;, u&apos;email&apos;: u&apos;dwight@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2935&quot; title=&quot;shallow woEqual check used for index dup checking&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2935&quot;&gt;&lt;del&gt;SERVER-2935&lt;/del&gt;&lt;/a&gt; fix woEqual which wasnt equalling ints and doubles&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/600f2eef36c299b32810ce1a79c8bb4bb120c2ab&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/600f2eef36c299b32810ce1a79c8bb4bb120c2ab&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="32533" author="dwight_10gen" created="Fri, 13 May 2011 15:29:02 +0000"  >&lt;p&gt;@mathias yes - want to make a jira for that or something?  or just do it if you can in 5 minutes.&lt;/p&gt;</comment>
                            <comment id="32363" author="redbeard0531" created="Thu, 12 May 2011 19:41:09 +0000"  >&lt;p&gt;We should probably also consider reversed indexes to be dups so people don&apos;t have both &lt;/p&gt;
{a:1}
&lt;p&gt; and &lt;/p&gt;
{a:-1}</comment>
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