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    <title>MongoDB Jira</title>
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    <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-38210] Text search with $diacriticSensitive bug with some chartacter</title>
                <link>https://jira.mongodb.org/browse/SERVER-38210</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi, I&apos;m from vietnam!&lt;/p&gt;

&lt;p&gt;I was build some project using mongodb. I use text index version 3 and using $diacriticSensitive query but it&apos;s not work in 2 characters of vietnamese is&lt;/p&gt;

&lt;p&gt;It&apos;s&#160;&lt;font color=&quot;#de350b&quot;&gt;&#273; : d&lt;/font&gt;&lt;/p&gt;

&lt;p&gt;Sample: b&#243;ng &lt;font color=&quot;#de350b&quot;&gt;&#273;&lt;/font&gt;&#225;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;with&#160;&quot;$diacriticSensitive&quot;: false&lt;/p&gt;

&lt;p&gt;i&apos;m query with &quot;bong &lt;font color=&quot;#de350b&quot;&gt;d&lt;/font&gt;a&quot; and not result match&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="636379">SERVER-38210</key>
            <summary>Text search with $diacriticSensitive bug with some chartacter</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="13202">Works as Designed</resolution>
                                        <assignee username="daniel.hatcher@mongodb.com">Danny Hatcher</assignee>
                                    <reporter username="binhvq.2010@gmail.com">B&#236;nh V&#432;&#417;ng</reporter>
                        <labels>
                    </labels>
                <created>Tue, 20 Nov 2018 01:06:14 +0000</created>
                <updated>Fri, 27 Oct 2023 13:53:24 +0000</updated>
                            <resolved>Mon, 26 Nov 2018 22:12:22 +0000</resolved>
                                                                    <component>Index Maintenance</component>
                    <component>Text Search</component>
                                        <votes>0</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="2072176" author="daniel.hatcher" created="Mon, 26 Nov 2018 22:12:16 +0000"  >&lt;p&gt;Hello,&lt;/p&gt;

&lt;p&gt;As Mark has identified the explanation for why these two characters are treated differently, I will close this as working as designed.&lt;/p&gt;

&lt;p&gt;Thank you,&lt;/p&gt;

&lt;p&gt;Danny&lt;/p&gt;</comment>
                            <comment id="2067408" author="binhvq.2010@gmail.com" created="Tue, 20 Nov 2018 03:44:35 +0000"  >&lt;p&gt;Thanks Mark Benvenuto!&lt;/p&gt;

&lt;p&gt;With same query and data in Mariadb Full Text Search or Elasticsearch asciifolding, it&apos;s worked.&lt;/p&gt;

&lt;p&gt;If this report is not isssue!&#160;I will have to add a field remove&#160;diacritics for query not ussing&#160;diacritics.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
                            <comment id="2067377" author="mark.benvenuto" created="Tue, 20 Nov 2018 02:32:17 +0000"  >&lt;p&gt;According &lt;a href=&quot;https://en.wikipedia.org/wiki/Vietnamese_alphabet&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;wikipedia&lt;/a&gt;, the lower-case characters &apos;d&apos; and &apos;&#273;&apos; (Unicode 0111) are different characters in Vietnamese Alphabet.&lt;/p&gt;

&lt;p&gt;The diacritics in-sensitive search is designed only to treat characters with and without diacritic marks the same. See &lt;a href=&quot;http://www.user.uni-hannover.de/nhtcapri/combining-marks.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.user.uni-hannover.de/nhtcapri/combining-marks.html&lt;/a&gt; for examples of characters with various diacritic marks. This means that lower-case characters &apos;d&apos; and &apos;&#273;&apos; are always going to be considered distinct characters regardless of the diacritic sensitive search option.&lt;/p&gt;</comment>
                            <comment id="2067364" author="binhvq.2010@gmail.com" created="Tue, 20 Nov 2018 02:16:24 +0000"  >&lt;p&gt;query with bong &lt;font color=&quot;#de350b&quot;&gt;&#273;&lt;/font&gt;a -&amp;gt; it&apos;s work and has result&lt;/p&gt;</comment>
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