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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-13184] Investigate changes in SERVER-32314: Add $replaceOne expression</title>
                <link>https://jira.mongodb.org/browse/DOCS-13184</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;

    &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;    adds a $replaceOne expression.&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 query team has discussed and decided on the following syntax and semantics&lt;/p&gt;
&lt;h3&gt;&lt;a name=&quot;Name%3A%24replaceOne&quot;&gt;&lt;/a&gt;Name: $replaceOne&lt;/h3&gt;
&lt;h4&gt;&lt;a name=&quot;RejectedAlternateNames%3A%24replaceFirst%2C%24replaceOnce%2C%24stringReplaceOne&quot;&gt;&lt;/a&gt;Rejected Alternate Names: $replaceFirst, $replaceOnce, $stringReplaceOne&lt;/h4&gt;
&lt;p&gt;It takes in three expressions that must evaluate to strings: an original string, a string to search for, and a string to insert. This evaluates to a new string with the first occurrence of `find` in `input` replaced by `replacement`. If no occurrences are found, it evaluates to the input string. Expressions in each argument are first evaluated and an error thrown if any input evaluates to a non-nullish non-string type.. Next, if any arguments are nullish, returns null.&lt;/p&gt;

&lt;p&gt;Because this is a searching algorithm and not a direct string comparison, this computation will not consider the operation&apos;s collation. This is consistent with other similar expressions like $indexOfCP and $regexFind. This expression is not required to throw an error on invalid UTF-8, though it must be implemented in such a way as to avoid undefined or unsafe behaviors when given invalid UTF-8 as input. This permits implementation of the expression as a byte-matching algorithm rather than a code point matching algorithm. This expression will not do unicode normalization. This means that a character like &apos;&#233;&apos; may not be considered a match if the input string represents it as one unicode character and the &apos;find&apos; string represents it as two characters: a normal &apos;e&apos; and a &lt;a href=&quot;https://en.wikipedia.org/wiki/Combining_character&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;combining diacritical mark&lt;/a&gt;.&lt;br/&gt;
Syntax:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ $replaceOne: { input: &amp;lt;Expression&amp;gt;, find: &amp;lt;Expression&amp;gt;, replacement: &amp;lt;Expression&amp;gt; } }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;h3&gt;&lt;a name=&quot;OriginalTicketDescription&quot;&gt;&lt;/a&gt;Original Ticket Description&lt;/h3&gt;
&lt;p&gt;Hi Team,&lt;/p&gt;

&lt;p&gt;There is no method for string replacement in mongoDB(similar to &quot;REPLACE&quot; in Oracle or other DB)&lt;br/&gt;
We need this functionality in our production environment.&lt;br/&gt;
Kindly do the needful to add the function in your library.&lt;/p&gt;

&lt;p&gt;Thanks&lt;br/&gt;
Devendra&lt;/p&gt;


&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="984618">DOCS-13184</key>
            <summary>Investigate changes in SERVER-32314: Add $replaceOne expression</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="andrew.feierabend@mongodb.com">Andrew Feierabend</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                            <label>docs-grab-bag</label>
                    </labels>
                <created>Wed, 30 Oct 2019 23:07:32 +0000</created>
                <updated>Mon, 13 Nov 2023 18:14:26 +0000</updated>
                            <resolved>Fri, 14 Feb 2020 20:23:03 +0000</resolved>
                                                    <fixVersion>4.3.3</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2879345" author="xgen-internal-githook" created="Fri, 14 Feb 2020 20:22:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;andf-mongodb&apos;, &apos;name&apos;: &apos;Andrew Feierabend&apos;, &apos;email&apos;: &apos;andrew.feierabend@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13184&quot; title=&quot;Investigate changes in SERVER-32314: Add $replaceOne expression&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13184&quot;&gt;&lt;del&gt;DOCS-13184&lt;/del&gt;&lt;/a&gt; add replaceOne expression&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/a99321789cde63ab456a48d51edb40c76ab5306f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/a99321789cde63ab456a48d51edb40c76ab5306f&lt;/a&gt;&lt;/p&gt;</comment>
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