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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-44326] Add $replaceAll expression</title>
                <link>https://jira.mongodb.org/browse/SERVER-44326</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The query team has discussed and agreed on the following syntax:&lt;/p&gt;
&lt;h3&gt;&lt;a name=&quot;Name%24replaceAll&quot;&gt;&lt;/a&gt;Name $replaceAll&lt;/h3&gt;
&lt;h4&gt;&lt;a name=&quot;Rejectedalternatenames%3A%24stringReplace%2C%24substringReplace%2C%24replaceSubstring%2C%24stringReplaceAll&quot;&gt;&lt;/a&gt;Rejected alternate names: $stringReplace, $substringReplace, $replaceSubstring, $stringReplaceAll&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 would evaluate to a new string with all occurrences of `find` in `input` replaced by `replacement`. Expressions in each argument would first be evaluated and an error thrown if any input evaluates to a non-string, non-nullish type. Next, if any evaluate to null, the expression evaluates to 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. Like these other searching expressions, there will be no 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 combining diacritical mark.&lt;/p&gt;

&lt;p&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;{ $replaceAll: { 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;p&gt;Rejected 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;{ $replace: [ &amp;lt;Expression | input&amp;gt;, &amp;lt;Expression | find&amp;gt;, &amp;lt;Expression | replace&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;p&gt;For now we will only support strings as all arguments, we will error on other types.&lt;/p&gt;</description>
                <environment></environment>
        <key id="984595">SERVER-44326</key>
            <summary>Add $replaceAll expression</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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.percy@mongodb.com">David Percy</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                            <label>expression</label>
                            <label>neweng</label>
                            <label>pm1457</label>
                    </labels>
                <created>Wed, 30 Oct 2019 22:56:21 +0000</created>
                <updated>Mon, 25 Nov 2019 19:56:53 +0000</updated>
                            <resolved>Mon, 25 Nov 2019 19:56:53 +0000</resolved>
                                                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2565260" author="david.percy" created="Mon, 25 Nov 2019 19:56:53 +0000"  >&lt;p&gt;Closing as duplicate since we decided to do this as part of&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32314&quot; title=&quot;Add $replaceOne and $replaceAll expressions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32314&quot;&gt;&lt;del&gt;SERVER-32314&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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