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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-6470] aggregation converts regex values to strings in result set</title>
                <link>https://jira.mongodb.org/browse/SERVER-6470</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Observed behavior: An aggregation result based on a regular expression from mongod is converted to a string in the result set.&lt;br/&gt;
Expected behavior: The aggregation result is returned as a regular expression type.&lt;/p&gt;

&lt;p&gt;Test:&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;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 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;&amp;gt; c.save( { a:/x/i } )&lt;/span&gt;&lt;/pre&gt;
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				&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;   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;&amp;gt; c.find()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;{ &quot;_id&quot; : ObjectId(&quot;5004823ca08131138fd399d6&quot;), &quot;a&quot; : /x/i }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&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;   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;&amp;gt; c.aggregate( { $project:{ b:&apos;$a&apos; } } )&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 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;{&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&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;   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;	&quot;result&quot; : [&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&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;   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;		{&lt;/span&gt;&lt;/pre&gt;
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						&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-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;}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="44306">SERVER-6470</key>
            <summary>aggregation converts regex values to strings in result set</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="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Mon, 16 Jul 2012 21:10:23 +0000</created>
                <updated>Wed, 28 Oct 2015 04:26:19 +0000</updated>
                            <resolved>Tue, 11 Dec 2012 02:39:30 +0000</resolved>
                                                    <fixVersion>2.3.2</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="469651" author="xgen-internal-githook" created="Wed, 11 Dec 2013 23:18:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;estolfo&apos;, u&apos;name&apos;: u&apos;Emily Stolfo&apos;, u&apos;email&apos;: u&apos;emily@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/RUBY-698&quot; title=&quot;Add optional support to prevent compilation of BSON regexes into native types&quot; class=&quot;issue-link&quot; data-issue-key=&quot;RUBY-698&quot;&gt;&lt;del&gt;RUBY-698&lt;/del&gt;&lt;/a&gt; Only test regexes with aggregation if version &amp;gt; 2.3.2. &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6470&quot; title=&quot;aggregation converts regex values to strings in result set&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6470&quot;&gt;&lt;del&gt;SERVER-6470&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: 1.x-stable&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-ruby-driver/commit/ebfd6ce57033149dd4e511e64d73e5a0f7c386a2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-ruby-driver/commit/ebfd6ce57033149dd4e511e64d73e5a0f7c386a2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="211738" author="redbeard0531" created="Tue, 11 Dec 2012 02:39:30 +0000"  >&lt;p&gt;Backward breaking only in unlikely case of users depending on broken /a/i == &quot;a&quot; behavior.&lt;/p&gt;</comment>
                            <comment id="211638" author="auto" created="Tue, 11 Dec 2012 00:21:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-11-29T19:54:48Z&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;}
&lt;p&gt;Message: Add at least minimal support for all types to agg&lt;/p&gt;

&lt;p&gt;Minimal support means conversion to/from BSON, comparison and hashing.&lt;br/&gt;
This means that they can be passed through the pipeline correctly, used&lt;br/&gt;
in $sort, and used in _id expressions in $group.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4608&quot; title=&quot;aggregation:  allow binary data to pass through pipelines&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4608&quot;&gt;&lt;del&gt;SERVER-4608&lt;/del&gt;&lt;/a&gt; - Binary pass through&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5718&quot; title=&quot;Code and CodeWScope should be able to pass through aggregation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5718&quot;&gt;&lt;del&gt;SERVER-5718&lt;/del&gt;&lt;/a&gt; - Code/CodeWScope pass through&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6470&quot; title=&quot;aggregation converts regex values to strings in result set&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6470&quot;&gt;&lt;del&gt;SERVER-6470&lt;/del&gt;&lt;/a&gt; - Don&apos;t convert Regex to String&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7185&quot; title=&quot;Aggregation should support Symbol type&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7185&quot;&gt;&lt;del&gt;SERVER-7185&lt;/del&gt;&lt;/a&gt; - Symbol support&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fefb4334afe40664438668a289c6daed6813b3c3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fefb4334afe40664438668a289c6daed6813b3c3&lt;/a&gt;&lt;/p&gt;</comment>
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