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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>
    </build-info>


<item>
            <title>[SERVER-10926] NamespaceString inconsistent on allowing &apos;$&apos; in database name</title>
                <link>https://jira.mongodb.org/browse/SERVER-10926</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&quot;$test&quot; passes NamespaceString::validDBName(), but &quot;$test.foo&quot; doesn&apos;t pass NamespaceString::normal().&lt;/p&gt;

&lt;p&gt;I believe the bug is in NamespaceString::normal(), and the correct behavior is that &quot;$test.foo&quot; should pass validation.&lt;/p&gt;</description>
                <environment></environment>
        <key id="91709">SERVER-10926</key>
            <summary>NamespaceString inconsistent on allowing &apos;$&apos; in database name</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="rassi">J Rassi</reporter>
                        <labels>
                            <label>query-44-grooming</label>
                    </labels>
                <created>Thu, 26 Sep 2013 19:41:46 +0000</created>
                <updated>Tue, 6 Dec 2022 05:17:04 +0000</updated>
                            <resolved>Thu, 2 Apr 2020 20:06:00 +0000</resolved>
                                    <version>2.5.2</version>
                                                    <component>Catalog</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="2516290" author="milkie" created="Mon, 4 Nov 2019 16:22:00 +0000"  >&lt;p&gt;We may want to consider reverting the ticket that unlocked the ability to create databases with $ in the name, just in 4.3.&lt;/p&gt;</comment>
                            <comment id="2375156" author="milkie" created="Fri, 16 Aug 2019 15:29:51 +0000"  >&lt;p&gt;I think we may have fixed or changed the behavior with this recently with our code changes to NSS normal(); we will check.&lt;/p&gt;</comment>
                            <comment id="2375125" author="david.storch" created="Fri, 16 Aug 2019 15:20:34 +0000"  >&lt;p&gt;I believe that the Execution Team would be in the best position to triage an issue around validation of database names. I&apos;m moving it to their backlog and flagging for triage.&lt;/p&gt;</comment>
                            <comment id="1216780" author="robert.guo" created="Mon, 28 Mar 2016 15:41:37 +0000"  >&lt;p&gt;(I removed my two previous comments which no-longer apply to this ticket)&lt;/p&gt;

&lt;p&gt;After discussing with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kamran.khan&quot; class=&quot;user-hover&quot; rel=&quot;kamran.khan&quot;&gt;kamran.khan&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=geert.bosch&quot; class=&quot;user-hover&quot; rel=&quot;geert.bosch&quot;&gt;geert.bosch&lt;/a&gt;, I&apos;m removing this ticket from my queue and setting the fix version to &quot;Planning Bucket A&quot; (and should be moved to 3.5 required/desired). &lt;/p&gt;

&lt;p&gt;The problem is that there are a few dozen uses of NamespaceString::valid() scattered throughout the codebase, and modifying its behavior could subtly break some behavior. This is especially risky for our auth code.&lt;/p&gt;

&lt;p&gt;We also don&apos;t want to make &apos;$&apos; a valid db name character in NamespaceString::normal, which would allow users to create and use databases containing &quot;$&quot;. While there&apos;re no filesystem or OS issues with having a &quot;$&quot; in the dbname, our drivers will all need to be updated to support this &quot;feature&quot;, which is likely a lot more work and a potential cause for instability.&lt;/p&gt;

&lt;p&gt;The preferred solution is to fix &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22577&quot; title=&quot;mmapv1 should not allow creation of database names containing $&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22577&quot;&gt;&lt;del&gt;SERVER-22577&lt;/del&gt;&lt;/a&gt; in 3.3 so that no users will have any databases containing &quot;$&quot; in 3.4 (except $external); then, in the 3.5 cycle, we can make &quot;$&quot; fail NamespaceString::validDBName() and manually go through all places that use validDBName to add checks for &quot;$external&quot; explicitly wherever $external is needed. It will be much easier to reason about the logic once we know there won&apos;t be any databases containing &quot;$&quot;.&lt;/p&gt;</comment>
                            <comment id="1125608" author="kamran.khan" created="Mon, 4 Jan 2016 20:05:59 +0000"  >&lt;p&gt;The issue mentioned by &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jonathan.abrahams&quot; class=&quot;user-hover&quot; rel=&quot;jonathan.abrahams&quot;&gt;jonathan.abrahams&lt;/a&gt; seems to have been introduced between 2.6 and 3.0.  I think it&apos;s a separate bug from the one in the initial description.&lt;/p&gt;</comment>
                            <comment id="1124044" author="jonathan.abrahams" created="Wed, 30 Dec 2015 16:41:11 +0000"  >&lt;p&gt;This permits the users to create a DB with a $ in it, for mmapv1, but not wiredTiger. Try this code against both storage engines (in 3.2.0):&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;   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;use $foo&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;db.bar.insert({})&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;   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;show dbs&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="432374" author="rassi@10gen.com" created="Fri, 27 Sep 2013 14:21:39 +0000"  >&lt;p&gt;The user-visible side effects of this are that some operations/commands against these databases will succeed, and some won&apos;t:&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;   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; use $test&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;switched to db $test&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; db.dropDatabase() &lt;/span&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;// works&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;dropped&quot;&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; : &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;$test&quot;&lt;/span&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;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;ok&quot;&lt;/span&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; : 1 }&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;&amp;gt; db.foo.insert({}) &lt;/span&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;// does not work&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;   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;cannot insert into reserved $ collection&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
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            <issuekey id="828226">SERVER-42009</issuekey>
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