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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-6335] aggregation framework: disallow $where in $match </title>
                <link>https://jira.mongodb.org/browse/SERVER-6335</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;server gets a segfault when using $where operator in a pipeline, e.g.:&lt;/p&gt;

&lt;p&gt;db.blah.aggregate({$match: {$where: &quot;return true;&quot;}}) crashes the server. &lt;/p&gt;</description>
                <environment>linux x86-64 </environment>
        <key id="43578">SERVER-6335</key>
            <summary>aggregation framework: disallow $where in $match </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="robert.pintarelli">Robert Pintarelli</reporter>
                        <labels>
                            <label>crash</label>
                    </labels>
                <created>Fri, 6 Jul 2012 19:35:58 +0000</created>
                <updated>Wed, 15 Aug 2012 14:15:06 +0000</updated>
                            <resolved>Thu, 12 Jul 2012 23:02:09 +0000</resolved>
                                    <version>2.1.2</version>
                                    <fixVersion>2.2.0-rc0</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="142761" author="auto" created="Fri, 13 Jul 2012 14:31:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-07-13T07:30:36-07:00&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6335&quot; title=&quot;aggregation framework: disallow $where in $match &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6335&quot;&gt;&lt;del&gt;SERVER-6335&lt;/del&gt;&lt;/a&gt; aggreation: no operations in statements&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/93f18db9910d1bd0f7b6197cc9348f429a0166f5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/93f18db9910d1bd0f7b6197cc9348f429a0166f5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="142604" author="auto" created="Thu, 12 Jul 2012 22:58:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-07-12T14:53:45-07:00&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6335&quot; title=&quot;aggregation framework: disallow $where in $match &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6335&quot;&gt;&lt;del&gt;SERVER-6335&lt;/del&gt;&lt;/a&gt; don&apos;t allow $where inside aggregation $match&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a807e3ef56902fa67435dc6cef7d0b9714c15a73&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a807e3ef56902fa67435dc6cef7d0b9714c15a73&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="141207" author="robert.pintarelli" created="Tue, 10 Jul 2012 07:32:49 +0000"  >&lt;p&gt;I tried to reduce the number of &quot;$unwind&quot; and &quot;$group&quot; steps in an aggreation pipeline with a single $where construct to test which pipeline performs better. &lt;/p&gt;</comment>
                            <comment id="140941" author="redbeard0531" created="Mon, 9 Jul 2012 18:11:11 +0000"  >&lt;p&gt;@Robert: do you have a use case where $where is needed in aggregation? There shouldn&apos;t be anything that needs it at this point. One exception would be accessing other objects through the db variable, but that wouldn&apos;t work correctly anyway.&lt;/p&gt;</comment>
                            <comment id="140939" author="redbeard0531" created="Mon, 9 Jul 2012 18:08:43 +0000"  >&lt;p&gt;$where can&apos;t be supported for 2.2 because it will not work in mongos&lt;/p&gt;</comment>
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