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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-30172] Allow accessing StringData from a string-typed Value</title>
                <link>https://jira.mongodb.org/browse/SERVER-30172</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The Value class currently exposes a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.5.10/src/mongo/db/pipeline/value.h#L175&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;getString()&lt;/tt&gt; method&lt;/a&gt;, and has a private &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.5.10/src/mongo/db/pipeline/value.h#L340&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;getStringData()&lt;/tt&gt; method&lt;/a&gt; that does not do type checking.&lt;/p&gt;

&lt;p&gt;Many callers just need to read and compare the value of a string stored in a &lt;tt&gt;Value&lt;/tt&gt;, so would benefit from the &lt;tt&gt;StringData&lt;/tt&gt; version of this interface. We should expose a version of getStringData that does type checking. Since a StringData is just a reference to a string owned elsewhere, such a method could potentially be used incorrectly in a line of code such as:&lt;/p&gt;
&lt;p/&gt;
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					&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;auto myString = doc[&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;stringField&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;].getStringData();  &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;// Returning pointer to memory about to be de-allocated.&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;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;This should be avoided by deleting the r-value override of &lt;tt&gt;getStringData()&lt;/tt&gt;. As part of this work, we should consider auditing existing callers of getString() to see if they could use &lt;tt&gt;getStringData()&lt;/tt&gt; instead and see a performance improvement.&lt;/p&gt;</description>
                <environment></environment>
        <key id="404720">SERVER-30172</key>
            <summary>Allow accessing StringData from a string-typed Value</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Mon, 17 Jul 2017 16:16:12 +0000</created>
                <updated>Tue, 6 Dec 2022 03:56:44 +0000</updated>
                            <resolved>Thu, 8 Feb 2018 23:32:41 +0000</resolved>
                                                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1800249" author="charlie.swanson" created="Thu, 8 Feb 2018 23:32:41 +0000"  >&lt;p&gt;This was resolved as part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31477&quot; title=&quot;Support of LTRIM RTRIM TRIM function in mongodb&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31477&quot;&gt;&lt;del&gt;SERVER-31477&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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