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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>[COMPASS-6036] Investigate changes in SERVER-68213: Stop generating an OP_QUERY-style query representation in the shell&apos;s find implementation</title>
                <link>https://jira.mongodb.org/browse/COMPASS-6036</link>
                <project id="13182" key="COMPASS">Compass </project>
                    <description>    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Original Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;    This ticket removes two cursor methods from the legacy mongo shell.&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;DBQuery.prototype.modifiers: The &#8216;modifiers()&#8217; method could be used to add arbitrary options to the query. However, the modifiers were specified using an old syntax related to the no-longer-supported OP_QUERY wire protocol message. The &#8216;modifiers()&#8217; method was part of an old version of the drivers CRUD API and does not appear in the current CRUD API spec (&lt;a href=&quot;https://github.com/mongodb/specifications/blob/master/source/crud/crud.rst&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/specifications/blob/master/source/crud/crud.rst&lt;/a&gt;) or the current drivers find command spec (&lt;a href=&quot;https://github.com/mongodb/specifications/blob/master/source/find_getmore_killcursors_commands.rst&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/specifications/blob/master/source/find_getmore_killcursors_commands.rst&lt;/a&gt;). Any code using the &#8216;modifiers()&#8217; method should switch to using the explicit methods offered for setting options on a cursor.&lt;/li&gt;
	&lt;li&gt;DBQuery.prototype.countReturn: The &#8216;countReturn()&#8217; method would run a count comment without the skip or limit, and then apply the skip and limit on the client side. It had very few tests and was unneeded given that the skip and limit for a count command can be applied on the server side. Furthermore, the drivers spec for running count operations does not have any equivalent of &#8216;countReturn()&#8217; to my knowledge. Any code using &#8216;countReturn()&#8217; should be able to safely switch to using &#8216;count(true)&#8217;, where &#8216;true&#8217; indicates that the skip and limit should be applied server-side.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;These changes apply only to the legacy mongo shell, so there are no changes to mongosh.&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    The implementation of &lt;tt&gt;DBQuery&lt;/tt&gt; in the shell currently will internally construct an OP_QUERY-style object. Let&apos;s take the following simple example query:&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;const cursor = db.myCollection.find({x: 3}).sort({y: 1}).hint({x: 1});&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;The &lt;tt&gt;cursor&lt;/tt&gt; object is a &lt;tt&gt;DBQuery&lt;/tt&gt;. The &lt;tt&gt;_query&lt;/tt&gt; property of the &lt;tt&gt;DBQuery&lt;/tt&gt; will be a JS object that looks like this:&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;{query: {x: 3}, orderby: {y: 1}, $hint: {x: 1}}&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;This is the format that was formerly accepted in the &lt;tt&gt;query&lt;/tt&gt; field of an &lt;a href=&quot;https://www.mongodb.com/docs/v5.0/reference/mongodb-wire-protocol/#op_query&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;OP_QUERY wire protocol message&lt;/a&gt;. However, OP_QUERY was deprecated in MongoDB 5.0 and removed in MongoDB 5.1. The OP_QUERY-style payload is summarily converted into a find command by the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/baabc0676730dacb0dec1e1d035e23827bc22d80/src/mongo/shell/query.js#L168&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;_convertToCommand()&lt;/tt&gt;&lt;/a&gt; helper.&lt;/p&gt;

&lt;p&gt;These shenanigans used to be necessary when the &lt;tt&gt;mongo&lt;/tt&gt; shell supported by OP_QUERY legacy reads and the find command. But now that OP_QUERY reads are a thing of the past, the shell code should be simplified to construct the find command format directly.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="2117215">COMPASS-6036</key>
            <summary>Investigate changes in SERVER-68213: Stop generating an OP_QUERY-style query representation in the shell&apos;s find implementation</summary>
                <type id="10501" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Investigation</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="-1">Unassigned</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Thu, 18 Aug 2022 17:16:13 +0000</created>
                <updated>Tue, 23 Aug 2022 15:57:34 +0000</updated>
                            <resolved>Tue, 23 Aug 2022 15:57:34 +0000</resolved>
                                                    <fixVersion>No version</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
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            <issuekey id="2096763">SERVER-68213</issuekey>
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