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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>[DOCS-12086] Docs for SERVER-35419: Make diskRequirement in StageConstraints in DocumentSource reflect child pipeline requirements.</title>
                <link>https://jira.mongodb.org/browse/DOCS-12086</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
&lt;blockquote&gt;
&lt;h3&gt;&lt;a name=&quot;Description%3A&quot;&gt;&lt;/a&gt;Description: &lt;/h3&gt;

&lt;p&gt;Though the code change is internal code, a consequence of this is that users are no longer allowed to create views whose pipelines contain a $out stage, whether it&apos;s at the top level or nested inside a $lookup or $facet.&lt;/p&gt;

&lt;p&gt;See the docs changes for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34902&quot; title=&quot;view definitions should *not* allow $out as a stage&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34902&quot;&gt;&lt;del&gt;SERVER-34902&lt;/del&gt;&lt;/a&gt;; they&apos;re related.&lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;EngineeringTicketDescription%3A&quot;&gt;&lt;/a&gt;Engineering Ticket Description:&lt;/h3&gt;

&lt;p&gt;Currently, if a stage (e.g. `$lookup`) has a &quot;sub&quot; pipeline that requires it to write persistent data, the stage&apos;s diskRequirement doesn&apos;t reflect that.&lt;/p&gt;

&lt;p&gt;Instead the parent stage should have the max diskRequirement of it&apos;s pipeline&apos;s stages under the total ordering&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;kNoDiskUse &amp;lt; kWritesTmpData &amp;lt; kWritesPersistentData&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;e.g. of the bug &lt;a href=&quot;https://github.com/mongodb/mongo/blob/b93fe0e61bf7e8bc96da2edeb66afa1b915b0b77/src/mongo/db/pipeline/document_source_lookup.h#L100-L112&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/b93fe0e61bf7e8bc96da2edeb66afa1b915b0b77/src/mongo/db/pipeline/document_source_lookup.h#L100-L112&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/b93fe0e61bf7e8bc96da2edeb66afa1b915b0b77/src/mongo/db/pipeline/document_source_facet.cpp#L232-L265&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/b93fe0e61bf7e8bc96da2edeb66afa1b915b0b77/src/mongo/db/pipeline/document_source_facet.cpp#L232-L265&lt;/a&gt;&#160;&lt;/p&gt;&lt;/blockquote&gt;

&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;p&gt;Just going to tweak the blurbs from &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11807&quot; title=&quot;Docs for SERVER-34902: view definitions should *not* allow $out as a stage&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11807&quot;&gt;&lt;del&gt;DOCS-11807&lt;/del&gt;&lt;/a&gt; to explicitly include &quot;not even as part of $facets/$lookup&quot;&lt;/p&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="610851">DOCS-12086</key>
            <summary>Docs for SERVER-35419: Make diskRequirement in StageConstraints in DocumentSource reflect child pipeline requirements.</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="13201">Fixed</resolution>
                                        <assignee username="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="kay.kim@mongodb.com">Kay Kim</reporter>
                        <labels>
                            <label>read-only-views</label>
                    </labels>
                <created>Thu, 27 Sep 2018 15:41:29 +0000</created>
                <updated>Mon, 13 Nov 2023 18:30:56 +0000</updated>
                            <resolved>Tue, 8 Jan 2019 16:05:42 +0000</resolved>
                                                    <fixVersion>4.1.4</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2108698" author="xgen-internal-githook" created="Tue, 8 Jan 2019 16:05:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@mongodb.com&apos;, &apos;name&apos;: &apos;Kay Kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12086&quot; title=&quot;Docs for SERVER-35419: Make diskRequirement in StageConstraints in DocumentSource reflect child pipeline requirements.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12086&quot;&gt;&lt;del&gt;DOCS-12086&lt;/del&gt;&lt;/a&gt;: 4.2 view and out restriction - explicitly mention nested pipelines (revert the revert but fix docs number)&lt;/p&gt;

&lt;p&gt;This reverts commit 2e963f167edef26512fd05051574542da05b48b2.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/3ad34aca8c29579cfdd121d0c70f2077c3636880&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/3ad34aca8c29579cfdd121d0c70f2077c3636880&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                            <issuelinktype id="10320">
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                                        <issuelink>
            <issuekey id="554681">SERVER-35419</issuekey>
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            <issuekey id="667159">DOCS-12330</issuekey>
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