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    <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-9447] Key values too large to index</title>
                <link>https://jira.mongodb.org/browse/SERVER-9447</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;A few questions regarding key values too large to index. What happens to a key value is too large to index?  In particular, what happens to that entry?  Is it indexed up to the full 1024 byte limit?  Is it skipped?&lt;/p&gt;

&lt;p&gt;Also what happens during querying?  If an value is not in the index because it is too large, will MongoDB do a full table scan for that value?  Or will MongoDB only return values that are indexed?&lt;/p&gt;

&lt;p&gt;Thanks for answer my many questions.&lt;/p&gt;</description>
                <environment>CentOS 5.9</environment>
        <key id="72982">SERVER-9447</key>
            <summary>Key values too large to index</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="jlaptavi">Joseph Laptavijok</reporter>
                        <labels>
                    </labels>
                <created>Wed, 24 Apr 2013 17:29:10 +0000</created>
                <updated>Wed, 10 Dec 2014 23:05:32 +0000</updated>
                            <resolved>Thu, 25 Apr 2013 02:45:49 +0000</resolved>
                                    <version>2.2.2</version>
                                                    <component>Index Maintenance</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="321237" author="jlaptavi" created="Thu, 25 Apr 2013 11:24:19 +0000"  >&lt;p&gt;Thank you for the info Dan.&lt;/p&gt;</comment>
                            <comment id="320991" author="dan@10gen.com" created="Thu, 25 Apr 2013 02:45:49 +0000"  >&lt;p&gt;Hi Joseph, please see this ticket for more information: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5290&quot; title=&quot;fail to insert docs with fields too long to index, and fail to create indexes where doc keys are too big&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5290&quot;&gt;&lt;del&gt;SERVER-5290&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;At this time, the behavior is that the document is inserted, but an index entry on a field greater than max size is not created.  If the query optimizer chooses an index to use where this has occurred, the document will not be retrieved and no additional table scan will be performed.  This bug is scheduled to be fixed in the 2.5 development cycle.&lt;/p&gt;</comment>
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