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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-250] server should support map/reduce operations</title>
                <link>https://jira.mongodb.org/browse/SERVER-250</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is very similar to group() except group only allows a single key to be extracted per object; map would allow emitting several.  And use the map / reduce nomenclature.&lt;/p&gt;

&lt;p&gt;Needs to work with mongos too.&lt;/p&gt;

&lt;p&gt;db.coll.mapreduce(queryexpr, mapf, reducef);&lt;/p&gt;

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        <key id="10476">SERVER-250</key>
            <summary>server should support map/reduce operations</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="eliot">Eliot Horowitz</assignee>
                                    <reporter username="dwight@mongodb.com">Dwight Merriman</reporter>
                        <labels>
                    </labels>
                <created>Sun, 23 Aug 2009 10:14:20 +0000</created>
                <updated>Thu, 10 Sep 2009 10:03:07 +0000</updated>
                            <resolved>Sun, 23 Aug 2009 10:33:30 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="10690" author="eliot" created="Thu, 10 Sep 2009 10:03:07 +0000"  >&lt;p&gt;closed b/c resolved more than 2 week ago&lt;/p&gt;</comment>
                            <comment id="10525" author="eliot" created="Sun, 23 Aug 2009 10:33:30 +0000"  >&lt;p&gt;dup of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-208&quot; title=&quot;map reduce api&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-208&quot;&gt;&lt;del&gt;SERVER-208&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
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