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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>[JAVA-500] m/r out:db and out:sharded options</title>
                <link>https://jira.mongodb.org/browse/JAVA-500</link>
                <project id="10006" key="JAVA">Java Driver</project>
                    <description>&lt;p&gt;At this moment we can specify only &lt;a href=&quot;http://api.mongodb.org/java/2.7.0/com/mongodb/MapReduceCommand.OutputType.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MapReduceCommand.OutputType&lt;/a&gt; and collection name.&lt;/p&gt;
&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 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;                        DBObject query)&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 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;                 &lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;throws&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; MongoException&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;No way for &lt;a href=&quot;http://www.mongodb.org/display/DOCS/MapReduce#MapReduce-Outputoptions&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this&lt;/a&gt;: &lt;/p&gt;
&lt;blockquote&gt;
&lt;p&gt;Additional options within out objects are:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;&quot;db&quot; - the db name to output to.
&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; out : \{replace : &quot;collectionName&quot;, db : &quot;otherDB&quot;\}&lt;/span&gt;&lt;/pre&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt; 
&lt;p&gt;{ &lt;b&gt;sharded&lt;/b&gt; : true} - &lt;b&gt;MongoDB 1.9+&lt;/b&gt; If true and combined with an output mode that writes to a collection, the output collection will be sharded using the _id field. See details in the sharding section.&lt;/p&gt;&lt;/li&gt;
&lt;/ul&gt;
&lt;/blockquote&gt;</description>
                <environment></environment>
        <key id="27410">JAVA-500</key>
            <summary>m/r out:db and out:sharded options</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="9">Done</resolution>
                                        <assignee username="jeff.yemin@mongodb.com">Jeffrey Yemin</assignee>
                                    <reporter username="uladzimir_mihura@epam.com">Uladzimir Mihura</reporter>
                        <labels>
                            <label>epam</label>
                    </labels>
                <created>Thu, 29 Dec 2011 15:59:46 +0000</created>
                <updated>Wed, 19 Oct 2016 14:17:26 +0000</updated>
                            <resolved>Thu, 29 Dec 2011 16:07:57 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="81695" author="scotthernandez" created="Mon, 23 Jan 2012 18:10:37 +0000"  >&lt;p&gt;yes, there would need to be a change to the code. I have create another issue to track that api change: &lt;a href=&quot;https://jira.mongodb.org/browse/JAVA-508&quot; title=&quot;Add &amp;quot;out.*&amp;quot; support for MapReduceCommand&quot; class=&quot;issue-link&quot; data-issue-key=&quot;JAVA-508&quot;&gt;&lt;del&gt;JAVA-508&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="81686" author="pmaedel" created="Mon, 23 Jan 2012 17:49:18 +0000"  >&lt;p&gt;looking at toDBObject.toDBObject() clearly shows that there the out.sharded option is never being added from nowhere.&lt;br/&gt;
so with this version of the mongo java driver it is not possible to trigger a map reduce job that will perform a sharded output...&lt;/p&gt;

&lt;p&gt;why is this issue resolved?&lt;/p&gt;</comment>
                            <comment id="76587" author="scotthernandez" created="Thu, 29 Dec 2011 16:43:21 +0000"  >&lt;p&gt;Feel free to add a feature request. I don&apos;t think this method you describe is better or even and good idea; if anything we should make the MapReduceCommand a builder pattern and deprecate the existing method you first used in your example.&lt;/p&gt;

&lt;p&gt;More docs are always better &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/wink.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                            <comment id="76582" author="uladzimir_mihura@epam.com" created="Thu, 29 Dec 2011 16:27:25 +0000"  >&lt;p&gt;ALso I think that &lt;b&gt;MapReduceCommand&lt;/b&gt; can have the following constructor:&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;
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						&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;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;public&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; MapReduceCommand(DBCollection inputCollection,&lt;/span&gt;&lt;/pre&gt;
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						&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;   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;                        String map,&lt;/span&gt;&lt;/pre&gt;
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						&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;   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;                        String reduce,&lt;/span&gt;&lt;/pre&gt;
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						&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;   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;                        DBObject out,&lt;/span&gt;&lt;/pre&gt;
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						&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;   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;                        DBObject query)&lt;/span&gt;&lt;/pre&gt;
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						&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-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;                 &lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;throws&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; MongoException&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;-vova&lt;/p&gt;</comment>
                            <comment id="76581" author="uladzimir_mihura@epam.com" created="Thu, 29 Dec 2011 16:24:25 +0000"  >&lt;p&gt;Scott, &lt;/p&gt;

&lt;p&gt;This is &lt;b&gt;&lt;a href=&quot;http://api.mongodb.org/java/2.7.0/com/mongodb/MapReduceCommand.html#addExtraOption(java.lang.String, java.lang.Object)&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;addExtraOption&lt;/a&gt;&lt;/b&gt; method? &lt;br/&gt;
It will be nice to this this in javadoc.&lt;/p&gt;

&lt;p&gt;Thank you in advance.&lt;/p&gt;

&lt;p&gt;-vova&lt;/p&gt;</comment>
                            <comment id="76578" author="scotthernandez" created="Thu, 29 Dec 2011 16:07:45 +0000"  >&lt;p&gt;You have to use MapReduceCommand version to do this.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://api.mongodb.org/java/current/com/mongodb/DBCollection.html#mapReduce(com.mongodb.MapReduceCommand&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://api.mongodb.org/java/current/com/mongodb/DBCollection.html#mapReduce(com.mongodb.MapReduceCommand&lt;/a&gt;)&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="28881">JAVA-508</issuekey>
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