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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-1317] The MapReduce output field &quot;Ok&quot; value  is not correct</title>
                <link>https://jira.mongodb.org/browse/JAVA-1317</link>
                <project id="10006" key="JAVA">Java Driver</project>
                    <description>&lt;p&gt;The map reduce out put is &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;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 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;/pre&gt;
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				&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;   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;{ &quot;serverUsed&quot; : &quot;localhost:27017&quot; , &lt;/span&gt;&lt;/pre&gt;
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				&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;   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;  &quot;results&quot; : [ { &quot;_id&quot; : &quot;Bui01&quot; , &quot;value&quot; : 40.0} , { &quot;_id&quot; : &quot;Bui02&quot; , &quot;value&quot; : 52.0}] , &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;  &quot;timeMillis&quot; : 2 , &quot;timing&quot; : { &quot;mapTime&quot; : 0 , &quot;emitLoop&quot; : 1 , &quot;reduceTime&quot; : 1 , &quot;mode&quot; : &quot;mixed&quot; , &quot;total&quot; : 2} , &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;  &quot;counts&quot; : { &quot;input&quot; : 5 , &quot;emit&quot; : 5 , &quot;reduce&quot; : 2 , &quot;output&quot; : 2} , &quot;ok&quot; : 1.0},  &lt;/span&gt;&lt;/pre&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt; but the  field &quot;ok&quot; is 1.0, it should be 1, it&apos;s not correct.&lt;/p&gt;</description>
                <environment>Mongodb 2.6.3, java driver 2.12.3</environment>
        <key id="148301">JAVA-1317</key>
            <summary>The MapReduce output field &quot;Ok&quot; value  is not correct</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="ross@mongodb.com">Ross Lawley</assignee>
                                    <reporter username="Rambo">Dong [X]</reporter>
                        <labels>
                    </labels>
                <created>Tue, 22 Jul 2014 08:04:05 +0000</created>
                <updated>Wed, 23 Jul 2014 07:04:07 +0000</updated>
                            <resolved>Tue, 22 Jul 2014 12:10:36 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="668474" author="ross@10gen.com" created="Wed, 23 Jul 2014 07:04:07 +0000"  >&lt;p&gt;Hi Dong that all looks fine.  The &quot;ok&quot; value in a command result is set as a Double by the server so &lt;tt&gt;1.0&lt;/tt&gt; is the correct representation.  &lt;/p&gt;

&lt;p&gt;Other than being represented differently in the shell (for the reasons mentioned above) is there any other reason why you think it should be an integer?&lt;/p&gt;</comment>
                            <comment id="668265" author="rambo" created="Wed, 23 Jul 2014 01:29:34 +0000"  >&lt;p&gt;Hi Ross,&lt;/p&gt;

&lt;p&gt;   I have not use command result for an inline map reduce, I used Mapreduceoutput  for merge, and my java code in the attachment, please check it. &lt;/p&gt;</comment>
                            <comment id="667391" author="ross@10gen.com" created="Tue, 22 Jul 2014 12:10:36 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=Rambo&quot; class=&quot;user-hover&quot; rel=&quot;Rambo&quot;&gt;Rambo&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I think you are referring to the command result for an inline map reduce? And the differences between the shell representation and Java?&lt;/p&gt;

&lt;p&gt;The command result is a wrapper of a DBObject and as such is handled the same as any DBObject coming from the server.  CommandResults return a double value for the &quot;ok&quot; field which is why its expressed as 1.0&lt;/p&gt;

&lt;p&gt;So why is this different from the shell?  In truth its &lt;b&gt;not&lt;/b&gt; different!  However, in javascript the representation of numbers is different and the mongo shell treats all numbers as floating-point values [1].  &lt;/p&gt;

&lt;p&gt;You can test that in JS 1 and 1.0 are the same in the shell by doing:&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: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; var a = 1.0&lt;/span&gt;&lt;/pre&gt;
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				&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;   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;&amp;gt; typeof a&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;number&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&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;&amp;gt; a&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&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-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;1 // The Javascript representation of 1.0 is 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;So they appear to be different in the string representations of the command result document - however the types are the same and that is why in Java it is a Double. I hope that clarifies why they appear to be different.&lt;/p&gt;

&lt;p&gt;It should also be noted access to the &lt;tt&gt;commandResult&lt;/tt&gt; via  the &lt;tt&gt;getCommandResult()&lt;/tt&gt; or &lt;tt&gt;getRaw()&lt;/tt&gt; methods are deprecated and due to be removed in the future.&lt;/p&gt;

&lt;p&gt;[1] &lt;a href=&quot;http://docs.mongodb.org/manual/core/shell-types/#numberint&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/core/shell-types/#numberint&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="48355" name="MapReduceTest.java" size="1342" author="Rambo" created="Wed, 23 Jul 2014 01:30:00 +0000"/>
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