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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>[SERVER-68108] $densify with dynamic bounds array causes &quot;A bounding array must contain either both dates or both numeric types&quot; error</title>
                <link>https://jira.mongodb.org/browse/SERVER-68108</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;I am trying to add missing data to my time series with the `$densify` operator.&#160;&lt;/p&gt;

&lt;p&gt;But it does not seem to work when I specify any dynamic values in the bounds array.&lt;/p&gt;

&lt;p&gt;*&lt;b&gt;Example&lt;/b&gt;*&lt;br/&gt;
With a simple data set:&lt;br/&gt;
```js&lt;br/&gt;
[&lt;br/&gt;
&#160; &#160;{ week: 1, value: 20 },&lt;br/&gt;
&#160; &#160;{ week: 2, value: 30 },&lt;br/&gt;
]&lt;br/&gt;
```&lt;br/&gt;
I want to fill in all weeks *&lt;b&gt;up until todays date&lt;/b&gt;*&#160;&lt;/p&gt;


&lt;p&gt;So with the following `$densify` operator I would expect it to work properly:&lt;br/&gt;
```js&lt;br/&gt;
{&lt;br/&gt;
&#160; field: &quot;week&quot;,&lt;br/&gt;
&#160; range: &lt;/p&gt;
{
&#160; &#160; step: 1,
&#160; &#160; bounds: [
&#160; &#160; &#160; 0,
&#160; &#160; &#160; \{ $week: &quot;$$CLUSTER_TIME&quot; }
&lt;p&gt;&#160; &#160; ]&lt;br/&gt;
&#160; }&lt;br/&gt;
}&lt;br/&gt;
```&lt;/p&gt;

&lt;p&gt;But I get the following error:&lt;/p&gt;

&lt;p&gt;`A bounding array must contain either both dates or both numeric types`&lt;/p&gt;

&lt;p&gt;Which does not make sense, because `{ $week: &quot;$$CLUSTER_TIME&quot; }` evalutes to a number, and 0 is definetly a number last I checked.&lt;/p&gt;

&lt;p&gt;Sounds like a bug with mongo to me, anyone know?&lt;/p&gt;</description>
                <environment></environment>
        <key id="2092399">SERVER-68108</key>
            <summary>$densify with dynamic bounds array causes &quot;A bounding array must contain either both dates or both numeric types&quot; error</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="13202">Works as Designed</resolution>
                                        <assignee username="samuel.mercier@mongodb.com">Sam Mercier</assignee>
                                    <reporter username="danielcooke1996@gmail.com">Daniel Cooke</reporter>
                        <labels>
                    </labels>
                <created>Mon, 18 Jul 2022 11:54:09 +0000</created>
                <updated>Fri, 27 Oct 2023 13:51:58 +0000</updated>
                            <resolved>Fri, 5 Aug 2022 15:00:32 +0000</resolved>
                                    <version>6.0.0-rc13</version>
                                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="4731231" author="JIRAUSER1265262" created="Fri, 5 Aug 2022 15:00:01 +0000"  >&lt;p&gt;Hi Daniel,&lt;/p&gt;

&lt;p&gt;Use of expressions in $densify is not currently supported by design. I&apos;ll suggest a note to be added to the docs to reflect this since it&apos;s came up a few times recently. However, it may be worth posting this to &lt;a href=&quot;https://feedback.mongodb.com/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;feedback.mongodb.com&lt;/a&gt; if you are interested in this feature.&lt;/p&gt;

&lt;p&gt;Thanks for your report!&lt;br/&gt;
Christopher&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
                            <comment id="4696477" author="JIRAUSER1270254" created="Thu, 21 Jul 2022 18:49:46 +0000"  >&lt;p&gt;I saw another issue relating to the inability to use expressions in the densify bounds, could this be the real issue ?&lt;/p&gt;</comment>
                            <comment id="4691263" author="JIRAUSER1265262" created="Wed, 20 Jul 2022 08:14:36 +0000"  >&lt;p&gt;Hi Daniel,&lt;/p&gt;

&lt;p&gt;Thanks for your report. I can see how you&apos;d expect this to work. My original hypothesis was that $$CLUSTER_TIME is stored differently internally as BSONType::bsonTimestamp, which is somehow being interpreted differently than numeric value 0. I noticed your reported behavior with $$NOW as well, which I believe is BSONType::Date. &lt;b&gt;However, doing a $toInt or $toDate on any values in $densify will also produce this error, including:&lt;/b&gt;&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;
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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;{&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;
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			&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;   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;&#160; range: {&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;   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;&#160; &#160; step: &lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1&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;,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;&#160; &#160; bounds: [&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;0&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;, {$toInt: &lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;10&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;}]&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;&#160; }&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;}&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;Which also reports &lt;b&gt;&quot;A bounding array must contain either both dates or both numeric types&quot;&lt;/b&gt;&lt;br/&gt;
As well as trying to cast $toDate in any way.&lt;br/&gt;
&#160;&lt;br/&gt;
I&apos;ll pass this along for more investigation, as I don&apos;t immediately see any mention of not being able to use dynamic bounds in the docs. Thanks for your report!&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Christopher&lt;br/&gt;
&#160;&lt;br/&gt;
&#160;&lt;/p&gt;</comment>
                            <comment id="4685300" author="JIRAUSER1270254" created="Mon, 18 Jul 2022 11:55:28 +0000"  >&lt;p&gt;I copied this issue from my StackOverflow textbox, so the formatting is all off - apologies&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="2092398">SERVER-68107</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2049301">SERVER-66536</issuekey>
        </issuelink>
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