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https://issues.apache.org/jira/browse/SOLR-8001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hoss Man updated SOLR-8001:
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Attachment: SOLR-8001.patch
David: please check out the attached patch and let me know if this is what you
had in mind.
NOTE: I discovered that the sort *order* when using this function on docs w/o
values is inconsistent with the order when using a single valued field
(containing the same effictive value) and filed that as a seperate bug since i
can't think of a clear solution at the moment: SOLR-8005
> Using value sources on a multi-valued field can result in an exception if no
> data
> ---------------------------------------------------------------------------------
>
> Key: SOLR-8001
> URL: https://issues.apache.org/jira/browse/SOLR-8001
> Project: Solr
> Issue Type: Bug
> Reporter: David Smiley
> Assignee: Hoss Man
> Priority: Minor
> Attachments: SOLR-8001.patch
>
>
> SOLR-2522 Introduced the ability to reference a multi-valued field with doc
> values in a function query (value source) such as like this (an example using
> it for sorting): {{sort=field(myMultiValField,min) asc}}. In the event that
> the document has no values for this field, this feature behaves nicely in the
> aforementioned example. And it does if you reference in a 'fl' (as a
> DocTransformer): {{fl=id,myMultiValField:field(myMultiValField,min)}}. In
> that case, the returned document simply doesn't have a name-value pair.
> *But*, if you sort on a more complex function that incorporates this, then
> you get an ArrayIndexOutOfBoundsException. Such as this:
> {{sort=sum(otherField,field(myMultiValField,min)) asc}} There may be other
> conditions where this same exception will be thrown; not sure.
> The root cause can either be considered one of two things (or both) I think:
> * The longVal, intVal, etc. methods on FunctionValues need to be prepared for
> the possibility that the document has no data, in which case it should return
> a default value. This means TrieLongField (& friends) are erroneous.
> * ValueSource.ValueSourceComparator could/should (?) call {{exists}} before
> calling {{doubleVal}} in the various methods where it does.
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