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From "Mikhail Khludnev (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (SOLR-9448) [subquery] calls another collection fails with "undefined field" or NPE from mergeIds
Date Wed, 10 Jan 2018 02:55:01 GMT

     [ https://issues.apache.org/jira/browse/SOLR-9448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mikhail Khludnev closed SOLR-9448.
----------------------------------

> [subquery] calls another collection fails with "undefined field" or NPE from mergeIds
> -------------------------------------------------------------------------------------
>
>                 Key: SOLR-9448
>                 URL: https://issues.apache.org/jira/browse/SOLR-9448
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: SolrCloud
>    Affects Versions: 6.1, 6.2
>            Reporter: Mikhail Khludnev
>            Assignee: Mikhail Khludnev
>             Fix For: 6.4, 7.0
>
>         Attachments: SOLR-9448.patch, SOLR-9448.patch, SOLR-9448.patch, SOLR-9448.patch
>
>
> If subquery collection has a different unique key field name (let's say {{foo_id}} is
different to {{id}} in primary collection), you've got {{NullPoniterException}} from {{QueryComponent.mergeIds()}}.
To accommodate the difference between uniqueKey field names between collections, add the following
parameters {{foo.fl=id:foo_id&foo.distrib.singlePass=true}}. The former one renames uniqueKey
field, the later switches to single pass search. There is no way to rename field in default
processing. 
> In a rare case when a collection under subquery has no unqueKey at all, it leads to something
like "undefined field", but it's not going to work anyway.



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