Streaming api and multiValued fields

[chriseldredge <ch...@gmail.com>]

Is there any documentation on the support (or lack thereof) for using join,
hashJoin and other operations to combine streams on multiValued fields?

I have a core with posts that can be written about multiple companies, and
another core with info about those companies:

{
  'id': 'post-1234',
  'body': 'the body text about IBM and Oracle',
  'company_ids': [21, 43]
}

{
  'id': 'company-21',
  'company_id': 21,
  'name': 'IBM',
}

{
  'id': 'company-43',
  'company_id': 43,
  'name': 'Oracle'
}

I want to join posts to companies.

As an aside, this might not be possible yet before SOLR-8395 is completed
(query-time join (with scoring) for single value numeric fields) but I
thought I'd ask about multiValued fields anyway.



--
View this message in context: http://lucene.472066.n3.nabble.com/Streaming-api-and-multiValued-fields-tp4300058.html
Sent from the Solr - User mailing list archive at Nabble.com.

Re: Streaming api and multiValued fields

[Joel Bernstein <jo...@gmail.com>]

Currently the joins in the Streaming API don't support joining on
multi-value fields. It will be difficult to support merge joins on
multi-value fields but hash joins would be possible in the future. Also the
gatherNodes graph expression will support multi-value fields in the future.

Joel Bernstein
http://joelsolr.blogspot.com/

On Thu, Oct 6, 2016 at 4:52 PM, chriseldredge <ch...@gmail.com>
wrote:

> Is there any documentation on the support (or lack thereof) for using join,
> hashJoin and other operations to combine streams on multiValued fields?
>
> I have a core with posts that can be written about multiple companies, and
> another core with info about those companies:
>
> {
>   'id': 'post-1234',
>   'body': 'the body text about IBM and Oracle',
>   'company_ids': [21, 43]
> }
>
> {
>   'id': 'company-21',
>   'company_id': 21,
>   'name': 'IBM',
> }
>
> {
>   'id': 'company-43',
>   'company_id': 43,
>   'name': 'Oracle'
> }
>
> I want to join posts to companies.
>
> As an aside, this might not be possible yet before SOLR-8395 is completed
> (query-time join (with scoring) for single value numeric fields) but I
> thought I'd ask about multiValued fields anyway.
>
>
>
> --
> View this message in context: http://lucene.472066.n3.
> nabble.com/Streaming-api-and-multiValued-fields-tp4300058.html
> Sent from the Solr - User mailing list archive at Nabble.com.
>