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Posted to users@solr.apache.org by Daxesh Parmar <da...@gmail.com> on 2022/09/06 12:29:05 UTC
MultiLevel Collapse Supproted by Solr?
Hii, I wanted to know whether solr provides a feature to do a second
collapse on expanded results or not?
For my use case I am doing collapse of fieldA, and getting expandedResults.
I need the expanded results in such a way that all the values under fieldB
are present in expandedResults.
Eg. I am doing a collapse on MovieCategory, and each MovieCategory will
have a subcategory,
So how Can I ensure I get all Possible Subcategories in expanedResults.
(Can we do a second collapse on subCategories also?)
Thanks.
Daxesh.
Re: MultiLevel Collapse Supproted by Solr?
Posted by Joel Bernstein <jo...@gmail.com>.
Here is the jira that allowed for multiple collapse:
https://issues.apache.org/jira/browse/SOLR-14073
This was a bug fix. I don't think this was ever documented as a feature,
but it should work with Solr 8.5 and beyond.
Here is the follow-on work for expand:
https://issues.apache.org/jira/browse/SOLR-14329
Joel Bernstein
http://joelsolr.blogspot.com/
On Thu, Sep 8, 2022 at 1:21 AM Daxesh Parmar <da...@gmail.com>
wrote:
> Hii Joel, Thanks for the reply.
> But I was not able to find any official documentation stating multiple
> collapses. It would be helpful if you got any article about that.
> Also the second collapse would be on the main result set I believe. We
> can't do that on expanded results?
>
>
> On Tue, 6 Sept 2022 at 20:27, Joel Bernstein <jo...@gmail.com> wrote:
>
> > I believe this is supported on newer of Solr 8.5 and above. The expand
> > code has a specific comment that deals with multiple collapse fields:
> >
> > // if there are multiple collapse pick the low cost one
> > // if cost are equal then first one is picked
> >
> > So, you can specify a cost on the collapse filter which will control the
> > order of the collapse and select the expand field.
> >
> > There is also an undocumented expand parameter:
> >
> > expand.field
> >
> > This will allow you to specify which field to expand on.
> >
> > Collapse will support more than one collapse with versions Solr 8.5+.
> >
> > Joel Bernstein
> > http://joelsolr.blogspot.com/
> >
> >
> > On Tue, Sep 6, 2022 at 8:29 AM Daxesh Parmar <daxeshparmar0205@gmail.com
> >
> > wrote:
> >
> > > Hii, I wanted to know whether solr provides a feature to do a second
> > > collapse on expanded results or not?
> > > For my use case I am doing collapse of fieldA, and getting
> > expandedResults.
> > > I need the expanded results in such a way that all the values under
> > fieldB
> > > are present in expandedResults.
> > >
> > > Eg. I am doing a collapse on MovieCategory, and each MovieCategory
> will
> > > have a subcategory,
> > > So how Can I ensure I get all Possible Subcategories in expanedResults.
> > > (Can we do a second collapse on subCategories also?)
> > >
> > >
> > > Thanks.
> > > Daxesh.
> > >
> >
>
Re: MultiLevel Collapse Supproted by Solr?
Posted by Daxesh Parmar <da...@gmail.com>.
Hii Joel, Thanks for the reply.
But I was not able to find any official documentation stating multiple
collapses. It would be helpful if you got any article about that.
Also the second collapse would be on the main result set I believe. We
can't do that on expanded results?
On Tue, 6 Sept 2022 at 20:27, Joel Bernstein <jo...@gmail.com> wrote:
> I believe this is supported on newer of Solr 8.5 and above. The expand
> code has a specific comment that deals with multiple collapse fields:
>
> // if there are multiple collapse pick the low cost one
> // if cost are equal then first one is picked
>
> So, you can specify a cost on the collapse filter which will control the
> order of the collapse and select the expand field.
>
> There is also an undocumented expand parameter:
>
> expand.field
>
> This will allow you to specify which field to expand on.
>
> Collapse will support more than one collapse with versions Solr 8.5+.
>
> Joel Bernstein
> http://joelsolr.blogspot.com/
>
>
> On Tue, Sep 6, 2022 at 8:29 AM Daxesh Parmar <da...@gmail.com>
> wrote:
>
> > Hii, I wanted to know whether solr provides a feature to do a second
> > collapse on expanded results or not?
> > For my use case I am doing collapse of fieldA, and getting
> expandedResults.
> > I need the expanded results in such a way that all the values under
> fieldB
> > are present in expandedResults.
> >
> > Eg. I am doing a collapse on MovieCategory, and each MovieCategory will
> > have a subcategory,
> > So how Can I ensure I get all Possible Subcategories in expanedResults.
> > (Can we do a second collapse on subCategories also?)
> >
> >
> > Thanks.
> > Daxesh.
> >
>
Re: MultiLevel Collapse Supproted by Solr?
Posted by Joel Bernstein <jo...@gmail.com>.
I believe this is supported on newer of Solr 8.5 and above. The expand
code has a specific comment that deals with multiple collapse fields:
// if there are multiple collapse pick the low cost one
// if cost are equal then first one is picked
So, you can specify a cost on the collapse filter which will control the
order of the collapse and select the expand field.
There is also an undocumented expand parameter:
expand.field
This will allow you to specify which field to expand on.
Collapse will support more than one collapse with versions Solr 8.5+.
Joel Bernstein
http://joelsolr.blogspot.com/
On Tue, Sep 6, 2022 at 8:29 AM Daxesh Parmar <da...@gmail.com>
wrote:
> Hii, I wanted to know whether solr provides a feature to do a second
> collapse on expanded results or not?
> For my use case I am doing collapse of fieldA, and getting expandedResults.
> I need the expanded results in such a way that all the values under fieldB
> are present in expandedResults.
>
> Eg. I am doing a collapse on MovieCategory, and each MovieCategory will
> have a subcategory,
> So how Can I ensure I get all Possible Subcategories in expanedResults.
> (Can we do a second collapse on subCategories also?)
>
>
> Thanks.
> Daxesh.
>