Currently the gatherNodes expression can only be filtered by a traditional
filter query. I'm curious about the type of expression you are thinking of
filtering by?

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

On Wed, Jun 20, 2018 at 1:54 PM, Pratik Patel <pra...@semandex.net> wrote:

> We can limit the scope of graph traversal by applying some filter along the
> way as follows.
>
> gatherNodes(emails,
>             walk="john...@apache.org->from",
>             fq="body:(solr rocks)",
>             gather="to")
>
>
> Is it possible to replace "body:(solr rocks)" by some streaming expression
> like "search" function for example? Like as follows..
>
> gatherNodes(emails,
>             walk="john...@apache.org->from",
>             fq="search(...)", // use streaming expression as filter
>             gather="to")
>
>
>
> In my case, it would improve performance significantly if one can do that.
> Other approach I can think of is to save results of "search" streaming
> expression in some variable in pipeline and then use it at multiple places
> including "fq" clause of "gatherNodes". Is it possible to do something like
> this?
>

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