Merging fields of two streaming expressions

[Gintautas Sulskus <gi...@gmail.com>]

Hi,

Is it possible to merge fields of two stream sources in a specific way?
Take for example two search result sets:

search_1(... fl="score")
search_2(... fl="score")

I would like to merge these two into one result set. Its score would be
computed using a custom function f(x,y) that takes take scores of search_1
and search_2 as its parameters.

The function can be, for example, the average of the two inputs e.g.
f=(x+y)/2


Using Solr 6.5.1


Thanks,
Gintas