This blog gets more specific with some of the ideas behind the eval expression:
https://joelsolr.blogspot.com/2017/04/having-talk-with-solr-using-new-echo.html Joel Bernstein http://joelsolr.blogspot.com/ On Thu, Nov 19, 2020 at 12:21 PM Joel Bernstein <joels...@gmail.com> wrote: > You could have a program that writes a Streaming Expression > programmatically then use eval to run it. You can also save Streaming > Expression data structures: tuple, list, array etc... and eval them into > live streams that can be iterated. > > > > > Joel Bernstein > http://joelsolr.blogspot.com/ > > > On Wed, Nov 18, 2020 at 7:49 PM ufuk yılmaz <uyil...@vivaldi.net.invalid> > wrote: > >> Hey, >> >> Can anyone give me an example on how can eval >> https://lucene.apache.org/solr/guide/8_4/stream-decorator-reference.html#eval >> be used? >> >> Docs says it allows to run streaming expressions those created on the >> fly, but I can’t wrap my head on how an expression can be created on the >> fly, maybe unless it was stored in a field in Solr? >> >> Best >> >> Sent from Mail for Windows 10 >> >>