How to do filtering

[AntonOellerer]

Is your feature request related to a problem? Please describe.

After aggregation, I would like to only forward windows to the next stream where a certain condition holds.

Describe the solution you'd like

I think this could be done with a WHERE clause, but so far I have neither found documentation on it, nor been able to express this in the query language.

Describe alternatives you've considered

None, but as filtering is a listed feature, I am assuming there is some way to do this.
I also searched through the issues, but did not really find an answer.

Additional context

SpringQL helps you reduce data size by filtering, aggregation, and projection.

[laysakura]

I got your point.

We are planning to change programmers' interface from SQL-like language to Beam Model.
ref: #97

It may take a long time so please be patient.

[AntonOellerer]

Ok, thank you for the information!