You can check out Bistro [1] which is an alternative to SQL-like languages and to set-oriented approaches in general. It focuses on column operations (formally,

You can check out Bistro [1] which is an alternative to SQL-like languages and to set-oriented approaches in general. It focuses on column operations (formally, functions) as opposed to having only set operations. It is pricesely why it works well for time series and it is why it has been used for stream processing. [1] https://github.com/asavinov/bistro https://github.com/asavinov/bistro