>"I think you may underestimate the potential scope of a domain model and the capabilities of SQL."
I am being practical. There are many languages that are Turing complete but ill suited for particular domain. It's been proven that SQL is Turing complete as well. However should you propose using SQL to write implementation of say FFT you are not likely to find much of a sympathy.
I would not use SQL to implement the actual algorithm, but I would certainly consider using it to hold all of the data around such an operation as required. For instance, tables like Samples, Spectrograms, etc.
I am being practical. There are many languages that are Turing complete but ill suited for particular domain. It's been proven that SQL is Turing complete as well. However should you propose using SQL to write implementation of say FFT you are not likely to find much of a sympathy.