No, it's the open source SPL above This is where SPL comes from. Its theoretical basis is no longer the relational algebra, but something called discrete datas

No, it's the open source SPL above This is where SPL comes from. Its theoretical basis is no longer the relational algebra, but something called discrete dataset. The formal language designed based on this new algebra is named SPL (structured process language). Innovations against the shortcomings of SQL have been made to SPL (more precisely, innovations against various deficiencies of relational algebra have been made to the discrete dataset). SPL redefines and extends many operations of structured data, specifically, it adds the discreteness, enhances ordered computation, implements a thorough set orientation, supports object references, and advocates stepwise operation.