A data flow language for hybrid query and programming languages

In this paper, we present trix, which formalizes the data flow mechanisms used in low level descriptions of algorithms that implement data base as well as programming constructs. We show that the data flow formalism permits concise expression of physical data base operators and functional evaluation, and that the formalism permits unified reasoning about the equivalence of programs of each and all of these paradigms. Specifically, we present trix formally, illustrate how programming patterns (specifically queries) translate into trix, and use "data flow equivalence" equational reasoning to show some common optimizations correct. Finally we show how the use of trix as an intermediate language can improve performance for some standard benchmarks.