ref: split up the expression crate #819
Merged
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This moves the traits for defining an expression evaluator into
sparrow-interfaces
and the code for executing a sequence of expressions intosparrow-expr-execution.
.This allows flattening the
sparrow-expressions
crate, and only using it as a test dependency in a wide variety of places. It is only needed at execution time.This is preparation for adding
sparrow-aggregations
to implement the stateful aggregations.