ContinuumIO/blaze — pull request #313 by mrocklin (2014-05-30 17:15:17+00:00)
Title: Add compute(Expr, DataDescriptor) implementation

Previously we would do

results = compute(expr, iter(csv_ddesc))

or

query = compute(expr, sql_ddesc.table)
with sql_ddesc.engine.connect() as conn:
results = conn.execute(query)

Now these are baked in so we just do

results = compute(expr, csv_ddesc)
results = compute(expr, sql_ddesc)

This is notationally convenient but organizationally tricky.

The left argument is from `blaze.expr`, the right is from `blaze.data`.
Historically these two haven't depended on each other.