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pipes.txt
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================================================================================
Pipes transforms
================================================================================
from employees | filter department == "Product" | select {first_name, last_name}
--------------------------------------------------------------------------------
(program
(pipeline
(from
(keyword_from)
(identifier))
(pipe)
(transforms
(filter
(keyword_filter)
(binary_expression
(field
(identifier))
(literal
(literal_string))))
(pipe)
(select
(keyword_select)
(term
(field
(identifier)))
(term
(field
(identifier)))))))
================================================================================
Pipes functions
================================================================================
let interp lower:0 higher x -> (x - lower) / (higher - lower)
from students
derive {
sat_proportion_1 = (sat_score | interp 1600),
sat_proportion_2 = (sat_score | interp lower:0 1600),
}
--------------------------------------------------------------------------------
(program
(function_definition
(keyword_let)
(identifier)
(parameter
(identifier)
(literal
(integer)))
(parameter
(identifier))
(parameter
(identifier))
(binary_expression
(binary_expression
(field
(identifier))
(field
(identifier)))
(binary_expression
(field
(identifier))
(field
(identifier)))))
(pipeline
(from
(keyword_from)
(identifier))
(transforms
(derives
(keyword_derive)
(term
(assignment
(field
(identifier))
(function_call
(identifier)
(pipe)
(parameter
(identifier))
(parameter
(literal
(integer))))))
(term
(assignment
(field
(identifier))
(function_call
(identifier)
(pipe)
(parameter
(identifier))
(parameter
(identifier)
(literal
(integer)))
(parameter
(literal
(integer))))))))))