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joins.txt
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================================================================================
Join
================================================================================
from employees
join positions [employees.id==positions.employee_id]
--------------------------------------------------------------------------------
(program
(pipeline
(from
(keyword_from)
(identifier))
(transforms
(joins
(keyword_join)
(term
(identifier))
(conditions
(binary_expression
(field
(identifier)
(identifier))
(field
(identifier)
(identifier))))))))
================================================================================
Join with direction
================================================================================
from employees
join side:left positions [employees.id==positions.employee_id]
--------------------------------------------------------------------------------
(program
(pipeline
(from
(keyword_from)
(identifier))
(transforms
(joins
(keyword_join)
(keyword_side)
(keyword_left)
(term
(identifier))
(conditions
(binary_expression
(field
(identifier)
(identifier))
(field
(identifier)
(identifier))))))))
================================================================================
Joins with alias
================================================================================
from employees
join side:left p=positions [employees.id==p.employee_id]
--------------------------------------------------------------------------------
(program
(pipeline
(from
(keyword_from)
(identifier))
(transforms
(joins
(keyword_join)
(keyword_side)
(keyword_left)
(term
(identifier)
(identifier))
(conditions
(binary_expression
(field
(identifier)
(identifier))
(field
(identifier)
(identifier))))))))
================================================================================
Inner joins
================================================================================
from employees
join positions [==emp_no]
--------------------------------------------------------------------------------
(program
(pipeline
(from
(keyword_from)
(identifier))
(transforms
(joins
(keyword_join)
(term
(identifier))
(conditions
(term
(field
(identifier))))))))