Class: Alf::Algebra::Unwrap

Inherits:

Object

• Object
• Alf::Algebra::Unwrap

Includes:

Operator, Relational, Unary

Defined in:

lib/alf-algebra/alf/algebra/operator/unwrap.rb

Instance Attribute Summary

Attributes included from Operator

#operands

Attributes included from Support::Bindable

#connection

Instance Method Summary

• #heading ⇒ Object
• #keys ⇒ Object

Methods included from Operator

#==, #bind, #dup, included, #initialize, #signature, #to_lispy, #to_relvar, #with_operands

Methods included from Support::Registry

#each, #listen, #listeners, #register, #registered

Methods included from Operand

#attr_list, coerce, #to_cog, #to_dot, #to_relation

Methods included from Support::Bindable

#bind, #bound?, #connection!

Methods included from Relational

included

Methods included from Unary

included, #operand, #with_operand

Instance Method Details

#heading ⇒ Object

# File 'lib/alf-algebra/alf/algebra/operator/unwrap.rb', line 10

def heading
  @heading ||= begin
    op_h = operand.heading
    op_h.allbut([attribute]).merge(op_h[attribute].heading)
  end
end

#keys ⇒ Object

# File 'lib/alf-algebra/alf/algebra/operator/unwrap.rb', line 17

def keys
  operand.keys
end