lib/alf/algebra/operand.rb
module Alf
module Algebra
module Operand
def to_sql
cog = to_cog
if cog.respond_to?(:to_sql)
cog.to_sql
else
Alf::Sql::Compiler.new.call(self).to_sql
end
rescue NotSupportedError => ex
raise NotSupportedError, "Unable to compile `#{self}` to SQL"
end
end # module Operand
end # module Algebra
end # module Alf