Sha256: 73ae12dcdf912a8aba338209c7b606302051fbb4de9df914f56e1cb43f8523a5
Contents?: true
Size: 649 Bytes
Versions: 5
Compression:
Stored size: 649 Bytes
Contents
module Alf
module Algebra
class Join
include Operator
include Relational
include Binary
signature do |s|
end
def heading
@heading ||= left.heading + right.heading
end
def keys
@keys ||= begin
keys = []
left.keys.each do |k1|
right.keys.each do |k2|
keys << (k1 | k2)
end
end
Keys.new keys.uniq
end
end
private
def _type_check(options)
joinable_headings!(left.heading, right.heading, options)
end
end # class Join
end # module Algebra
end # module Alf
Version data entries
5 entries across 5 versions & 1 rubygems