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module Arel
class Take < Compound
attr_reader :taken
def initialize relation, taken
super(relation)
@taken = taken
end
def == other
super ||
Take === other &&
relation == other.relation &&
taken == other.taken
end
def engine
engine = relation.engine
# Temporary check of whether or not the engine supports where.
if engine.respond_to?(:supports) && !engine.supports(:limiting)
Memory::Engine.new
else
engine
end
end
def externalizable?
true
end
def eval
unoperated_rows[0, taken]
end
end
end
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