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# frozen_string_literal: true
module Gitlab
module SQL
# Class for building SQL INTERSECT statements.
#
# ORDER BYs are dropped from the relations as the final sort order is not
# guaranteed any way.
#
# Example usage:
#
# hierarchies = [group1.self_and_hierarchy, group2.self_and_hierarchy]
# intersect = Gitlab::SQL::Intersect.new(hierarchies)
# sql = intersect.to_sql
#
# Project.where("id IN (#{sql})")
class Intersect < SetOperator
def self.operator_keyword
'INTERSECT'
end
end
end
end
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