class ConceptQL::Operators::Sum
Public Instance Methods
query(db)
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# File lib/conceptql/operators/sum.rb, line 17 def query(db) db.from(unioned(db)) .select_group(*(dynamic_columns - [:start_date, :end_date, :criterion_id, :value_as_number])) .select_append(Sequel.lit('?', 0).as(:criterion_id)) .select_append{ min(start_date).as(:start_date) } .select_append{ max(end_date).as(:end_date) } .select_append{sum(value_as_number).as(:value_as_number)} .from_self end
unioned(db)
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# File lib/conceptql/operators/sum.rb, line 27 def unioned(db) upstreams.map { |c| c.evaluate(db) }.inject do |uni, q| uni.union(q) end end