class ConceptQL::Operators::Count

Public Instance Methods

query(db) click to toggle source
# File lib/conceptql/operators/count.rb, line 18
def query(db)
  db.from(unioned(db))
    .select_group(*(query_cols - [:value_as_number]))
    .select_append{count(1).as(:value_as_number)}
    .from_self
end
query_cols() click to toggle source
# File lib/conceptql/operators/count.rb, line 14
def query_cols
  dynamic_columns - [:value_as_number] + [:value_as_number]
end
unioned(db) click to toggle source
# File lib/conceptql/operators/count.rb, line 25
def unioned(db)
  upstreams.map { |c| c.evaluate(db) }.inject do |uni, q|
    uni.union(q)
  end
end