37. Update 0.5
update_sql = "UPDATE people set full_name ="
Person.where(full_name: nil).select("id,first_name,last_name").find_in_batches do |people|
People.transaction do
people.each(ActiveRecord::Base.connection_config[:pool]) do |person|
ActiveRecord::Base.connection_pool.with_connection do |conn|
set_full_name = conn.quote("#{person.first_name} #{person.last_name}")
conn.execute("#{update_sql} #{set_full_name} where id = #{person.id} ")
end
end
end
end