gistfile1.rb

Class.new(ActiveSupport::LogSubscriber) do
  def sql(event)
    query = event.payload[:sql]
    if query.length > 10_000
      Rails.logger.info "Large query: #{query}"
      Rails.logger.info '!stacktrace!begin'
      Rails.logger.info Rails.backtrace_cleaner.clean(caller).join("\n")
      Rails.logger.info '!stacktrace!end'
    end
  end
end.attach_to :active_record