configure_connection

# File activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb, line 852
        def configure_connection
          if @config[:timeout]
            timeout = self.class.type_cast_config_to_integer(@config[:timeout])
            raise TypeError, "timeout must be integer, not #{timeout}" unless timeout.is_a?(Integer)
            @raw_connection.busy_handler_timeout = timeout
          end

          super

          pragmas = @config.fetch(:pragmas, {}).stringify_keys
          DEFAULT_PRAGMAS.merge(pragmas).each do |pragma, value|
            if ::SQLite3::Pragmas.method_defined?("#{pragma}=")
              @raw_connection.public_send("#{pragma}=", value)
            else
              warn "Unknown SQLite pragma: #{pragma}"
            end
          end
        end