ログを出力する（DS2言語）
put variable_name=;
https://go.documentation.sas.com/doc/ja/pgmsascdc/v_061/ds2ref/n1b5ndvbk83gctn1b0rjx7bokrip.htm
put variable_name=;
https://go.documentation.sas.com/doc/ja/pgmsascdc/v_061/ds2ref/n1b5ndvbk83gctn1b0rjx7bokrip.htm