text: DROP TABLE t_fun_plsql;
  CREATE TABLE  t_fun_plsql
  ( id number,
    str varchar2(30)
  )
  /
  INSERT /* +APPEND */ INTO  t_fun_plsql
  SELECT ROWNUM, DBMS_RANDOM.STRING('X',20)
  FROM dual
  CONNECT BY  LEVEL <= 1000000
  /
  COMMIT
  /