SQL> CREATE TABLE CAN_NOT_INSERT(
   2                               X NUMBER
   3                              )
   4   /

Table created.

SQL> CREATE OR REPLACE
   2     PACKAGE GLOBAL
   3       IS
   4         TYPE ROWID_TABLE_TYPE IS TABLE OF ROWID INDEX BY BINARY_INTEGER;
   5         ROWID_TBL ROWID_TABLE_TYPE;
   6   END GLOBAL;
   7   /

Package created.

SQL> CREATE OR REPLACE
   2     TRIGGER CAN_NOT_INSERT_BIS
   3       BEFORE INSERT
   4       ON CAN_NOT_INSERT
   5       BEGIN
   6           GLOBAL.ROWID_TBL.DELETE;
   7   END CAN_NOT_INSERT_BIS;
   8   /

Trigger created.

SQL> CREATE OR REPLACE
   2     TRIGGER CAN_NOT_INSERT_AIR
   3       AFTER INSERT
   4       ON CAN_NOT_INSERT
   5       FOR EACH ROW
   6       BEGIN
   7           GLOBAL.ROWID_TBL(NVL(GLOBAL.ROWID_TBL.LAST, 0 ) +  1 ) := :NEW.ROWID;
   8   END CAN_NOT_INSERT_AIR;
   9   /

Trigger created.

SQL> CREATE OR REPLACE
   2     TRIGGER CAN_NOT_INSERT_AIS
   3       AFTER INSERT
   4       ON CAN_NOT_INSERT
   5       BEGIN
   6           FORALL I IN  1 ..GLOBAL.ROWID_TBL.LAST
   7             DELETE CAN_NOT_INSERT
   8               WHERE ROWID = GLOBAL.ROWID_TBL(I);
   9   END CAN_NOT_INSERT_AIS;
  10   /

Trigger created.

SQL> INSERT
   2     INTO CAN_NOT_INSERT
   3     VALUES(
   4             1 
   5           )
   6   /

 1  row created.

SQL> SELECT  *
   2     FROM  CAN_NOT_INSERT
   3   /

no rows selected

SQL> INSERT
   2     INTO CAN_NOT_INSERT
   3     SELECT  ROWNUM
   4       FROM USER_OBJECTS
   5   /

 83  rows created.

SQL> SELECT  *
   2     FROM  CAN_NOT_INSERT
   3   /

no rows selected