Shulou(Shulou.com)05/31 Report--

This article introduces the knowledge of "how to understand the definer permissions and user permissions of the database". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations! I hope you can read it carefully and be able to achieve something!

I ran the following statement in HR mode (no error occurred):

CREATE TABLE plch_parts (partnum NUMBER, partname VARCHAR2 (50)) / BEGIN INSERT INTO plch_parts VALUES (123,' Steering Wheel'); INSERT INTO plch_parts VALUES (456,' Brake Pedal'); COMMIT;END;/CREATE OR REPLACE TYPE plch_numbers_t IS TABLE OF NUMBER/CREATE OR REPLACE FUNCTION plch_func RETURN plch_numbers_t AUTHID CURRENT_USERIS l_numbers plch_numbers_t;BEGIN SELECT partnum BULK COLLECT INTO l_numbers FROM plch_parts RETURN lumped numbers / GRANT SELECT ON plch_func_v TO scott/GRANT EXECUTE ON plch_func TO scott/ / create create number / GRANT SELECT ON plch_func_v TO scott/GRANT EXECUTE ON plch_func TO scott/

Then I connect to the SCOTT mode and execute the following statement:

CREATE TABLE plch_parts (partnum NUMBER, partname VARCHAR2 (50)) / BEGIN INSERT INTO plch_parts VALUES (100,' Tire'); INSERT INTO plch_parts VALUES (101,' Battery'); COMMIT;END;/

Which options show the output on the screen after the execution of the following statement blocks?

BEGIN DBMS_OUTPUT.put_line ('Two Cursor For Loops....'); FOR rec IN (SELECT p.partname FROM TABLE (hr.plch_func) v, plch_parts p WHERE v.column_value = p.partnum ORDER BY p.partnum) LOOP DBMS_OUTPUT.put_line (rec.partname); END LOOP FOR rec IN (SELECT p.partname FROM hr.plch_func_v v, plch_parts p WHERE v.partnum = p.partnum ORDER BY p.partnum) LOOP DBMS_OUTPUT.put_line (rec.partname); END LOOP;END;/

(A)

Two Cursor For Loops....Steering WheelBrake Pedal

(B)

An unhandled exception:PLS-00158: AUTHID CURRENT_USER subprograms not allowed in views

(C)

Two Cursor For Loops....TireBattery

(D)

Two Cursor For Loops....TireBatterySteering WheelBrake Pedal

(E)

Two Cursor For Loops....TireBatteryTireBattery

Measured answer C

SQL > BEGIN 2 DBMS_OUTPUT.put_line ('Two Cursor For Loops....'); 3 4 FOR rec IN (SELECT p.partname 5 FROM TABLE (yoga.plch_func) v, plch_parts p 6 WHERE v.column_value = p.partnum 7 ORDER BY p.partnum) 8 LOOP 9 DBMS_OUTPUT.put_line (rec.partname); 10 END LOOP 11 12 FOR rec IN (SELECT p.partname 13 FROM yoga.plch_func_v v, plch_parts p 14 WHERE v.partnum = p.partnum 15 ORDER BY p.partnum) 16 LOOP 17 DBMS_OUTPUT.put_line (rec.partname); 18 END LOOP; 19 END; 20 / Two Cursor For Loops....TireBatteryPL/SQL procedure successfully completedSQL >

Answer C.

A function defined as caller permission (AUTHID CURRENT_USER), if it is called in a VIEW or trigger, operates according to the definer's permission, so what you see through VIEW will be OWNER data, not the current user's data.

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