Seek help on If - then - else structure.

Question

I am not good at PL/SQL and need some advice on this stored procudure. This SP is usded to refresh materialized views. In the first block, check how many mvs in the user_mviews table and select it into v_2. IF v_2 = 25, go to 2nd block to run package_1.sp to refresh mvs and handle the exception within this block. ELSE v_2 <> 25, jump into 3rd block to run package_2.sp to drop all mvs and re-create them.
The exception also is handled within the block.
The SP compile successfully. When there is no mvs, SP will jump to 3rd block to re-create all mvs. After that, executing SP again, it will generate e_3, not go to 2nd block to refersh mvs. If mvs <> 25, it will also generate e_3. Please point out where I am coding wrong or something I missed here. Thanks in advance.
Here is sample SP:
CREATE OR REPLACE PROCEDURE sp_my_plsql
IS
v_1 user_mviews.owner%type;
v_2 number;
e_1 EXCEPTION;
e_2 EXCEPTION;
e_3 EXCEPTION;
v_ErrorCode number;
v_ErrorText varchar2 (100);
BEGIN
BEGIN --- 1st block
SELECT DISTINCT xxx
INTO v_1
FROM user_table;
SELECT COUNT(table_name)
INTO v_2
FROM USER_TABLES
WHERE USER = v_1 and TABLE_NAME 'XXX_%';
EXCEPTION
WHEN NO_DATA_FOUND THEN
DBMS_OUTPUT.PUT_LINE('EXCEPTION HANDLED');
END;
IF v_2 = 25 THEN
BEGIN ---- 2nd block
package-1.sp_1;
package_1.sp_2;
package_1.sp_3;
EXCEPTION
WHEN OTHERS THEN
RAISE e_3;
END;
ELSE
BEGIN ------3rd block
package_2.sp_1;
package_2.sp_2;
package_2.sp_3;
EXCEPTION
WHEN OTHERS THEN
RAISE e_3;
END;
END IF;
RAISE e_1;
RAISE e_2;
EXCEPTION
WHEN e_1 THEN
INSERT INTO log_table (error_dt, error_code, error_text, error_message) values (sysdate, null, null,' successful ');
WHEN e_3 THEN
v_ErrorCode := SQLCODE;
v_ErrorText := SUBSTR(SQLERRM, 1, 100);
INSERT INTO log_table (error_dt, error_code, error_text, error_message) values (sysdate, v_ErrorCode, v_ErrorText, 'Another Error ');
WHEN e_2 THEN
INSERT INTO log_table (error_dt, error_code, error_text, error_message) values (sysdate, null, null, ' Created');
COMMIT;
END;

Answer 1

> EXCEPTION
WHEN OTHERS THEN
RAISE e_3;
You are hiding the underlying error stack here. Say you hit an exception to do with insufficient privileges, corrupt index block or whatever, your code says to call that "e_3". Now you want to know what is causing e_3 exceptions. How about taking away the exception hider and letting it tell you?