Cách tiếp tục vòng lặp while sau khi ngoại lệ được nêu ra trong SQL

Bằng cách nghịch mã, tôi đã phát hiện ra điều gì không ổn.
Tôi cần thêm dòng sau vào khối mã ngoại lệ của mình:

v_line := NULL; v_sr_no := v_sr_no + 1; 

Mã cuối cùng:

  DECLARE    
  v_blob_data       BLOB;    
  v_blob_len        NUMBER;    
  v_position        NUMBER;    
  v_raw_chunk       RAW(10000);    
  v_char      CHAR(1);    
  c_chunk_len   number       := 1;    
  v_line        VARCHAR2 (32767)        := NULL;    
  v_data_array      wwv_flow_global.vc_arr2;    
  v_rows number;    
  v_sr_no number := 1;  
  v_first_line_done boolean := false;  
  v_error_cd number :=0;  
  v_quote_pos1 NUMBER;  
  v_quote_pos2 NUMBER;  
  v_enclosed_str VARCHAR(200);
  v_errmsg VARCHAR2(4000);
BEGIN
  delete from TEMP_MM_UPDATE where username = :P1_USER_ID;

  -- Read data from wwv_flow_files</span>    
  select    
    blob_content    
    into v_blob_data    
    from wwv_flow_files    
    where name = :P2_FILE_UPLOAD; 

  v_blob_len := dbms_lob.getlength(v_blob_data);    
  v_position := 1; 

  -- Read and convert binary to char</span>  
  WHILE ( v_position <= v_blob_len )    
  LOOP 
    begin  
        v_raw_chunk := dbms_lob.substr(v_blob_data,c_chunk_len,v_position);    
        v_char :=  chr(hex_to_decimal(rawtohex(v_raw_chunk)));    
        v_line := v_line || v_char;    
        v_position := v_position + c_chunk_len;

      -- When a whole line is retrieved </span>   
      IF v_char = CHR(10) THEN
        LOOP  
          --Make sure there's something to replace  
          IF INSTR(v_line, '"', 1, 1) = 0 THEN  
            EXIT; -- If nothing to replace, exit loop and don't try  
          END IF;  
          --Find the position of the first and second quotes in the line of text  
          v_quote_pos1 := INSTR(v_line, '"', 1, 1);  
          v_quote_pos2 := INSTR(v_line, '"', 1, 2);  
          --Extract the inner string  
          v_enclosed_str := SUBSTR(v_line, v_quote_pos1 + 1, v_quote_pos2 - v_quote_pos1 - 1);  
          --perform the replacement  
          v_line := SUBSTR(v_line, 0, v_quote_pos1 - 1) || REPLACE(v_enclosed_str, ',', '<') || SUBSTR(v_line, v_quote_pos2 + 1);  
        END LOOP; 

        -- Convert comma to : to use wwv_flow_utilities </span>  
        v_line := REPLACE (v_line, ',', ':');  
        v_line := REPLACE (v_line, '<', ',');  
        v_line := REPLACE (trim(v_line), '-', NULL);  
        --v_line := REPLACE (trim(v_line), '"', NULL);  
        -- Convert each column separated by : into array of data </span>    
        v_data_array := wwv_flow_utilities.string_to_table (v_line);  
        --Check to see if the row of column headers has already been parsed through  
        IF(v_first_line_done != true)THEN   
          v_first_line_done := true;  
          --Check column order in spreadsheet  
          IF(v_data_array(1)    LIKE '%Username%' AND
              v_data_array(2)  LIKE '%NDN%' AND
              v_data_array(3)  LIKE '%PCFN%') THEN   
            v_error_cd := 0;  
            v_line := NULL;  
          ELSE  
            v_error_cd := 1;  
          END IF;  
        --If first line is done and the column order is correct then  
        ELSIF(v_first_line_done = true AND v_error_cd = 0) THEN   
          -- Insert data into target table </span>    
          EXECUTE IMMEDIATE 'insert into TEMP_MM_UPDATE   
          (USERNAME,
           RPT_FLAG,
           PCFN)
          values (:1,:2,:3)'   
           USING   
            v_data_array(1),   
            v_data_array(2),   
            v_data_array(3);    
           -- Clear out    
            v_line := NULL; v_sr_no := v_sr_no + 1; 
        END IF;  
      END IF;
    exception
      WHEN OTHERS then
        v_errmsg := SQLERRM;
        insert into temp_mm_update (username,error_desc)
        values (:P1_USER_ID, v_errmsg);
v_line := NULL; v_sr_no := v_sr_no + 1; 
  END;
  END LOOP;

  DELETE FROM WWV_FLOW_FILES where name = :P2_FILE_UPLOAD;
  DELETE FROM TEMP_MM_UPDATE WHERE USERNAME IS NULL AND PCFN IS NULL;  
  IF(v_error_cd = 1) THEN  
    INSERT INTO temp_mm_update (USERNAME, ERROR_DESC)  
    VALUES (:P1_USER_ID, 'Error. Please check column order in spreadsheet.');  
  END IF;
EXCEPTION
  WHEN NO_DATA_FOUND THEN
    insert into temp_mm_update (username,error_desc)
    values (:P1_USER_ID, 'No Data Found.');
  WHEN OTHERS then
    v_errmsg := SQLERRM;
    insert into temp_mm_update (username,error_desc)
    values (:P1_USER_ID, v_errmsg);
END;