How to continue a loop after rear roller called a Transaction in SOA

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• Continue the loop after the exception thrown in SQL

  How would continue the while loop in the code below after an exception was thrown?

  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);
  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;
  
  

  When I set the exception inside the loop, as above, the procedure seems never to end, and I end up getting a 'NOWAIT' error when I try to remove the table or something like that.

  The code works fine if I remove the 'START' just after the loop and also out of the exception within the loop, but I want to be able to specify what's wrong with each record rather than deal with the correct records and then stop after that it is a record that has, for example, 9 values in a column that accepts only 6.

  Can anyone help with this?

  Thank you

  Steven

  Play with my code I found what was wrong.
  I needed to add in the following line in my code block of exception:

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

  Final code:

  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
    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
    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 
        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 
          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 
          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 
            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;
  

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  ---
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