使用特殊字符将csv文件加载到Oracle apex中的表中

Question

我正在使用Apex 5将csv文件加载到Oracle中的表中。我的代码如下。

    The problem is when I have loaded the csv file, I noticed that is not inserting special characters like "á,é,í,ó,ú,ñ" . what can I do? 

For example if I have in csv file column "last_name" with  "Álvarez" value when I load the file into Oracle I see in the table " lvarez"

this csv file has more than 50 columns

声明     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布尔值：= false;
    v_error_cd NUMBER：= 0;     v_count NUMBER;

BEGIN



v_blob_len := dbms_lob.getlength(v_blob_data);    
v_position := 1;    
WHILE ( v_position <= v_blob_len )    
 LOOP    
 v_raw_chunk := dbms_lob.substr(v_blob_data,c_chunk_len,v_position);    
 v_char :=  chr(hex2dec(rawtohex(v_raw_chunk)));    
 v_line := v_line || v_char;    
 v_position := v_position + c_chunk_len;    
 IF v_char = CHR(10) THEN    
  --v_line := REPLACE (v_line, '|', ',');    
  v_data_array := wwv_flow_utilities.string_to_table (v_line,'|');  
IF v_sr_no = 1 THEN
null;
ELSE
APEX_DEBUG.MESSAGE(v_sr_no);



insert into TABLE_A(
     column1,
     column2,
     column3,
           .....    )
     values 
(v_data_array(1), v_data_array(2), v_data_array(3), ...... ); 
END IF;

COMMIT;

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

 END IF;    
 END LOOP;