Question

How to detect end of file when reading a file using UTL_File ?

Asked by: tms_92

I have opened a file for reading using UTL_FILE.FOPEN , I am reading the lines one by one , I need to know how to find that it had reached end of file.
Similarly there are some empty lines between two lines of data.I mean lines created by pressing enter.How do I detect these lines.Please Help.

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Asked On
2003-04-25 at 23:04:18ID20596976
Tags

file

,

end

,

utl_file

,

detect

Topic

Oracle Database

Participating Experts
2
Points
20
Comments
4

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Answers

 

by: MergenPosted on 2003-04-26 at 03:45:53ID: 8400455

You should process NO_DATA_FOUND exception.
Some example:

DECLARE
  file_name UTL_FILE.FILE_TYPE;
  strbuffer VARCHAR2(100);
BEGIN
   //open file
  file_name:=UTL_FILE.FOPEN('H:\oracle81 \File','test5.txt','R');

//process file
  LOOP
      UTL_FILE.GET_LINE (file_name, strbuffer);
      DBMS_OUTPUT.PUT_LINE(strbuffer);
  END LOOP;
//if end of line not action
  EXCEPTION  WHEN NO_DATA_FOUND THEN NULL;

END;
/

 

by: JankoratPosted on 2003-04-26 at 08:02:40ID: 8401034

may be this will help


declare
             fileptr    utl_file.file_type;
             buffer    varchar2(2048);
             line_num number(10):=0;
             loc_no  integer;
     begin
             fileptr:=utl_file.fopen('F:\ORACLE\ADMIN','ABC.TXT','R');
             loop
                     line_num:=line_num+1;
                     utl_file.get_line(fileptr,buffer);
                     dbms_output.put_line(line_num||' '||buffer);
             end loop;
     exception
             when no_data_found then
                     utl_file.fclose(fileptr);
                     dbms_output.put_line('Number of lines parsed ='||line_num);
             when value_error then
                     dbms_output.put_line('value error');
                     raise_application_error(-20100,'file error');
             when utl_file.invalid_path  then
                     dbms_output.put_line('invalid path');
                     raise_application_error(-20100,'file error');
             when utl_file.invalid_mode  then
                     dbms_output.put_line('invalid_mode');
                     raise_application_error(-20100,'file error');
             when utl_file.invalid_filehandle  then
                     dbms_output.put_line('invalid_filehandle');
                     raise_application_error(-20100,'file error');
             when utl_file.invalid_operation  then
                     dbms_output.put_line('invalid_operation');
                     raise_application_error(-20100,'file error');
             when utl_file.read_error  then
                     dbms_output.put_line('read_error');
                     raise_application_error(-20100,'file error');
             when utl_file.write_error  then
                     dbms_output.put_line('write_error');
                     raise_application_error(-20100,'file error');
             when utl_file.internal_error  then
                     dbms_output.put_line('internal_error');
                     raise_application_error(-20100,'file error');
             when others then
                     dbms_output.put_line('un-handled');
                     raise_application_error(-20100,'file error');
     end;
     


utl_file.get_line function will retrive all text in the current line

20120131-EE-VQP-002

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