Utl_file - exception handling when inserted in bulk.

Question

Hi,
I am using Oracle 10gR2. I wanted to write data to a file. Due to huge number of records, I am collecting them into a collection, traversing e collection, appending the values in collection to a varchar variable with new line in a loop.If the array size is say 50, I will have 50 values in the Vatchar variable separated by CHR(10). and I will insert the variable using UTL_FILE.PUT so that 50 lines will be inserted with values into the file.
Now my query is if any one among those 50 values gives an exception, I feel all the 50 values can't be loaded. Please suggest exception handling in this case.
Regards,
Naveen Kumar.C.
Edited by: Naveen Kumar C on Sep 17, 2009 5:23 PM

Answer 1

You could use a CLOB in conjunction with UTL_FILE to write it out 32K at a time...
SQL> ed
Wrote file afiedt.buf
  1  DECLARE
  2    l_file    UTL_FILE.FILE_TYPE;
  3    l_clob    CLOB;
  4    l_buffer  VARCHAR2(32767);
  5    l_amount  BINARY_INTEGER := 32767;
  6    l_pos     INTEGER := 1;
  7  BEGIN
  8    BEGIN
  9      SELECT dbms_xmlgen.getxmltype('select * from emp natural join dept').getclobval()
10      INTO   l_clob
11      FROM   dual;
12    EXCEPTION
13      WHEN NO_DATA_FOUND THEN
14        RETURN;
15    END;
16    l_file := UTL_FILE.fopen('TEST_DIR', 'Sample2.txt', 'w', 32767);
17    LOOP
18      DBMS_LOB.read (l_clob, l_amount, l_pos, l_buffer);
19      UTL_FILE.put(l_file, l_buffer);
20      l_pos := l_pos + l_amount;
21    END LOOP;
22  EXCEPTION
23    WHEN NO_DATA_FOUND THEN -- occurs when end of CLOB reached
24      UTL_FILE.fclose(l_file);
25    WHEN OTHERS THEN
26      DBMS_OUTPUT.put_line(SQLERRM);
27      UTL_FILE.fclose(l_file);
28* END;
SQL> /
PL/SQL procedure successfully completed.
SQL>