Stored procedure to read the data from the BFILE into the clob clob and display the new clob contents. : bfilename « Large Objects « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. Large Objects
3. bfilename

SQL>
SQL> create table myTable
  2  (key NUMBER PRIMARY KEY
  3  ,col_blob BLOB
  4  ,col_clob CLOB);

Table created.

SQL>
SQL> INSERT INTO myTable (key, col_blob, col_clob)
  2  VALUES (1, HEXTORAW('101F'), 'ZYXW');

1 row created.

SQL>
SQL>
SQL> ALTER TABLE myTable add (col_bfile BFILE);

Table altered.

SQL>
SQL> CREATE OR REPLACE PROCEDURE sp_bfile_read
  2  IS
  3      v_fileloc   BFILE;
  4      v_col_clob  CLOB;
  5      v_filename  VARCHAR2(2000);
  6      v_amount    NUMBER := 80;
  7      v_offset    NUMBER := 1;
  8      v_buffer    VARCHAR2(80);
  9
 10      v_dir   VARCHAR2(80) := 'INFILE';
 11
 12  BEGIN
 13      v_fileloc := BFILENAME (v_dir, 'b_file.txt');
 14
 15      DBMS_LOB.FILEOPEN (v_fileloc, DBMS_LOB.FILE_READONLY);
 16
 17      SELECT col_clob
 18      INTO v_col_clob
 19      FROM myTable
 20      WHERE key = 2
 21      FOR UPDATE;
 22
 23      DBMS_LOB.LOADFROMFILE (v_col_clob, v_fileloc, DBMS_LOB.GETLENGTH (v_fileloc) );
 24      DBMS_LOB.READ (v_col_clob, v_amount, v_offset, v_buffer);
 25
 26      DBMS_OUTPUT.PUT_LINE (v_buffer);
 27
 28      DBMS_LOB.FILECLOSE (v_fileloc);
 29   EXCEPTION
 30      WHEN NO_DATA_FOUND THEN
 31      DBMS_LOB.FILECLOSEALL;
 32      RAISE_APPLICATION_ERROR(-20001, 'No data found!');
 33
 34      WHEN VALUE_ERROR THEN
 35      DBMS_LOB.FILECLOSEALL;
 36      RAISE_APPLICATION_ERROR(-20001, 'Value Error!');
 37
 38      WHEN DBMS_LOB.INVALID_ARGVAL THEN
 39      DBMS_LOB.FILECLOSEALL;
 40      RAISE_APPLICATION_ERROR(-20001, 'Read only mode not specified');
 41
 42      WHEN OTHERS THEN
 43      DBMS_LOB.FILECLOSEALL;
 44      RAISE_APPLICATION_ERROR(-20009, 'Other exception raised: ' || SQLCODE);
 45  END;
 46  /

Procedure created.

SQL>
SQL> exec sp_bfile_read



SQL>
SQL> drop table myTable;

Table dropped.

SQL>