Granting read/write permissions on Oracle Server processes

Question

Hi
I'm trying to set up a BFILE datatype in a table. I have created the directory and the current user has permissions to read and write to that folder. (The current user has the create any directory permission granted). The insert statement does not give an error but when I look at the table the BFILE column contains an error of <Value Error>.
I suspect it may be because the current user does not have server read/write permissions on the directory I'm using. Can anybody help me with a correcting this please?
Here is what I've used so far:
CREATE or replace DIRECTORY pic_dir AS 'c:\temp'
INSERT INTO picture (pic_id, filename)
VALUES (1, bfilename('pic_dir', 'image1.jpg'))

Answer 1

Many thanks for the reply.
I am using the procedure as below (formats better if copied into Notepad). Gives me an error of "ORA-22285: non-existent directory or file for FILEOPEN operation" referring to the line containing the DBMS_LOB.FILEOPEN command.
I suspect there is something wrong with the SELECT statement because I can get the procedure to run fine on the text file if I provide the BFILE location directly into the bfile_loc variable (as opposed to using the SELECT statement to retrieve it from the db).
I created a directory: CREATE OR REPLACE DIRECTORY pic_dir AS 'C:\temp'
I then created a table: CREATE TABLE picture (pic_id NUMBER, filename BFILE)
Next I added a row: INSERT INTO picture VALUES(1, BFILENAME('pic_dir', 'testfile.txt'))
CREATE OR REPLACE PROCEDURE read_bfile IS
sep_char CONSTANT RAW(100) := UTL_RAW.CAST_TO_RAW(CHR(32));      --separating character (space)
end_file CONSTANT RAW(100) := UTL_RAW.CAST_TO_RAW(CHR(10));      --end of file character (new line)
bfile_loc BFILE;                               --pointer to BFILE
cur_pos NUMBER := 1;                          --current position in file
char_read BINARY_INTEGER := 0;                     --number of characters read
read_buff VARCHAR2(500);                          --read buffer
end_word NUMBER;                              --end of current word
ret_val BOOLEAN := FALSE;                         --return value
BEGIN
select filename into bfile_loc from picture where pic_id = 1;
DBMS_LOB.FILEOPEN(bfile_loc, dbms_lob.file_readonly);
LOOP
-- establish end of current word
end_word := DBMS_LOB.INSTR(bfile_loc, sep_char, cur_pos, 1);
-- process end-of-file
IF (end_word = 0) THEN
end_word := DBMS_LOB.INSTR(bfile_loc, end_file, cur_pos, 1);
char_read:= end_word - cur_pos - 1;
DBMS_LOB.READ(bfile_loc, char_read, cur_pos, read_buff);
dbms_output.put_line(UTL_RAW.CAST_TO_VARCHAR2(read_buff));
EXIT;
END IF;
-- read until end-of-file
char_read:= end_word - cur_pos;
DBMS_LOB.READ(bfile_loc, char_read, cur_pos, read_buff);
dbms_output.put_line(UTL_RAW.CAST_TO_VARCHAR2(read_buff));
cur_pos := cur_pos + char_read+ 1;
END LOOP;
DBMS_LOB.CLOSE(bfile_loc);
END;