To Complete BLOB tutorial

Question

I’m trying to finish “Defining and Viewing BLOB Data in Oracle Application Express 3.1” within this week.
I’m wandering techniques to complete within 30 minutes.
Couple things blocked me to continue this tutorial.
1. Altering the Table to Add BLOB Data (step 21)
2. Viewing BLOB Data in a Report (step 16)
_?????????????Altering the Table to Add BLOB Data (step 21) ?????????????_
The download link produces a window that allows you to download a file but it doesn't say the name of the file or where it will be copied to. In the next section, you examine how to specify the parameters associated with the Photo column in a form and report.
$$$$$$$$$$$$$$$$$$$$$
The file is open in a separate window. It likes the step 14 of ‘Viewing BLOB Data in a Report”
_????????????? Viewing BLOB Data in a Report (step 16)???????????_
$$$$$$$$$$$$ I have following error message:
“OEHR_EMPLOYEES”.”MIMETYPE” not found

Answer 1

Hi
Example of the script
alter table "OEHR_EMPLOYEES" add
("PHOTO" BLOB NULL,
"FILENAME" VARCHAR2(255) NULL,
"MIMETYPE" VARCHAR2(255) NULL,
"LAST_UPDATE_DATE" DATE NULL)
set serverout on
CREATE OR REPLACE DIRECTORY photo_loc AS 'C:\temp';
create or replace
PROCEDURE update_lob
(p_file IN VARCHAR2, p_dir IN VARCHAR2)
IS
i_id NUMBER;
v_b BLOB;
BEGIN
DBMS_OUTPUT.ENABLE;
DBMS_OUTPUT.PUT_LINE('Begin updating row...');
update oehr_employees
set photo = EMPTY_BLOB(),
filename='dog.gif',
mimetype='image/gif'
where employee_id = 101
RETURNING photo into v_b;
loadLOBFromBFILE_proc(v_b,p_file, p_dir);
DBMS_OUTPUT.PUT_LINE('Row updated.');
COMMIT;
END update_lob;
CREATE OR REPLACE PROCEDURE loadLOBFromBFILE_proc
(p_dest_loc IN OUT BLOB, p_file_name IN VARCHAR2,
p_file_dir IN VARCHAR2)
IS
v_src_loc BFILE := BFILENAME(p_file_dir, p_file_name);
v_amount INTEGER := 4000;
BEGIN
DBMS_LOB.OPEN(v_src_loc, DBMS_LOB.LOB_READONLY);
v_amount := DBMS_LOB.GETLENGTH(v_src_loc);
DBMS_LOB.LOADFROMFILE(p_dest_loc, v_src_loc, v_amount);
DBMS_LOB.CLOSE(v_src_loc);
END loadLOBFromBFILE_proc;
execute update_lob('dog.gif', 'PHOTO_LOC')
Kind regards,
Iloon