How to extract blob from a table and save it as a file?

Question

Dear All
i have table employee (emp_id number , emp_name varchar2(60) emp_image blob)
1 - i want to extract the emp_image of every employee into a operating system folder c:\images
2 - the file name should be emp_id.gif or emp_id.jpg
How can i do that?
Thanks a lot in advance for your co-operation
Regards
Mohamed Hammed

Answer 1

I want to put an XML in a table's column using BLOBs.
I tried the following ways:
Created a table:
CREATE TABLE lob_table (id NUMBER, doc BLOB);
Created a directory:
create or replace directory XML_DIR as '\app\granite\rnd';
Created a PL/SQL procedure:
CREATE OR REPLACE
PROCEDURE BLOB_PROCEDURE AS
src_lob BFILE := BFILENAME('XML_DIR', '1.xml');
dest_lob BLOB;
BEGIN
DBMS_OUTPUT.PUT_LINE('1');
INSERT INTO lob_table VALUES(1, EMPTY_BLOB())
RETURNING doc INTO dest_lob;
DBMS_OUTPUT.PUT_LINE('2');
DBMS_LOB.OPEN(src_lob, DBMS_LOB.LOB_READONLY);
DBMS_OUTPUT.PUT_LINE('3');
DBMS_LOB.LoadFromFile( DEST_LOB => dest_lob,
SRC_LOB => src_lob,
AMOUNT => DBMS_LOB.GETLENGTH(src_lob) );
DBMS_OUTPUT.PUT_LINE('Done');
DBMS_LOB.CLOSE(src_lob);
Exception
when others then
DBMS_OUTPUT.PUT_LINE('Exception');
COMMIT;
END BLOB_PROCEDURE;
I am using Oracle SQL Developer.
When I try to run the above procedure, it says:
"Source does not have a runnable target."
When I use Toad, the procedure executes properly, but there is no blob data in the table.
Kindly help me in this regard.