How to save Image from Oracle form!!?

Question

Hello Every Oracle forms developer
i have a from contains block with Blob column ...i store image in it
i have used read_image_file to view image in form and insert it into DB 11gR2
now ..* I want to create procedure in form_button to download image from db ..and save it in local drive ...*
thanks in advance

Answer 1

see this example in pl/sql
DECLARE
-- Data Variables
v_blob BLOB;
v_data_length NUMBER;
-- Loop Control Variables
v_offset NUMBER := 1;
v_chunk CONSTANT NUMBER := 32767; -- maximum chunk size
-- UTL_FILE variables
fh UTL_FILE.file_type;
BEGIN
v_blob := ... populate the blob variable here
v_data_length := DBMS_LOB.getlength (v_blob);
-- Open the file
fh := UTL_FILE.fopen ('RETR_DIR', 'myfile.dat', 'wb', v_chunk);
LOOP
-- Exit when our file offset is bigger than our file
EXIT WHEN v_offset > v_data_length;
-- Write the output chunk by chunk
UTL_FILE.put_raw (fh, DBMS_LOB.SUBSTR (v_blob, v_chunk, v_offset), TRUE);
-- Increment the offset by the amount written
v_offset := v_offset + v_chunk;
END LOOP;
-- Close the file
UTL_FILE.fclose (fh);
END;
Regards