Insert record in table having BLOB datatype

Question

Hi All,
I have a table with BLOB datatype, Pls assist me how to insert a record in this table?
CREATE TABLE document_BLOB_tab (
doc_id_no NUMBER
, doc_name VARCHAR2(200)
, doc_value BLOB);
What are the process to execute DBMS_LOB.fileOpen ?
Rgds
Sarfaraz

Answer 1

1- Create a table that has a list of all directory, filenames combination
SQL> create table listpic (directory varchar2(10), filename varchar2(10));
Table created.
2- Insert into that table all your directories and the filenames of the images within each
directory (directory, filename) combination
on my file system, I have
d:\tars\samples1\lilies.jpg
d:\tars\samples1\Sunset.jpg
d:\tars\samples2\Blue.jpg
d:\tars\samples1\Winter.jpg
Here is my insert statment
SQL> insert into listpic values('Samples1', 'lilies.jpg');
1 row created.
SQL> insert into listpic values('Samples1', 'Sunset.jpg');
1 row created.
SQL> insert into listpic values('Samples2', 'Blue.jpg');
1 row created.
SQL> insert into listpic values('Samples2', 'Winter.jpg');
1 row created.
SQL> commit;
Commit complete.
SQL> select * from listpic;
DIRECTORY FILENAME
Samples1 lilies.jpg
Samples1 Sunset.jpg
Samples2 Blue.jpg
Samples2 Winter.jpg
3- Create the table where you are going to store your pictures
SQL> create table pictures (id number(5), image blob);
Table created.
4- Create a directory pointing to the common parent Directory
SQL> create or replace directory IMAGES as 'd:\tars';
Directory created.
5- Create the following procedure to insert the image
SQL> set serveroutput on
SQL> create or replace procedure insert_image as
2 f_lob bfile;
3 b_lob blob;
4 i number := 1;
5 cursor image_cur is select directory, filename from listpic;
6 pic_rec image_cur%ROWTYPE;
7 begin
8
9 OPEN image_cur;
10 Loop
11 fetch image_cur into pic_rec;
12 EXIT WHEN image_cur%NOTFOUND;
13 insert into pictures values ( i, empty_blob() )
14 return image into b_lob;
15
16 f_lob := bfilename( 'IMAGES','\'||pic_rec.DIRECTORY||'\'||pic_rec.FILENAME);
17 dbms_lob.fileopen(f_lob, dbms_lob.file_readonly);
18 dbms_lob.loadfromfile( b_lob, f_lob, dbms_lob.getlength(f_lob) );
19 dbms_lob.fileclose(f_lob);
20 dbms_output.put_line (pic_rec.directory ||'\'||pic_rec.filename);
21 commit;
22 i := i+1;
23 END LOOP;
24 end;
25 /
Procedure created.
6- execute the procedure
SQL> exec insert_image;
Samples1\lilies.jpg
Samples1\Sunset.jpg
Samples2\Blue.jpg
Samples2\Winter.jpg
PL/SQL procedure successfully completed.
SQL> select count(*) from pictures;
COUNT(*)
4
SQL> select length(image) from pictures;
LENGTH(IMAGE)
83794
71189
28521
105542
Image has been uploaded to the dataabase.