1.确认现有对象
SQL col fdesc for a30
SQL select fid,fname,fdesc from eygle_blob;
FID FNAMEFDESC
---------- -------------------------------------------------- ------------------------------
1 ShaoLin.jpg少林寺-康熙手书
2 DaoYing.jpg倒映
2.创建存储Directory
SQL connect / as sysdba
Connected.
SQL create or replace directory BLOBDIR as 'D:\oradata\Pic';
Directory created.
SQL
SQL grant read,write on directory BLOBDIR to eygle;
Grant sUCceeded.
SQL
3.创建存储过程
SQL connect eygle/eygle
Connected.
SQL
SQL CREATE OR REPLACE PROCEDURE eygle_dump_blob (piname varchar2,poname varchar2) IS
2l_fileUTL_FILE.FILE_TYPE;
3l_bufferRAW(32767);
4l_amountBINARY_INTEGER := 32767;
5l_pos INTEGER := 1;
6l_blobBLOB;
7l_blob_lenINTEGER;
8BEGIN
9SELECT FPIC
10INTOl_blob
11FROMeygle_blob
12WHEREFNAME = piname;
13
14l_blob_len := DBMS_LOB.GETLENGTH(l_blob);
15l_file := UTL_FILE.FOPEN('BLOBDIR',poname,'wb', 32767);
16
17WHILE l_pos < l_blob_len LOOP
18DBMS_LOB.READ (l_blob, l_amount, l_pos, l_buffer);
19UTL_FILE.PUT_RAW(l_file, l_buffer, TRUE);
20l_pos := l_pos + l_amount;
21END LOOP;
22
23UTL_FILE.FCLOSE(l_file);
24
25EXCEPTION
26WHEN OTHERS THEN
27IF UTL_FILE.IS_OPEN(l_file) THEN
28UTL_FILE.FCLOSE(l_file);
29END IF;
30RAISE;
31END;
32/
Procedure created.
4.取出数据
SQL host ls -l d:\oradata\Pic
total 7618
-rwxrwxrwa 1 gqgai None2131553 Apr 19 10:12 DaoYing.jpg
-rwxrwxrwa 1 gqgai None1768198 Apr 19 10:12 ShaoLin.jpg
SQL exec eygle_dump_blob('ShaoLin.jpg','01.jpg')
PL/SQL procedure successfully completed.
SQL host ls -l d:\oradata\Pic
total 11072
-rwxrwxrwa 1 AdministratorsSYSTEM1768198 Apr 26 07:16 01.jpg
-rwxrwxrwa 1 gqgai None2131553 Apr 19 10:12 DaoYing.jpg
-rwxrwxrwa 1 gqgai None1768198 Apr 19 10:12 ShaoLin.jpg
SQL
SQL exec eygle_dump_blob('DaoYing.jpg','02.jpg')
PL/SQL procedure successfully completed.
SQL host ls -l d:\oradata\Pic
total 15236
-rwxrwxrwa 1 AdministratorsSYSTEM1768198 Apr 26 07:16 01.jpg
-rwxrwxrwa 1 AdministratorsSYSTEM2131553 Apr 26 07:19 02.jpg
-rwxrwxrwa 1 gqgai None2131553 Apr 19 10:12 DaoYing.jpg
-rwxrwxrwa 1 gqgai None1768198 Apr 19 10:12 ShaoLin.jpg
right"（出处：清风软件下载学院）
