下面是存储过程,但是写出来的图片跟原来的不一样,哪里不对???CREATE OR REPLACE PROCEDURE proc_export_blob (picname varchar2) IS
l_file UTL_FILE.FILE_TYPE;
l_buffer RAW(32767);
l_amount BINARY_INTEGER := 32767;
l_pos INTEGER := 1;
l_blob BLOB;
l_blob_len INTEGER;
BEGIN
SELECT pic INTO l_blob FROM unit WHERE id=1;
l_blob_len := DBMS_LOB.GETLENGTH(l_blob);
l_file := UTL_FILE.FOPEN('BLOBDIR',picname,'w',32767); WHILE l_pos < l_blob_len LOOP
DBMS_LOB.READ (l_blob, l_amount, l_pos, l_buffer);
UTL_FILE.PUT_RAW(l_file, l_buffer, TRUE);
l_pos := l_pos + l_amount;
END LOOP;
UTL_FILE.FCLOSE(l_file);
EXCEPTION
WHEN OTHERS THEN
IF UTL_FILE.IS_OPEN(l_file) THEN
UTL_FILE.FCLOSE(l_file);
END IF;
RAISE;
END proc_export_blob;
l_file := UTL_FILE.FOPEN('BLOBDIR',picname,'wb',32767);
这个我试过了啊,可是一执行存储过程就报错
ORA-29281 模式无效 难道跟版本有关系?我用的是9.2.0.1.0
文件模式打开错误吧!ORA-29281: invalid mode
Cause: An invalid value was specified for file open mode.
Action: Correct the mode to be one of the values: "r","a", or "w".
l_file UTL_FILE.FILE_TYPE;
l_buffer RAW(32767);
l_amount BINARY_INTEGER := 32767;
l_pos INTEGER := 1;
l_blob BLOB;
l_blob_len INTEGER;
BEGIN
SELECT pic INTO l_blob FROM unit WHERE id=1;
l_blob_len := DBMS_LOB.GETLENGTH(l_blob);
l_file := UTL_FILE.FOPEN('BLOBDIR',picname,'w'/*将w改成r或者a试试看*/,32767); --将w改成r或者a试试看 WHILE l_pos < l_blob_len LOOP
DBMS_LOB.READ (l_blob, l_amount, l_pos, l_buffer);
UTL_FILE.PUT_RAW(l_file, l_buffer, TRUE);
l_pos := l_pos + l_amount;
END LOOP;
UTL_FILE.FCLOSE(l_file);
EXCEPTION
WHEN OTHERS THEN
IF UTL_FILE.IS_OPEN(l_file) THEN
UTL_FILE.FCLOSE(l_file);
END IF;
RAISE;
END proc_export_blob;
l_file := UTL_FILE.FOPEN('BLOBDIR',picname,'wb'/*w应该为wb*/,32767);