本文介绍了如何使用PL/SQL读取Oracle Directory的所有文件并更新BLOB列的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我需要读取Oracle目录的每个文件(不知道名称),如果文件名与PK表匹配,则用该文件更新BLOB列.
I need to read every files of a Oracle Directory (without knowing the name), and update a BLOB column with the file if the name of the file match with the PK table.
TABLE_PRUEBA
ID NUMBER(10,0) PK
FOTO BLOB NULL
我执行了PL/SQL函数,以读取一个文件(知道名称)并使用BLOB更新表,而BLOB可以正常工作.但是,我不知道如何在不知道文件名称的情况下读取每个文件.
I did a PL/SQL function to read one file (knowing the name) and update the table with the BLOB, which work correctly. But, I dont't know how I could read every file without knowing the name and take the name of the file.
DECLARE
l_blob BLOB;
v_src_loc BFILE := BFILENAME ('IMAGE_FILES8', '4.PNG');
v_amount INTEGER;
BEGIN
UPDATE TABLE_PRUEBA
SET FOTO = EMPTY_BLOB ()
WHERE ID = 4
RETURN FOTO
INTO l_blob;
DBMS_LOB.OPEN (v_src_loc, DBMS_LOB.LOB_READONLY);
v_amount := DBMS_LOB.GETLENGTH (v_src_loc);
DBMS_LOB.LOADFROMFILE (l_blob, v_src_loc, v_amount);
DBMS_LOB.CLOSE (v_src_loc);
COMMIT;
END;
推荐答案
看看这个网站,它说明了如何从目录中读取所有文件.
Take a look of this web, it explain how to read all file from directory.
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