為了方便廣大考生更好的復習,幫考網綜合整理提供了微Oracle認證之ORACLEclob轉換成Blob類型,以供各位考生考試復習參考,希望對考生復習有所幫助。
ORACLEclob轉換成Blob類型
ORACLE 10G R2上
測試通過。
CREATE OR REPLACE FUNCTION C2B (b IN CLOB default empty_clob())
RETURN BLOB
-- typecasts BLOB to CLOB (binary conversion)
IS
res BLOB;
b_len number := dbms_lob.getlength(b) ;
dest_offset1 NUMBER := 1;
src_offset1 NUMBER := 1;
amount_c INTEGER := DBMS_LOB.lobmaxsize;
blob_csid NUMBER := DBMS_LOB.default_csid;
lang_ctx INTEGER := DBMS_LOB.default_lang_ctx;
warning INTEGER;
BEGIN
if b_len 》 0 then
DBMS_LOB.createtemporary (res, TRUE);
DBMS_LOB.OPEN (res, DBMS_LOB.lob_readwrite);
DBMS_LOB.convertToBlob (res,
b,
amount_c,
dest_offset1,
src_offset1,
blob_csid,
lang_ctx,
warning
);
else
select empty_blob() into res from dual ;
end if ;
RETURN res; -- res is OPEN here
END C2B;