Oracle Insert BLOB

全栈程序员-站长 • 2022年7月17日下午11:00 • 未分类 • 阅读 19

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来源于：

http://arjudba.blogspot.com/2008/06/how-to-insert-blob-dataimage-video-into.html

How to Insert Blob data(image, video) intooracle BLOB size

In this post it is shown how I can insert Blob data link image video into oracle database and also how I can determine the size of the BLOB data from oracle.

1)Create Directory Where BLOB resides.

create or replace directory temp as ‘/oradata2’;

2)Grant read permission to the user who work with this directory.

grant read on directory temp to arju;

3)Create the
Table which holds lob object.

— the storage table for the image file

CREATE TABLE pdm (

dname VARCHAR2(30), — directory name

sname VARCHAR2(30), — subdirectory name

fname VARCHAR2(30), — file name

iblob BLOB); — image file

4)Create the procedure that insert BLOB objects.

— create the procedure to load the file
CREATE OR REPLACE PROCEDURE load_file (
pdname VARCHAR2,
psname VARCHAR2,
pfname VARCHAR2) IS

src_file BFILE;
dst_file BLOB;
lgh_file BINARY_INTEGER;
BEGIN
src_file := bfilename(‘TEMP’, pfname);

— insert a NULL record to lock
INSERT INTO pdm
(dname, sname, fname, iblob)
VALUES
(pdname, psname, pfname, EMPTY_BLOB())
RETURNING iblob INTO dst_file;

— lock record
SELECT iblob
INTO dst_file
FROM pdm
WHERE dname = pdname
AND sname = psname
AND fname = pfname
FOR UPDATE;

— open the file
dbms_lob.fileopen(src_file, dbms_lob.file_readonly);

— determine length
lgh_file := dbms_lob.getlength(src_file);

— read the file
dbms_lob.loadfromfile(dst_file, src_file, lgh_file);

— update the blob field
UPDATE pdm
SET iblob = dst_file
WHERE dname = pdname
AND sname = psname
AND fname = pfname;

— close file
dbms_lob.fileclose(src_file);
END load_file;
/

5)Execute the Procedure.

SQL> exec load_file(‘TEMP’,’This is Image’,’tritha7.png’);

PL/SQL procedure successfully completed.

6) From OS see the BLOB size.

SQL> !ls -l /oradata2/tritha7.png

-rwxr-xr-x 1 oracle oinstall 21150 Jun 9 01:55 /oradata2/tritha7.png

7)From Oracle Determine Blob size.

1 declare
2 a blob;
3 begin
4 select iblob into a from pdm;
5 dbms_output.put_line(dbms_lob.getlength(a));
6* end;

SQL> /

PL/SQL procedure successfully completed.

SQL> set serverout on

SQL> /

21150

来源：
http://space.itpub.net/16860121/viewspace-717065

最近遇到好多需要存储Oracle BLOB 需求。众所周知，BLOB 是用来存储图片、PDF、等大数据对象的。由于公司的需要我们所有的数据库操作都要使用存储过程来操作。所以首先先贴上一个BLOB存储的存储过程供大家参考:

Sql代码

create or replace
procedure NDSSP_backup_fund (fund_id_in in varchar2 ,selector_in in varchar2,
time_in in timestamp,blob_in in BLOB)
is
key number;
blob_tmp blob;
begin
delete from fund_backup bf where bf.selector = selector_in and bf.fund_id = fund_id_in;
select fund_backup_seq.nextval into key from dual;
insert into fund_backup values(key,selector_in,fund_id_in,empty_blob(),time_in);
select content into blob_tmp from fund_backup where id = key for update;
dbms_lob.copy(blob_tmp, blob_in, dbms_lob.getLength(blob_in));
end NDSSP_backup_fund;