Blob (bfile)+ ole2

hello gurus
i would like to know how is possible within Oracle Forms (i am still using 6i) to retrieve a MS office document stored in an oracle DB and showing it using ole2 automation.
I miss just the step of retrieving from DB and loading it into memory or somewhere on the client filesystem, so let it be opened with the right MS office application (chosen with ole2)
My actual idea is to create a block based on the table that stores the blob (bfile) column, but i don't know how to store the blob (bfile) object in the forms application.. there is a particular object to use? or i must just load the key (or rowid) and then requering the table using it? and after loading the blob (bfile) from table, how can i convert it to be usable for ole2?
thanks in advance!
claudio

Chapter 7 in the Oracle Call Interface Programmer's Guide discusses [LOB and BFILE operations|http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14250/oci07lob.htm#g452677]. Given that you are posting here, I assume you are interested in using the OCI interface and that you are familiar with the basics of OCI programming. If not, you'll want to read the other chapters in the OCI Programmer's Guide.
Justin

Similar Messages

BLOB, BFILE problems

We have tried different methods to get these data types to work in a PO8 environment. If we use the Oracle Navigator we can store and read blob data. When we try the same using JDBC 2.0 driver we can not get even the insert to work correctly. Has anyone ever been successful in getting it work. The samples of codes in many books don't seem to have been tested either because they don't work either!
For example, using the BFILE option (example given by Steve Bobowski)gave us a FILEOPEN exception ORA error 22285 (No directory exists or cannot open file). The directory and the file does exist and the user has the required permissions!
Any help?

Chapter 7 in the Oracle Call Interface Programmer's Guide discusses [LOB and BFILE operations|http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14250/oci07lob.htm#g452677]. Given that you are posting here, I assume you are interested in using the OCI interface and that you are familiar with the basics of OCI programming. If not, you'll want to read the other chapters in the OCI Programmer's Guide.
Justin

Help abt store and delete images as blob & bfile using Visual C++

Hi
Does anyone knows if there is code for visual c++
to store and delete images as blob or bfile?
thanx

The documentation states there are examples in the oracle database distribution: <ORACLE_HOME>/rdbms/demo/cdemolb.c <ORACLE_HOME>/rdbms/demo/cdemolb2.c <ORACLE_HOME>/rdbms/demo/cdemolbs.c
These examples are in c, but can be used in c++
http://otn.oracle.com/doc/server.815/a67846/app_exam.htm#430289

Using BLOB,BFILE

hello Gurus,
I want to know these two things
٭ How to use BLOB data type?
٭ How to use BFILE data type?
Regards
Santosh Kumar

Apart from what Raford mentioned, you should also keep in mind about the security aspect of it.
Documents stored in db are more secured or can be made more secured.
When you use bfiles, they are stored in OS and thus can be deleted intentionally or by mistake.
Performance wise, they donot make much difference even though bfile have an overhead of going to file system to fetch the fiiles/information.

How to use LOB/BLOB/BFILES

Hi,
How to Insert and Retrive LOB / BLOB data files into Oracle tables, give me an example.
Regards,
Paparao

Big topic. Big reading ahead. This document gives lots of explanations AND sample

BLOB vs BFILE

Dear Oracle Group,
Our applications are basically Client/Server and/or n-tier typical windows applications. The data is stored in Oracle 9i database on Solaris. Now..., I would like to store photographs and pdf documents in the database. I have read many documents on how to store jpegs and pdfs in Oracle database.
And I understand that I can store it in the database as a BLOB, BFILE or ORDSYS.OrdImage type column. But I have few problems here. My understanding is that, If I use BFILE or ORDSYS.OrdImage datatype, the image will be copied into the database server (Solaris), and we do not want the files to be copied into Solaris as an operating system file.
Please if you have any thoughts and/or samples share with me.
Thanks in advance,
Raja

Here is a C++ example using ORDImage
#include <iostream>
#include <fstream>
#include <occi.h>
#include <unistd.h>
#include <string>
using namespace oracle::occi;
using namespace std;
/* Buffer Size */
#define BUFSIZE 16384;
class occiImage
public:
string username;
string password;
string url;
void insertImageRow (Connection *conn, unsigned int id,
string descrip, string location, string fName)
throw (SQLException)
// Open input file to populate blob
ifstream inFile;
inFile.open(fName.data(), ios::in | ios::binary );
if (!inFile)
cout << fName; cout << " file not found\n";
return;
// Insert row into DB returning ID and blob to be populated
Statement *stmt = conn->createStatement
( "Insert into Photos t values \
(:v1, :v2, :v3, Ordimage.Init(), OrdImage.Init()) returning \
ROWID, t.image.getContent() into :v4, :v5");
stmt->setInt(1, id);
stmt->setString(2, descrip);
stmt->setString(3, location);
stmt->registerOutParam(4, OCCISTRING, 50);
stmt->registerOutParam(5, OCCIBLOB);
stmt->executeUpdate();
string rid = stmt->getString(4);
Blob blob = stmt->getBlob(5);
// Populate interMedia blob from file using stream interface
unsigned int bufsize=BUFSIZE;
char *buffer = new char[bufsize];
Stream *strm = blob.getStream();
while(inFile)
inFile.read((char *)buffer, bufsize);
strm->writeBuffer(buffer,inFile.gcount());
strm->writeLastBuffer(buffer, 0);
blob.closeStream(strm);
inFile.close();
delete[] buffer;
// In the same transaction, Set the image properties and create a thumbnail
stmt->setSQL
("DECLARE \
img ORDIMAGE; \
thumbnail ORDIMAGE; \
BEGIN \
select image, thumb into img, thumbnail from Photos \
where rowid = :v1 for update; \
img.setMimetype(:v2); \
BEGIN \
img.setProperties(); \
img.processCopy('fileFormat=JFIF maxScale=128 128', thumbnail); \
EXCEPTION WHEN OTHERS THEN thumbnail := NULL; \
END; \
update Photos set image=img, thumb=thumbnail where rowid = :v1; \
END;");
stmt->setString(1, rid);
// set default mime type based upon file Extension in
// case of setProperties failure (image/<FILE_EXTENSION>)
stmt->setString(2, "image/" + fName.substr(fName.find_last_of(".") + 1));
stmt->executeUpdate();
conn->commit();
conn->terminateStatement (stmt);
cout << "Populating and initializing the Image - Success" << endl;
return;
void writeThumbnailFile (Connection *conn, unsigned int id,
string fprefix)
throw (SQLException)
cout << "createStatement\n";
Statement *stmt = conn->createStatement
( "Select t.thumb.getContent(), t.thumb.getMimetype() from Photos t \
where t.id= :v1");
stmt->setInt(1, id);
ResultSet *rset = stmt->executeQuery ();
if (rset->next ())
Blob blob = rset->getBlob (1);
string mimeType = rset->getString(2);
string fName = fprefix + "." +
mimeType.substr(mimeType.find_last_of("/") + 1);
cout << "Output file name is " << fName << endl;
ofstream outFile;
outFile.open(fName.data() , ios::out | ios::binary);
if (!outFile)
cout << fName; cout << " file could not be created\n";
conn->terminateStatement (stmt);
return;
unsigned int bufsize=BUFSIZE;
char *buffer = new char[bufsize];
Stream *inStream = blob.getStream (1,0);
while (1)
int bytesRead = inStream->readBuffer(buffer, bufsize);
if (bytesRead < 0) break;
outFile.write(buffer, bytesRead);
blob.closeStream(inStream);
outFile.close();
delete[] buffer;
conn->commit();
conn->terminateStatement (stmt);
return;
occiImage ()
* default values of username & password
username = "scott";
password = "tiger";
url = "";
void setUsername (string u)
username = u;
void setPassword (string p)
password = p;
void setUrl (string u)
url = u;
void runImageSample ()
throw (SQLException)
Environment *env = Environment::createEnvironment (
Environment::DEFAULT);
Connection *conn = env->createConnection (username, password, url);
cout << "Start runImageSample\n";
insertImageRow (conn, 1, "picture", "somewhere", "image.dat");
writeThumbnailFile(conn, 1, "thumbnail");
env->terminateConnection (conn);
Environment::terminateEnvironment (env);
};//end of class occiImage
int main (void)
try
occiImage *i = new occiImage ();
i->setUsername ("scott");
i->setPassword ("tiger");
i->runImageSample ();
delete(i);
catch (exception &e)
cout << e.what();
}

Blob or Bfile?

Hi,
I need to store some pdf file (about 50kb each) into oracle 8.1.7. Which datatype (BLOB, BFILE) is better? As I understand BLOB is inside database, BFILE is outside database. And the number of records are about 6000 in about 3 years but all are critical data.
After I store the PDF file, I also need to retrive it back probally once or two times.
Thanks.
David

As i found Bfile is better cause all the images are stored outside the database. if there are no of images are to store the use bfile.
In other case Blob is also fine but in that case use bigger block size tablespace for storing the images.
Regards
Singh

Reading BFile datatype value to insert corresponding value into blob

Hi,
I have oracle 10.2.0 database.
I have this table with 3 columns of datatypes
TableA(id, Blob, BFile)
now i have pdf files stored in a directory for every id which ranges from 1 till 100.
for example for id=10, the pdf file name is cr10.pdf
except that for some id there is no correpsonding pdf's.
and i have a written a query where for a particular id, i link the corresponding pdf into the BFile. now is there a way where i can view the value of the bfile locator and find whether the bfile is null or not(i mean whether there is a pdf or not existing for that particular id)
what i need to do is, based on the bfile value i will insert the pdf into the blob column.
so based on the bfile value(ie whethe rthe pdf exisit or not) i will open the pdf and read the contents into the blob column.
and somehow i have figure out that a pdf is not exisiting based on the bfile value and then insert a null into the blob column instead of getting an error by trying to read a pdf which doesn't exist.
Can someone help me, how to find out existance of a file based on bfile value and insert value into blob.
I want this is script to be automated instead of checking manually a file exists or not.
Thanks,
Philip.

Hi,
I have oracle 10.2.0 database.
I have this table with 3 columns of datatypes
TableA(id, Blob, BFile)
now i have pdf files stored in a directory for every id which ranges from 1 till 100.
for example for id=10, the pdf file name is cr10.pdf
except that for some id there is no correpsonding pdf's.
and i have a written a query where for a particular id, i link the corresponding pdf into the BFile. now is there a way where i can view the value of the bfile locator and find whether the bfile is null or not(i mean whether there is a pdf or not existing for that particular id)
what i need to do is, based on the bfile value i will insert the pdf into the blob column.
so based on the bfile value(ie whethe rthe pdf exisit or not) i will open the pdf and read the contents into the blob column.
and somehow i have figure out that a pdf is not exisiting based on the bfile value and then insert a null into the blob column instead of getting an error by trying to read a pdf which doesn't exist.
Can someone help me, how to find out existance of a file based on bfile value and insert value into blob.
I want this is script to be automated instead of checking manually a file exists or not.
Thanks,
Philip.

Is there any convenient way to work with BFILE column in EJB 3.0 projects

Hi, all
Can anybody answer this simple question?
I know there is a special type - BFILEDomain in ADF BC, but what about EJB
any links and advices would be greatly appreciated.
Thanks in advance. Alex.

This (similar) issue was filed as bug #7315754 in our bug tracking system.
We do not support LOB, BLOB, BFILE datatypes as of now.
All types which we don't recognize currently default to a field of type String. This mainly serves as a placeholder field that the user can refactor
to any other desired type. Typically, when the JPA provider doesn't support the type, the field load/save operations can be managed, using hand-written
JDBC code, inside @PrePersist or @PostPersist methods.

Retrieve blob data

i have some hexadecimal data inserted into blob datatype column in a table and i want to retrieve it ........... i used hextoraw function but unable to retrieve it.......... i tried using the command ------------dbms_lob.getlength(hextoraw(A.DOCUMENT))----- as part of the select statement ...... but it is showing
ORA-00932: inconsistent datatypes: expected - got BLOB as error ........ plzzz help me out ....... here DOCUMENT is the blob datatype column in the table PSA_KNOWLEDGE_TREE
Edited by: the_reckoner on Oct 21, 2009 4:08 AM

Hello:
'dbms_lob.getlength' needs a clob/blob/bfile as its argument.
select dbms_lob.getlength(A.DOCUMENT) from PSA_KNOWLEDGE_TREE A - will return the length of the blob named DOCUMENT from the PSA_KNOWLEDGE_TREE
You can read more about working with LOBs at http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14249/adlob_working.htm#i1010368
Varad

How to Insert Image in a Column of a table

Hi
I have read several documentations but still could not find any relevant one that can help me in inserting a image in a BLOB column of a table.I have read about DBMS_LOB but still not clear how to insert an image in the table.
I followed following steps :
create table Emp_Identity(Id Number,Photo BLOB);
Insert Into Emp_Identity(1,'d:\vishal.bmp');
Please tell me steps to be followed.
Regards
Vishal Chaudhry
null

I am using Developer 2000 Forms 6i as Front End (Oracle 8.1.6)
My table structure is:
SQL> desc test_lob
Name Data Type
ID NUMBER
NAME VARCHAR2(100)
PHOTO BLOB
SOUND BINARY FILE LOB
IS there any way to display the BFILE contents on the frontend.....?
<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by vishal chaudhry ([email protected]):
Hi,
I could actually insert an image in a BLOB type column from the backend(Sql plus) not directly but by using BFILE and see that image on the frontend (Forms 6i Developer 2000,Item type is Image as there is nothing like BLOB/BFILE in front end) using the following procedure :
IS there any way I can insert an image directly in a BLOB column from the backend rather than using BFILE?
CREATE OR REPLACE PROCEDURE loadLOBFromBFILE_proc IS
Dest_loc BLOB;
Src_loc BFILE := BFILENAME('SOUND_DIR', '123w.bmp');
** SOUND_DIR is a logical directory created by giving path of the server
** Create Directory SOUND_DIR as 'd:\u020\o816\ctx\test'
** d:\u020\o816\ctx is the physical path of the server \\pslndb\ctx$
** test is the dummy testing directory created on the server
** 123w.bmp is lying in the test directory
Amount INTEGER ;
BEGIN
Amount := DBMS_LOB.GETLENGTH(Src_loc);
SELECT photo INTO Dest_loc FROM test_lob
WHERE ID = 1
FOR UPDATE;
/* Opening the source BFILE is mandatory: */
DBMS_LOB.OPEN(Src_loc, DBMS_LOB.LOB_READONLY);
/* Opening the LOB is optional: */
DBMS_LOB.OPEN(Dest_loc, DBMS_LOB.LOB_READWRITE);
DBMS_LOB.LOADFROMFILE(Dest_loc, Src_loc, Amount);
/* Closing the LOB is mandatory if you have opened it: */
DBMS_LOB.CLOSE(Dest_loc);
DBMS_LOB.CLOSE(Src_loc);
COMMIT;
END;
<HR></BLOCKQUOTE>
null

CASE STATEMENTS AND CASE EXPRESSIONS IN ORACLE9I PL/SQL

제품 : PL/SQL
작성날짜 : 2001-11-13
CASE STATEMENTS AND CASE EXPRESSIONS IN ORACLE9I PL/SQL
=======================================================
PURPOSE
아래의 자료는 Case 문에서 oracle 8.1.7과 Oracle 9i의 New Feature로 8.1.7에서는
sqlplus 에서만 가능했고, 9i 부터는 pl/sql 까지 가능하다.
Explanation
1. Oracle 8.1.7 Feature
Oracle 8.1.7 에서 Case 문은 Decode 문과 유사하지만, 기존의 decode 문을 쓰는 것보다
더 많은 확장성과 Logical Power와 좋은 성능을 제공한다. 주로 나이와 같이 category 별로
나눌때 주로 사용하고 Syntex는 아래와 같다.
CASE WHEN <cond1> THEN <v1> WHEN <cond2> THEN <v2> ... [ELSE <vn+1> ] END
각각의 WHEN...THEN 절의 argument 는 255 까지 가능하고 이 Limit를 해결하려면
Oracle 8i Reference를 참조하면 된다.
The maximum number of arguments in a CASE expression is 255, and each
WHEN ... THEN pair counts as two arguments. To avoid exceeding the limit of 128 choices,
you can nest CASE expressions. That is expr1 can itself be a CASE expression.
Case Example : 한 회사의 모든 종업원의 평균 봉급을 계산하는데 봉급이 $2000보다 작은경우
2000으로 계산을 하는 방법이 pl/sql을 대신하여 case function을 사용할 수 있다.
SELECT AVG(CASE when e.sal > 2000 THEN e.sal ELSE 2000 end) FROM emp e;
Case Example : 나이를 column으로 가지고 있는 customer table을 예로 들어보자.
SQL> SELECT
2 SUM(CASE WHEN age BETWEEN 70 AND 79 THEN 1 ELSE 0 END) as "70-79",
3 SUM(CASE WHEN age BETWEEN 80 AND 89 THEN 1 ELSE 0 END) as "80-89",
4 SUM(CASE WHEN age BETWEEN 90 AND 99 THEN 1 ELSE 0 END) as "90-99",
5 SUM(CASE WHEN age > 99 THEN 1 ELSE 0 END) as "100+"
6 FROM customer;
70-79 80-89 90-99 100+
4 2 3 1
1 SELECT
2 (CASE WHEN age BETWEEN 70 AND 79 THEN '70-79'
3 WHEN age BETWEEN 80 and 89 THEN '80-89'
4 WHEN age BETWEEN 90 and 99 THEN '90-99'
5 WHEN age > 99 THEN '100+' END) as age_group,
6 COUNT(*) as age_count
7 FROM customer
8 GROUP BY
9 (CASE WHEN age BETWEEN 70 AND 79 THEN '70-79'
10 WHEN age BETWEEN 80 and 89 THEN '80-89'
11 WHEN age BETWEEN 90 and 99 THEN '90-99'
12* WHEN age > 99 THEN '100+' END)
SQL> /
AGE_G AGE_COUNT
100+ 1
70-79 4
80-89 2
90-99 3
Example
2. Oracle 9i Feature
Oracle 9i부터는 pl/sql에서도 case문을 사용할 수 있으면 이것은
복잡한 if-else 구문을 없애고, C언어의 switch문과 같은 기능을 한다.
아래의 9i pl/sql Sample 및 제약 사항을 보면 아래와 같다.
Sample 1:
A simple example demonstrating the proper syntax for a case
statement
using a character variable as the selector. See the section entitled
'Restrictions' at the end of this article for details on which PLSQL
datatypes may appear as a selector in a case statement or
expression.
- - - - - - - - - - - - - - - - Code begins here - - - - - - - - - - - -
set serveroutput on
declare
achar char(1) := '&achar';
begin
case achar
when 'A' then dbms_output.put_line('The description was Excellent');
when 'B' then dbms_output.put_line('The description was Very Good');
when 'C' then dbms_output.put_line('The description was Good');
when 'D' then dbms_output.put_line('The description was Fair');
when 'F' then dbms_output.put_line('The description was Poor');
else dbms_output.put_line('The description was No such Grade');
end case;
end;
- - - - - - - - - - - - - - - - Code ends here - - - - - - - - - - - -
Sample 2:
A simple example demonstrating the proper syntax for a case
expression
using a character variable as the selector. See the section entitled
'Restrictions' at the end of this article for details on which PLSQL
datatypes may appear as a selector in a case statement or
expression.
- - - - - - - - - - - - - - - - Code begins here - - - - - - - - - - - -
set serveroutput on
declare
achar char(1) := '&achar';
description varchar2(20);
begin
description :=
case achar
when 'A' then 'Excellent'
when 'B' then 'Very Good'
when 'C' then 'Good'
when 'D' then 'Fair'
when 'F' then 'Poor'
else 'No such grade'
end;
dbms_output.put_line('The description was ' || description);
end;
- - - - - - - - - - - - - - - - Code ends here - - - - - - - - - - - -
NOTE: The above simple samples demonstrate two subtle differences in the
syntax
required for case statements and expressions.
1) A case STATEMENT is terminated using the 'end case' keywords; a
case
EXPRESSION is terminated using only the 'end' keyword.
2) Each item in a case STATEMENT consists of one or more
statements, each
terminated by a semicolon. Each item in a case expression
consists of
exactly one expression, not terminated by a semicolon.
Sample 3:
Sample 1 demonstrates a simple case statement in which the selector
is
compared for equality with each item in the case statement body.
PL/SQL
also provides a 'searched' case statement as an alternative; rather
than
providing a selector and a list of values, each item in the body of
the
case statement provides its own predicate. This predicate can be any
valid boolean expression, but only one case will be selected.
- - - - - - - - - - - - - - - - Code begins here - - - - - - - - - - - -
set serveroutput on
declare
achar char(1) := '&achar';
begin
case
when achar = 'A' then dbms_output.put_line('The description was
Excellent');
when achar = 'B' then dbms_output.put_line('The description was Very
Good');
when achar = 'C' then dbms_output.put_line('The description was
Good');
when achar = 'D' then dbms_output.put_line('The description was
Fair');
when achar = 'F' then dbms_output.put_line('The description was
Poor');
else dbms_output.put_line('The description was No such Grade');
end case;
end;
- - - - - - - - - - - - - - - - Code ends here - - - - - - - - - - - -
Sample 4:
This sample demonstrates the proper syntax for a case expression of
the
type discussed in Sample 3 above.
- - - - - - - - - - - - - - - - Code begins here - - - - - - - - - - - -
set serveroutput on
declare
achar char(1) := '&achar';
description varchar2(20);
begin
description :=
case
when achar = 'A' then 'Excellent'
when achar = 'B' then 'Very Good'
when achar = 'C' then 'Good'
when achar = 'D' then 'Fair'
when achar = 'F' then 'Poor'
else 'No such grade'
end;
dbms_output.put_line('The description was ' || description);
end;
- - - - - - - - - - - - - - - - Code ends here - - - - - - - - - - - -
Sample 5:
This sample demonstrates the use of nested case statements. It is
also
permissable to nest case expressions within a case statement (though
it
is not demonstrated here), but nesting of case statements within a
case
expression is not possible since statements do not return any value.
- - - - - - - - - - - - - - - - Code begins here - - - - - - - - - - - -
set serveroutput on
declare
anum1 number := &anum1;
anum2 number := &anum2;
answer number;
begin
case anum1
when 1 then case anum2
when 1 then answer := 10;
when 2 then answer := 20;
when 3 then answer := 30;
else answer := 999;
end case;
when 2 then case anum2
when 1 then answer := 15;
when 2 then answer := 25;
when 3 then answer := 35;
else answer := 777;
end case;
else answer := 555;
end case;
dbms_output.put_line('The answer is ' || answer);
end;
- - - - - - - - - - - - - - - - Code ends here - - - - - - - - - - - -
Sample 6:
This sample demonstrates nesting of case expressions within another
case
expression. Note again the absence of semicolons to terminate both
the
nested case expression and the individual cases of those
expressions.
- - - - - - - - - - - - - - - - Code begins here - - - - - - - - - - - -
set serveroutput on
declare
anum1 number := &anum1;
anum2 number := &anum2;
answer number;
begin
answer :=
case anum1
when 1 then case anum2
when 1 then 10
when 2 then 20
when 3 then 30
else 999
end
when 2 then case anum2
when 1 then 15
when 2 then 25
when 3 then 35
else 777
end
else 555
end;
dbms_output.put_line('The answer is ' || answer);
end;
- - - - - - - - - - - - - - - - Code ends here - - - - - - - - - - - -
Although PL/SQL anonymous blocks have been used in all of the examples
so far,
case statements and expressions can also be used in procedures,
functions, and
packages with no changes to the syntax.
The following samples are included for completeness and demonstrate the
use of
case statements and/or expressions in each of these scenarios.
Sample 7:
This sample demonstrates use of a case statement in a stored
procedure.
Note that this sample also demonstrates that it is possible for each
of
the items in the case body to consist of more than one statement.
- - - - - - - - - - - - - - - - Code begins here - - - - - - - - - - - -
set serveroutput on
create or replace procedure testcasestmt ( anum IN number ) is
begin
case
when anum = 1 then dbms_output.put_line('The number was One');
dbms_output.put_line('In case 1');
when anum = 2 then dbms_output.put_line('The number was Two');
dbms_output.put_line('In case 2');
when anum = 3 then dbms_output.put_line('The number was Three');
dbms_output.put_line('In case 3');
when anum = 4 then dbms_output.put_line('The number was Four');
dbms_output.put_line('In case 4');
when anum = 5 then dbms_output.put_line('The number was Five');
dbms_output.put_line('In case 5');
else dbms_output.put_line('The description was Invalid input');
dbms_output.put_line('In the else case');
end case;
end;
exec testcasestmt(&anum);
- - - - - - - - - - - - - - - - Code ends here - - - - - - - - - - - -
Sample 8:
This sample demonstrates the use of a case statement in a stored
package.
- - - - - - - - - - - - - - - - Code begins here - - - - - - - - - - - -
set serveroutput on
create or replace package testpkg2 is
procedure testcasestmt ( anum IN number );
function testcasestmt_f ( anum IN number ) return number;
end testpkg2;
create or replace package body testpkg2 is
procedure testcasestmt ( anum IN number ) is
begin
case
when anum = 1 then dbms_output.put_line('The number was One');
dbms_output.put_line('In case 1');
when anum = 2 then dbms_output.put_line('The number was Two');
dbms_output.put_line('In case 2');
when anum = 3 then dbms_output.put_line('The number was Three');
dbms_output.put_line('In case 3');
when anum = 4 then dbms_output.put_line('The number was Four');
dbms_output.put_line('In case 4');
when anum = 5 then dbms_output.put_line('The number was Five');
dbms_output.put_line('In case 5');
else dbms_output.put_line('The description was Invalid input');
dbms_output.put_line('In the else case');
end case;
end;
function testcasestmt_f ( anum IN number ) return number is
begin
case
when anum = 1 then dbms_output.put_line('The number was One');
dbms_output.put_line('In case 1');
when anum = 2 then dbms_output.put_line('The number was Two');
dbms_output.put_line('In case 2');
when anum = 3 then dbms_output.put_line('The number was Three');
dbms_output.put_line('In case 3');
when anum = 4 then dbms_output.put_line('The number was Four');
dbms_output.put_line('In case 4');
when anum = 5 then dbms_output.put_line('The number was Five');
dbms_output.put_line('In case 5');
else dbms_output.put_line('The description was Invalid input');
dbms_output.put_line('In the else case');
end case;
return anum;
end;
end testpkg2;
exec testpkg2.testcasestmt(&anum);
variable numout number
exec :numout := testpkg2.testcasestmt_f(&anum);
print numout
- - - - - - - - - - - - - - - - Code ends here - - - - - - - - - - - -
Sample 9:
This sample demonstrates the use of a case expression in a stored
package.
- - - - - - - - - - - - - - - - Code begins here - - - - - - - - - - - -
set serveroutput on
create or replace package testpkg is
procedure testcase ( anum IN number );
function testcase_f ( anum IN number ) return number;
end testpkg;
create or replace package body testpkg is
procedure testcase ( anum IN number ) is
anumber number := anum;
anothernum number;
begin
anothernum :=
case
when anumber = 1 then anumber + 1
when anumber = 2 then anumber + 2
when anumber = 3 then anumber + 3
when anumber = 4 then anumber + 4
when anumber = 5 then anumber + 5
else 999
end;
dbms_output.put_line('The number was ' || anothernum);
end;
function testcase_f ( anum IN number ) return number is
anumber number := anum;
anothernum number;
begin
anothernum :=
case
when anumber = 1 then anumber + 1
when anumber = 2 then anumber + 2
when anumber = 3 then anumber + 3
when anumber = 4 then anumber + 4
when anumber = 5 then anumber + 5
else 999
end;
dbms_output.put_line('The number was ' || anothernum);
return anothernum;
end;
end testpkg;
variable numout number
exec testpkg.testcase(&anum);
exec :numout := testpkg.testcase_f(&anum);
print numout
- - - - - - - - - - - - - - - - Code ends here - - - - - - - - - - - -
제약 사항
다음의 databasetype은 case 문에서 지원되지 않는다.
BLOB
BFILE
VARRAY
Nested Table
PL/SQL Record
PL/SQL Version 2 tables (index by tables)
Object type (user-defined type)
All of these types except for object types face a similar restriction
even for if statements (i.e. they cannot be compared for equality directly) so this is unlikely to change for these types. Lack of support for object types is simply an implementation restriction which may be relaxed in future releases.
Reference Ducumment
Oracle 8.1.7 Manual
NOTE:131557.1

I have done the following code but doesn't
like the statement of - "case(butNext)". What do you mean "doesn't like" -- did you get an error message?
I'm guessing it won't compile because you're trying to switch on a Button.
I tried something
like "g.fillOval(100,50,70,90, BorderLayout.NORTH)"...no that doesn't make sense. You only use BorderLayout.NORTH when you're adding components to a BorderLayout layout manager. An oval is not a component and fillOval isn't adding a component and Graphics is not a Panel or layout manager.
Would appreciate it if someone could tell me how to position
shapes using the graohic method. I think the problem is that you're confusing shapes with components.

Most robust way to preserve data insert into CLOB?

Hello.
When inserting data into a CLOB column, some of the characters are not being preserved, such as ellipsis characters and other unusual characters. The data is being inserted via JDBC as a simple Java string sql statement in a Statement object. So, what is the most appropriate way to insert information into a CLOB such that all characters are preserved? (Do I have to use PreparedStatements or Clob.setString()?)
For example, the following sql insert:
"INSERT INTO t1 (myClob) VALUES ('Hello ... how are you?');"
Will end up inserting something like:
"Hello ? how are you?"
The ellipsis character (Unicode U+2026, I believe) is changed to something else. How can I preserve this and other characters? Thanks in advance.

Hi,
Must have something to do with NCHAR or Unicode characters.
Here are the notes i put in chapter 8 of my book, section 8.2.2
Notes:
Pre-10.2 JDBC does not support NCHAR literal (n'...') containing
Unicode characters that cannot be represented in the database character
set.
Using 10.2 JDBC against 10.2 RDBMS, NCHAR literals (n'...')
are converted to Unicode literals (u'...'); non-ASCII characters
are converted to their corresponding Unicode escape sequence.
Using 10.2 JDBC against pre-10.2 RDBMS, NCHAR literals (n'...') are
not converted and generate undetermined content for characters that
cannot be represented in the database character set.
Fwiw, here is my blog entry relative to Lobs (CLOB, BLOB, BFILE) :
http://db360.blogspot.com/2006/11/get-bolder-with-lobs-manipulation-in.html
Kuassi, http://db360.blogspot.com/2006/08/oracle-database-programming-using-java_01.html

PRO*C에서 EMBEDDED SQL STATEMENTS를 사용해서 LOB DATATYPES에 접근하는 예제

제품 : PRECOMPILERS
작성날짜 : 2001-07-12
PRO*C에서 EMBEDDED SQL STATEMENTS를 사용해서 LOB DATATYPES에 접근하는 예제
==========================================================================
Pro*C에서 LOB를 사용하는 방법에는 다음 3가지가 있습니다.
(1) PL/SQL blocks에서 DBMS_LOB package를 이용하는 방법
(2) OCI function을 이용하는 방법
(3) Embedded SQL statements을 이용하는 방법
다음은 (3)번째 방법에 대한 pro*c에서 지원하는 명령어들입니다.
o APPEND: Appends lob value at the end of another LOB.
EXEC SQL LOB APPEND :src TO :dst;
o ASSIGN: Assigns LOB or BFILE locator to another.
EXEC SQL LOB ASSIGN :src TO :dst;
o CLOSE: Close LOB or BFILE.
EXEC SQL LOB CLOSE :src;
o COPY: Copy all or part of LOB value into another LOB.
EXEC SQL LOB COPY :amt FROM :src [AT :src_offset] TO :dst [AT dst_offset];
o CREATE TEMPORARY: Creates a temporary LOB.
EXEC SQL LOB CREATE TEMPORARY :src;
o ERASE: Erase the given amount of LOB data starting from a given offset.
EXEC SQL LOB ERASE :amt FROM :src [AT :src_offset];
o FILE CLOSE ALL: Closes all the BFILES open in the current session.
EXEC SQL LOB FILE CLOSE ALL;
o FILE SET: Set DIRECTORY alias and FILENAME in a BFILE locator.
EXEC SQL LOB FILE SET :file DIRECTORY = :alias, FILENAME = :filename;
o FREE TEMPORARY: Free the temporary space for the LOB locator.
EXEC SQL LOB FREE TEMPORARY :src
o LOAD FROM FILE: Copy all or part of BFIL into an internal LOB.
EXEC SQL LOB LOAD :amt FROM FILE :file [AT :src_offset]
INTO :dst [AT :dst_offset];
o OPEN: Open a LOB or BFILE for read or read/write.
EXEC SQL LOB OPEN :src [ READ ONLY | READ WRITE ];
o READ: Reads all or part of LOB or BFILE into a buffer.
EXEC SQL LOB READ :amt FROM :src [AT :src_offset]
INTO :buffer [WITH LENGTH :buffer];
o TRIM: Truncates the LOB vlaue.
EXEC SQL LOB TRIM :src to :newlen;
o WRITE: Writes contents of the buffer to a LOB.
EXEC SQL LOB WRITE [APPEND] [FIRST | NEXT | LAST | ONE ]
:amt FROM :buffer [WITH LENGTH :buflen] INTO :dst [AT :dst_offset];
o DESCRIBE: Retrieves the attributes from a LOB.
EXEC SQL LOB DESCRIBE :src GET attribute1 [{, attributeN}]
INTO :hv1 [[INDICATOR] :hv_ind1] [{, :hvN [[INDICATOR] :hv_indN] }];
Attributes can be any of the following:
CHUNKSIZE: chunk size used to store the LOB value
DIRECTORY: name of the DIRECTORY alias for BFILE
FILEEXISTS: whether BFILE exists or not
FILENAME: BFILE name
ISOPEN: whether BFILE with this locate is OPEN or not
ISTEMPORARY: whether specified LOB is temporary or not
LENGTH: Length of BLOBs and BFILE in bytes, CLOBs and NCLOBs
in characters.
다음은 LOB를 사용하는 sample을 실행하는 방법입니다.
1. 먼저 scott user에서 다음을 실행합니다. (create directory를 할 수 있는 권한이
있어야 하며, directory는 사용하시는 환경에 맞도록 수정해 주십시요.)
drop table lob_table;
create table lob_table (key number, a_blob BLOB, a_clob CLOB);
drop table lobdemo;
create table lobdemo (key number, a_blob BLOB, a_bfile BFILE);
drop directory dir_alias;
create directory dir_alias as '/users/app/oracle/product/8.1.7/precomp/demo/proc';
insert into lob_table values(1, utl_raw.cast_to_raw('1111111111'), 'aaaaaaaa');
commit;
2. 다음 코드는 out.gif 파일을 위에서 지정한 directory에 만들고 lob_table의
내용에 들어있는 BLOB의 내용을 저장하는 sample입니다.
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sqlda.h>
#include <sqlcpr.h>
/* Define constants for VARCHAR lengths. */
#define UNAME_LEN 20
#define PWD_LEN 40
/* Declare variables. No declare section is
needed if MODE=ORACLE. */
VARCHAR username[UNAME_LEN]; /* VARCHAR is an Oracle-supplied struct */
varchar password[PWD_LEN]; /* varchar can be in lower case also. */
/* The following 3 lines avoid inclusion of oci.h during precompilation
oci.h is needed only during compilation to resolve calls generated by
the precompiler
#ifndef ORA_PROC
#include <oci.h>
#endif
#include <sqlca.h>
OCIBlobLocator *blob;
OCIClobLocator *clob;
FILE *fp;
unsigned int amt, offset = 1;
#define MAXBUFLEN 5000
unsigned char buffer[MAXBUFLEN];
EXEC SQL VAR buffer IS RAW(MAXBUFLEN);
/* Declare error handling function. */
void sql_error(msg)
char *msg;
char err_msg[128];
size_t buf_len, msg_len;
EXEC SQL WHENEVER SQLERROR CONTINUE;
printf("\n%s\n", msg);
buf_len = sizeof (err_msg);
sqlglm(err_msg, &buf_len, &msg_len);
printf("%.*s\n", msg_len, err_msg);
EXEC SQL ROLLBACK RELEASE;
exit(EXIT_FAILURE);
void main()
/* Connect to ORACLE--
* Copy the username into the VARCHAR.
strncpy((char *) username.arr, "SCOTT", UNAME_LEN);
/* Set the length component of the VARCHAR. */
username.len =
(unsigned short) strlen((char *) username.arr);
/* Copy the password. */
strncpy((char *) password.arr, "TIGER", PWD_LEN);
password.len =
(unsigned short) strlen((char *) password.arr);
/* Register sql_error() as the error handler. */
EXEC SQL WHENEVER SQLERROR DO sql_error("ORACLE error--\n");
/* Connect to ORACLE. Program will call sql_error()
* if an error occurs when connecting to the default database.
EXEC SQL CONNECT :username IDENTIFIED BY :password;
printf("\nConnected to ORACLE as user: %s\n", username.arr);
/* Allocate the LOB host variables and select the BLOB value */
EXEC SQL ALLOCATE :blob;
EXEC SQL ALLOCATE :clob;
EXEC SQL SELECT a_blob INTO :blob FROM lob_table WHERE key=1;
/* Open external file to which BLOB value should be written */
fp = fopen("out.gif", "w");
EXEC SQL WHENEVER NOT FOUND GOTO end_of_lob;
amt = 5000;
EXEC SQL LOB READ :amt FROM :blob AT :offset INTO :buffer;
fwrite(buffer, MAXBUFLEN, 1, fp);
EXEC SQL WHENEVER NOT FOUND DO break;
/* Use polling method to continue reading the next pieces */
while (TRUE)
EXEC SQL LOB READ :amt FROM :blob INTO :buffer;
fwrite(buffer, MAXBUFLEN, 1, fp);
end_of_lob:
fwrite(buffer, amt, 1, fp);
printf("\nG'day.\n\n\n");
/* Disconnect from ORACLE. */
EXEC SQL ROLLBACK WORK RELEASE;
exit(EXIT_SUCCESS);
3. 다음 코드는 위에서 만든 out.gif file을 lobdemo에 저장하는 sample입니다.
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sqlda.h>
#include <sqlcpr.h>
/* Define constants for VARCHAR lengths. */
#define UNAME_LEN 20
#define PWD_LEN 40
/* Declare variables. No declare section is
needed if MODE=ORACLE. */
VARCHAR username[UNAME_LEN]; /* VARCHAR is an Oracle-supplied struct */
varchar password[PWD_LEN]; /* varchar can be in lower case also. */
/* The following 3 lines avoid inclusion of oci.h during precompilation
oci.h is needed only during compilation to resolve call generated by
the precompiler
#ifndef ORA_PROC
#include <oci.h>
#endif
#include <sqlca.h>
OCIBlobLocator *blob;
OCIBFileLocator *bfile;
char *alias = "DIR_ALIAS";
char *filename = "out.gif";
unsigned int amt = 50;
unsigned int filelen;
/* Declare error handling function. */
void sql_error(msg)
char *msg;
char err_msg[128];
size_t buf_len, msg_len;
EXEC SQL WHENEVER SQLERROR CONTINUE;
printf("\n%s\n", msg);
buf_len = sizeof (err_msg);
sqlglm(err_msg, &buf_len, &msg_len);
printf("%.*s\n", msg_len, err_msg);
EXEC SQL ROLLBACK RELEASE;
exit(EXIT_FAILURE);
void main()
/* Connect to ORACLE--
* Copy the username into the VARCHAR.
strncpy((char *) username.arr, "SCOTT", UNAME_LEN);
/* Set the length component of the VARCHAR. */
username.len =
(unsigned short) strlen((char *) username.arr);
/* Copy the password. */
strncpy((char *) password.arr, "TIGER", PWD_LEN);
password.len =
(unsigned short) strlen((char *) password.arr);
/* Register sql_error() as the error handler. */
EXEC SQL WHENEVER SQLERROR DO sql_error("ORACLE error--\n");
/* Connect to ORACLE. Program will call sql_error()
* if an error occurs when connecting to the default database.
EXEC SQL CONNECT :username IDENTIFIED BY :password;
printf("\nConnected to ORACLE as user: %s\n", username.arr);
/* Allocate the LOB locator */
EXEC SQL ALLOCATE :blob;
EXEC SQL ALLOCATE :bfile;
/* Initialize the DIRECTORY alias of the BFILE and FILENAME */
EXEC SQL LOB FILE SET :bfile
DIRECTORY = :alias, FILENAME = :filename;
EXEC SQL INSERT INTO lobdemo values (1, EMPTY_BLOB(), :bfile);
EXEC SQL SELECT a_blob, a_bfile INTO :blob, :bfile FROM lobdemo
WHERE key = 1;
EXEC SQL LOB OPEN :bfile;
/* Get the BFILE length */
EXEC SQL LOB DESCRIBE :bfile
GET LENGTH INTO :filelen;
printf("File length is: %d\n", filelen);
amt = filelen;
/* Read BFILE and write to BLOB */
EXEC SQL LOB LOAD :amt FROM FILE :bfile INTO :blob;
EXEC SQL LOB CLOSE :bfile;
printf("\nG'day.\n\n\n");
/* Disconnect from ORACLE. */
EXEC SQL COMMIT WORK RELEASE;
exit(EXIT_SUCCESS);
4. 다음은 실행한 결과 입니다.
첫번째 sample :
Connected to ORACLE as user: SCOTT
G'day.
두번째 sample :
Connected to ORACLE as user: SCOTT
File length is: 10
G'day.

NoSQL + SQL LOBs

Hello, everyone!
I have one question about Oracle NoSQL. It can store huge ammount of data and operate it using oracle.kv.lob package.
It can also translate data to a common relational Oracle Database 11gR2 using External Tables mechanism.
But combining these two mechanisms getting me a big trouble.
In ideal way I want to write:
SELECT PK, oracle_BLOB
FROM NoSQL_ExternalTable
WHERE PK in (<list of integer>);
BUT (now difficult part begins)
1)As documentation says, method toOracleLoaderFormat of Formatter interface returns String only. So you can not return unstructured data or especially 1GB of unstructured data in an ordinal way. The workaround is to use temporary files: unload NoSQL BLOB to a stream, write the stream to a temp file and then read this file using oracle BFILE locator. Yes, I encapsulated filewritting mechanism in toOracleLoaderFormat. But this method is slow, on kvlite database it takes 1:41 minutes to select 1,8 GB file and temp file is a really bottleneck.
2) As far as I encapsulated filewritting mechanism in toOracleLoaderFormat function, every time preprocessor invokes this method, a new 1 GB file is created.
And as long as NoSQL does full scan on its database using ETables, every SELECT results in ALL files extracted in temp directory.
As a crutch I used another file with list of PK that I needed. It is taken to be that this file will have been formed BEFORE main SELECT procedes.
So initially formatter function reads this file and then compares Key part of incoming KeyValueVersion variable with contents of this file. If the Key is in list then extracting proceeds.
For example, PK file contains 1000, 1001, 1003 and NoSQL DB contains recors with keys like
exttab/1000/-/document/archive1000.zip
exttab/9000/-/document/archive9000.zip
Preprocessor invokes Formatter with parameter kvv (key part) = exttab/1000/-/document/archive1000.zip, Formatter parses key, extracts 1000.
Then it reads PK file, finds record 1000 and puts huge 2GB archive to temp dir. When it doesn't find record 9000 it doesn't put a huge archive to temp dir.
==================================================================================
Is there any idea how to perform seamlesly SELECT of BLOB (BFILE) from NoSQL to "SQL" database in a less complicated way and in acceptable time?
==================================================================================
Edited by: 1004734 on May 8, 2013 3:26 PM

Charles, sorry, I tried to send the file from my personal mail (mail.ru domain), but your mail is unroutable.
By the way I tried to create eTable:
CREATE TABLE nosql_data_blob_test (PK integer,
docfilename varchar2(120),
docdata blob)
organization external
(type oracle_loader
default directory ext_tab
access parameters
(records delimited by newline
preprocessor nosql_bin_dir:'nosql_stream'
fields terminated by '|'
PK CHAR(30),
docfilename char(60)
COLUMN TRANSFORMS (docdata FROM LOBFILE (docfilename) FROM (temp_dir) BLOB)
location (ext_tab:'nosql_blob.dat'))
PARALLEL;
After setting all parameters (publishing, etc..) I tried SELECT and got error which in short sounds like Oracle can not see temp_dir but tries to look up ext_tab directory.
But even when I manually copy the file from temp_dir to ext_tab I got another very strange error:
ora-12801 error signaled in parallel query server P000
ora-29913 error in executing odciexttablefetch callout
ora-29400 data cartridge error
KUP-04095 preprocessor command
/home/oracle/kvhome/exttab/bin/nosql_stream encountered error
"java.lang.IllegalStateException: Error of parsing line 1 of
/home/oracle/kvhome/data/TEXT: content is not allowed in prolog.
/home/oracle/kvhome/data/ is ext_tab directory
/home/oracle/kvhome/exttab/bin/ is nosql_bin_dir directory
TEXT is the file I tried to get as blob
What am I doing wrong? May be preprocessor tries to parse TEXT file?
I go holydays up to 12 may, see you that day.
Edited by: Arsenikum on 09.05.2013 2:43

Blob (bfile)+ ole2

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