Call DLL from pl/sql

Hi Every one
I have to call one microssoft dll from the pl/sql using form .
How can I do it.
Prashant

That likely means that the DLL call failed.
Some basics.
A DLL exposes an interface where it lists the names of the proc/func exposed (together with a number/ordinal for each).
The Win32 LoadLibrary() call is used to load a DLL. This returns a handle that is then used by subsequent calls to the DLL.
In order to make the actual call, the caller needs to know the address of the procedure/function in the DLL. The GetProcAddress() is the Win32 call I remember using to get the address to call (but I think it has been deprecated since).
Anyway, for the caller to call that proc/func in the DLL, it needs these steps:
- load that library
- get the "address" of that proc/func in the DLL
- make the call
The DLL is then executed - in the address space of the caller. Yes, the DLL's code segment is loaded once and shared amongst how ever many executables are using that DLL. But the DLL has no data segment - the data segment of the DLL lives in the address space of the caller.
Should the DLL do something dirty/wrong, it can crash the caller by corrupting its address space. Or the DLL call could simply fail, throw an exception and terminate unexpectedly.
This is the basics of the a DLL call - and also why Oracle wants to run that DLL call externally using the EXTPROC interface, so as not to risk that DLL compromising the memory space of the Oracle server process.
This makes it a tad more complex now as the Oracle server process makes a call to EXTPROC (an IPC/RPC call) - and the EXTPROC process makes the DLL call (as described above).
If that EXTPROC process crashes, the call that the Oracle server process made also terminates unexpectedly.
Why can the EXTPROC process crash? Well, there are more meaningful errors returned when the DLL fails to load in my experience. So I expect that your DLL was found and that the EXTPROC process did a successful LoadLibrary() call - and even made a successful GetProcAdress() (or whatever call).
But when the actual call to the DLL func/proc was made, an error resulted (incorrect parameter passing, invalid data types being passed, invalid memory being referenced, etc).
This error caused a fatal error and terminated the EXTPROC process. No meaningful error was therefore returned to the Oracle server process - so it throws the exception "lost RPC connection to external process".
Hope this was not too technical and you got the gist of it.

Similar Messages

Call DLL from PL-SQL block

Hello all,
I want to call a function located in an external DLL from a PL-SQL block. I execute the followin steps :
1. Create a database library pointing to the external DLL :
create or replace library libstk as 'C:\SUMMIT\libstkdte_s_trade1.dll'
2. Create the definition and the body package :
CREATE OR REPLACE PACKAGE dllcall IS
     FUNCTION s_trade (
          s_in VARCHAR2 )
RETURN VARCHAR2;
PRAGMA RESTRICT_REFERENCES(s_trade, WNDS);
end dllcall;
show errors
CREATE OR REPLACE PACKAGE BODY dllcall IS
FUNCTION s_trade (s_in IN VARCHAR2) RETURN VARCHAR2
IS EXTERNAL
NAME "s_trade"
LIBRARY libstk
PARAMETERS (s_in           STRING,
RETURN STRING);
END dllcall;
show errors
set serveroutput on
3. Start the PL-SQL block calling the external function. And I got the foolowing error :
1 begin
2 dbms_output.put_line ( dllcall.s_trade ( '<Request> ' ||
3 '<CurveId>MYCURVE</CurveId> ' ||
4 '<Mode>02</Mode> ' ||
5 '<ExpCcy>GBP</ExpCcy> ' ||
6 '<AsOfDate>20001023</AsOfDate> ' ||
7 '<Entity>***SUMMIT-XML***</Entity> ' ||
8 '</Request>') );
9* end;
10
11 /
begin
ERROR à la ligne 1 :
ORA-06520: PL/SQL: Error loading external library
ORA-06522: Unable to load DLL
ORA-06512: at "V31.DLLCALL", line 0
ORA-06512: at line 2
The "Read - Execute permissions" of the DLL file was given to "Authentified users" .
What's wrong ?
TIA
PS : NT2K environment, DB 8.1.7
R. Charles Emile

Yes, a RPC was set up.
Listner.ora
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = Server1)(PORT = 1521))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = NMP)(SERVER = Server1)(PIPE = ORAPIPE))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\Oracle\Ora81)
(PROGRAM = extproc)
tnsnames.ora
extproc_connection_data =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(CONNECT_DATA = (SID = PLSExtProc))
Thanks
RCE

Call dll from plsql

Hi
I am trying to connect an external program(DLL) from pl/sql.
for the practice i trying to call "GetComputerName" from kernel32.dll.
i made the following step
1. Creating a library .
2. Creating a package .
3. Set the listener.ora
4. Set the tnsnames.ora.
After solving the problame with the settings of the listener.ora
I testing the function , it run with no error but return 'null' .
I thing the problems is with the "parameter"
I do not know of haw to send them .
----my pak-------------------------------
CREATE OR REPLACE Package Body K32 As
Function GetComputerNameK(lpBuffer out varchar2,nSize in out long )Return long Is
External
Library Sys.Kernel32 Name "GetComputerNameW"
Language c
          WITH CONTEXT
PARAMETERS (
CONTEXT,
--lpBuffer STRING,
          lpBuffer BY REFERENCE,
          nSize BY REFERENCE,
          --nSize INDICATOR short,*/
          RETURN INDICATOR--,
     /*     RETURN short */);
End K32;

Let me explain a bit what a VFP DLL is for:
You can only build one type of DLL, an OLE COM Server DLL. It'll mainly contain OLEPUBLIC class definitions, which are then usable in other programming languages. In any programming language capable to make use of OLE COM Server classes.
If your project is named mydll.pjx and a prg or vcx contains a class myclass, the final DLL will have the OLE class "mydll.myclass" in it.
This is overhead, if you use this in VFP. If you want to modularize your application, then create several EXE or build as APP. You can DO some.prg IN some.APP or you can create an object o = NEWOBJECT("myclass","myclasslib.vcx","myapp.app")
to refer to a class inside a vcx compiled and build together with other project files into an app file.
But any separation you do complicates the code use. A DLL is only needed, if some other programming language needs to use your VFP code. And that other programming language has to be able to instanciate classes.
You don't need this, even if other programming languages would be involved. You can compile an EXE and that can be run. If needed with parameters. That's typically much simpler and could even be used by DOS batch files either using the DOS start command
or directly your.EXE as man DOS commands also are merely EXE files.
Bye, Olaf.
Olaf Doschke - TMN Systemberatung GmbH http://www.tmn-systemberatung.de

Vb dll from pl/sql

i have to call VB dll from pl/sql.Can anybody help me ?
thanx

This is how default listener.ora file looks like on my system. By default it has settings for external procedure. Can u please tell me what text in red means? Do i have to chage these setting to run my example?
thanx.
LNRORAEVO =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = small)(PORT = 1521))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
SID_LIST_LNRORAEVO =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\oracle9i)
([red]PROGRAM = extproc[red])
)

Call dll from my dll

I Have a dll file for my attendance machine
and every thing are ok when I call dll from my exe application
I want to create my own dll which my dll connect to attendance dll and get data from it and then insert data to tables
a second question
is there a method for calling my dll through windows batch file or I must create an exe application calling from it

Let me explain a bit what a VFP DLL is for:
You can only build one type of DLL, an OLE COM Server DLL. It'll mainly contain OLEPUBLIC class definitions, which are then usable in other programming languages. In any programming language capable to make use of OLE COM Server classes.
If your project is named mydll.pjx and a prg or vcx contains a class myclass, the final DLL will have the OLE class "mydll.myclass" in it.
This is overhead, if you use this in VFP. If you want to modularize your application, then create several EXE or build as APP. You can DO some.prg IN some.APP or you can create an object o = NEWOBJECT("myclass","myclasslib.vcx","myapp.app")
to refer to a class inside a vcx compiled and build together with other project files into an app file.
But any separation you do complicates the code use. A DLL is only needed, if some other programming language needs to use your VFP code. And that other programming language has to be able to instanciate classes.
You don't need this, even if other programming languages would be involved. You can compile an EXE and that can be run. If needed with parameters. That's typically much simpler and could even be used by DOS batch files either using the DOS start command
or directly your.EXE as man DOS commands also are merely EXE files.
Bye, Olaf.
Olaf Doschke - TMN Systemberatung GmbH http://www.tmn-systemberatung.de

Advantages and Disadvantages of calling java from PL/SQL

Hi,
I have one doubt. What are all the advantages and disadvantages of the calling java from PL/SQL?
In actual scenario the java program will be in the Application server side. It will do the operation and it will store the result in Data base. But in this case (calling java from PL/SQL), we are loading the java program in the Data base and it is doing the operations.
I have seen many posts are coming regarding loading jar files into the database. Actually the jar will deploy in to Application server. Is there any difference instead of keeping in the Application server side?
Then I have read,
advantages:
-> java having lot API's. so PL/SQL can use that API's.
-> if we can not do anything in PL/SQL. we can do it using this mtd(calling java from PL/SQL).
My questions:
-> could you explain what are all the things we can not do but we can do using "calling java from PL/SQL" method?
-> is there any other advantages?
Disadvantages:
-> the performance is very slow in calling java from PL/SQL.
My questions:
-> Then why others are loading java files and jar files into database?
-> is there any other disadvantages?
Could you explain about this one? It will be more helpful to others also…
Regards,
kk

Hi,
You can read the free first chapter of my book @ http://www.amazon.com/gp/product/1555583296/ (see details then Excerpt)
Kuassi http://db360.blogspot.com

Call php from PL/SQL

Hello !
i want to call PHP from PL/SQL(procedure).
Is it possible .
If yes then how.
if no then is there any other way to do it.
Regards
null

<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by Michael Kleiser ([email protected]):
Look at this: http://www.oracle.com/oramag/code/tips2001/index.html?021201.html
It`s a java-function which calls a os-command.
I haven4t testet it.
In this forum http://www.dbasupport.com/forums/showthread.php?threadid=3703
someone asked the same question as you.
I hope this helps you.<HR></BLOCKQUOTE>
I've tried the tip above without success. Has anyone got it to work?
null

Call Micrsosoft DLL from pl/sql

Hi
i have one dll microsoft VB. which returns some control chars.I have to call it from my PL/SQL code.How can I do it.Please help
Prashant

You must build an external library, declare it as a LIBRARY object inside Oracle, configure your lib paths, and configure your listener.
Once you've met the config procedures, next you have to create a wrap function to access your external funcion inside a PLSQL block.
Check this documents:
http://download-west.oracle.com/docs/cd/B19306_01/appdev.102/b14289/dcimethcj.htm#sthref250
http://download-west.oracle.com/docs/cd/B19306_01/server.102/b15658/ldr_demo.htm#sthref565
http://download-west.oracle.com/docs/cd/B19306_01/server.102/b14231/manproc.htm#ADMIN00501
Step 1 - Make entry in the TNSNAMES.ORA.
======
Make the following entry in the TNSNAMES.ORA:
extproc_connection_data.world =
     (DESCRIPTION =
          (ADDRESS =
          (PROTOCOL = IPC)
          (KEY = extproc))
          (CONNECT_DATA =
               (SID = extproc)
Step 2 - Make the necessary entries in the LISTENER.ORA.
======
You can either add an entry to the existing listener or add another listener
process.
Option 1: Add an Entry to the Existing Listener
The information contained in each listener differs. Defining the
listener process is done in two parts. The first part is as follows:
LISTENER =
(ADDRESS_LIST =
(ADDRESS=
(PROTOCOL= IPC)
(KEY= V803)
(ADDRESS=          <-Add this line.
(PROTOCOL= IPC) <-Add this line.
(KEY= extproc)     <-Add this line.
(ADDRESS=
(PROTOCOL= TCP)
     (Host= ###.#.#.#)
(Port= ####)
Step 3 - Start the listener process.
======
Any modifications to the existing listener require that you stop and
restart the listener to reload the new listener configuration. Adding a
second listener process, instead of modifying the current, only requires
the startup of the new listener process.
Step 4 - Create a sample DLL using the following code.
======
The following is a basic example of an external procedure. It is a good
way to test to ensure that the environment (mainly the listener) is configured
correctly.
Note: For the remaining steps, the DLL name should be MYEXTPROC.DLL.
#include <stdio.h>
int __declspec(dllexport) square(int x)
return(x*x);
Step 5 - Move the DLL to same server where the database is located.
======
The DLL can be placed in any directory. One approach would be to create an
EXTPROC directory under the ORACLE_HOME and use this to house all external
procedures.
Step 6 - Create the required library.
=======
Log into SQL*Plus and create a library to be associated with the external
procedure.
Note: The user must have CREATE LIBRARY privileges.
CREATE LIBRARY <mylib> AS <path\filename>;
SQL> CREATE LIBRARY SQUARE_LIB AS 'D:\ORANT\EXTPROC\MYEXTPROC.DLL';
Step 7 - Register the external procedure.
======
An external procedure is not called directly. Instead, you call the PL/SQL
subprogram that registers the external procedure. This can either be a
Function or a Stored Procedure.
CREATE OR REPLACE FUNCTION <FunctionName> (<parm1>...) RETURN <value> AS
EXTERNAL LIBRARY <mylib>
NAME "<Name Of Function In DLL>"
LANGUAGE C;
CREATE OR REPLACE PROCEDURE <ProcedureName> (<parm1>...) AS
EXTERNAL LIBRARY <mylib>
NAME "<Name Of Function In DLL>"
LANGUAGE C;
CREATE OR REPLACE FUNCTION square_of (X BINARY_INTEGER)
RETURN BINARY_INTEGER AS
EXTERNAL LIBRARY SQUARE_LIB
NAME "square"
LANGUAGE C;
Step 8 - Run the external procedure.
======
Use the following code to execute the external procedure:
CREATE OR REPLACE PROCEDURE EXTPROCTEST (X BINARY_INTEGER) AS
RetValue BINARY_INTEGER;
BEGIN
RetValue := square_of(X);
DBMS_OUTPUT.PUT_LINE(RetValue);
End;
EXECUTE EXTPROCTEST(15);

Call report from pl-sql routine

I just got started on the report-tool, so, this might be a very basic question, but, would appreciate your
response.
I have a pl-sql routine registered as a concurrent program. How do I make call to report-builder from this routine.
Thxs,

Hello Chirag,
If you want to invoke and run a report from your PL/SQL code in the database, you can do so by installing and using the SRW package supplied with Reports. This package allows you to run parametrized report jobs on a specified Reports Server from your PL/SQL program and track the job status. Please take a look at the documentation for this package in the Publishing Reports manual on OTN at: http://download-west.oracle.com/docs/html/A92102_01/toc.htm.
On the other hand, if you just need to invoke the Reports Builder program from your PL/SQL routine, you would need to use the default builtin for calling external applications from PL/SQL.
Thanks,
The Oracle Reports Team.

Call RFC From PL/ SQL

Hi Everybody, i have some question:
Its Possible from PL / SQL, call RFC Functions?...
Please can you give me some examples or tell me if is technicaly impossible to do that?..
Thanks a lot.
Greattings
Wilmer Figueroa

Hey,
It is not that easy,
SAP didn't published an package to link PL/SQL to RFC,
however, it is possible with some work:
the PL/SQL can execute command on operation system of the DB
for example 'dir' in windows or 'ls' in unix,
instead of running dir/ls you can execute a program that will execute an RFC in the SAP system.
the program can be developed by .Net connector, see:
NW RFC SDK - is there a guide somewhere?

Calling Dlls from LabVIEW

LabVIEW Gurus:
I am working with some software engineers who have no experience in LabVIEW. Unfortunately I have little experience in C/C++ to make sense of their inquiry.
Basically we are dealing with “Data Marshalling”. I will call a DLL and issue a command (string) and get back a 2-D array and an integer. So far so good.
The C/C++ programmer requested that I provide them with a pointer/memory address in which they will store data, so I can read it once the dll returns the array and integer. I browsed through the example online http://decibel.ni.com/content/docs/DOC-1690 and thought that if I wanted to read from the dll, the process is a simple as calling the appropriate function and configure the parameter (no pointers needed).
So, is there a specific way that they need to write the C/C++ code to be used in LabVIEW? Or what else to I have to take into consideration?
Thank you,
Santiago

That example is pretty simplistic as it only deals with integers. In this case no pointers are required since everything is returned by value. When you're dealing with arrays, however, you need to deal with pointers. If you open the Example Finder (Help -> Find Examples) and search for "dll" you will see the "Call DLL" example. That contains many examples of how to call DLL functions with a wide variety of datatypes. I strongly suggest looking at that example. There is also a chapter in the LabVIEW Help on calling DLLs (Fundamentals -> Calling Code Written in Text-Based Progamming Language).
You have 2 things to consider:
You're dealing with arrays - this means you typically need to pre-allocate the memory in LabVIEW, and it sounds like that's what the DLL expects you to do. This amounts to using the Initialize Array function to create your 2D array of the appropriate size and datatype.
You may be dealing with a C++ DLL. LabVIEW can only interface to C DLLs. This doesn't mean that you can't create a DLL in C++, but it does mean that the C++ programmers need to add an extern "C" modifier to the function calls, otherwise you get name mangling, and LabVIEW won't be able to call the DLL. The DLL programmers should know what that means.

Calling WS from PL/SQL using WS-security

Hi All,
Has anyone experience with calling a Webservice from PL/SQL and use WS-security to encrypt the contents? If not; maybe with java stored procedures in 9i? (in other words: using WS-security without JDeveloper).
with regards,
Michiel Kuperus

Right now what you can do is use SSL via the Java stack calling Web services ... the "call out" examples at:
http://otn.oracle.com/tech/webservices/database.html
show how under a PL/SQL wrapper the same java web services runtime from the middle tier running in the DB can invoke Web services. That stack supports SSL. It does not currently support WS-Security which is an emerging spec from the OASIS standards body.
Oracle, however, is currently working on building WS-Security into its Web services stack. This is however,a post-9.0.4 (the upcoming release of Oracle9iAS) project. Bear in mind that WS-Security is still an evolving standard and while there are some early implementations they will evolve over time as the spec itself solidifies.
Mike.

Call dll from javascript

hai,
i have a dll(VB) in client m/c. i need to call a method in a dll from javascript.
if possible please give some sample code.

http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=calling+a+dll+from+javascript

Call rules from PL/SQL

Hi,
I have ruleset and it being called by RL function.
Is it possible that I can call that rules or rule function from PL/SQL, if yes could you please help me with some ideas. (without involving BPEL)
Thanks
Sreejit

<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by Michael Kleiser ([email protected]):
Look at this: http://www.oracle.com/oramag/code/tips2001/index.html?021201.html
It`s a java-function which calls a os-command.
I haven4t testet it.
In this forum http://www.dbasupport.com/forums/showthread.php?threadid=3703
someone asked the same question as you.
I hope this helps you.<HR></BLOCKQUOTE>
I've tried the tip above without success. Has anyone got it to work?
null

ERROR:SRW Packages to call report from PL/SQL.

Hi,
I am facing the following problem while calling a report from PL/SQL Block.
This is my code
SRW.Start_Debugging;
     MYPLIST :=SRW_PARAMLIST(SRW_PARAMETER('',''));
     SRW.ADD_PARAMETER(myPlist,'GATEWAY'     ,'http:..............');
     SRW.ADD_PARAMETER(myPlist,'USERID'      ,'CGIA_AUTO/AUTO_DEV@ipaddress/ORCL');
     SRW.ADD_PARAMETER(myPlist,'SERVER'      ,'rep_cgian');
     SRW.ADD_PARAMETER(myPlist,'REPORT'     ,'PGIRCGIC047.rdf');
     SRW.ADD_PARAMETER(myPlist,'DESTYPE'     ,'file');
     SRW.ADD_PARAMETER(myPlist,'DESFORMAT'     ,'pdf');
     SRW.ADD_PARAMETER(myPlist,'DESNAME'     ,'\\ipaddress\CGIA_FormPrint\WatchFolder\OTHERS\'||Z.CS_REMARKS_BL||'_'||Z.CS_CHQ_NO||'_'||M_SEQ_NO||'-'||Z.CS_FLEX_07||'-'||Z.CS_FLEX_08||'.pdf');
     SRW.ADD_PARAMETER(myPlist,'PARAMFORM'     ,'NO');
     SRW.ADD_PARAMETER(myPlist,'P_1'     ,Z.CS_BANK_CODE);
     SRW.ADD_PARAMETER(myPlist,'P_2'     ,Z.CS_BAD_ACNT_NO);
     SRW.ADD_PARAMETER(myPlist,'P_3'     ,Z.CS_CHQ_BOOK_ID);
     SRW.ADD_PARAMETER(myPlist,'P_4'     ,Z.CS_CHQ_NO);
     SRW.ADD_PARAMETER(myPlist,'P_5'     ,Z.CS_CHQ_NO);
     MYIDENT:=SRW.RUN_REPORT(MYPLIST);
MYSTATUS := SRW.REPORT_STATUS(MYIDENT);
     SRW.STOP_DEBUGGING;
*** Length of Paramlist : 1
OK : Parameter added : GATEWAY=http://...
*** Length of Paramlist : 2
OK : Parameter added : USERID=CGIA_AUTO/AUTO_DEV@ipaddress/ORCL
*** Length of Paramlist : 3
OK : Parameter added : SERVER=rep_cgian
*** Length of Paramlist : 4
OK : Parameter added : REPORT=PGIRCGIC047.rdf
*** Length of Paramlist : 5
OK : Parameter added : DESTYPE=file
*** Length of Paramlist : 6
OK : Parameter added : DESFORMAT=pdf
*** Length of Paramlist : 7
OK : Parameter added :
DESNAME=\\ipaddress\CGIA_FormPrint\WatchFolder\OTHERS\CUST000115_102024_16--.pd
f
*** Length of Paramlist : 8
OK : Parameter added : PARAMFORM=NO
*** Length of Paramlist : 9
OK : Parameter added : P_1=SDNB
*** Length of Paramlist : 10
OK : Parameter added : P_2=7000674257
*** Length of Paramlist : 11
OK : Parameter added : P_3=7000
*** Length of Paramlist : 12
OK : Parameter added : P_4=102024
*** Length of Paramlist : 13
OK : Parameter added : P_5=102024
Starting run_report: building url
*** Building URL (RUN_REPORT)
OK : URL built :
http://ipaddress/reports/rwservlet?&USERID=CGIA_AUTO%2FAUTO_DEV%40ipaddress%2FORCL&SERVER=rep_cgian&REPORT=PGIRCGIC047.rdf&DESTYPE=file&DESFORMAT=
pdf&DESNAME=%5C%5Cipaddress%5CCGIA_FormPrint%5CWatchFolder%5COTHERS%5CCUST00
*** Submitting HTTP Request
*** using URL
:http://ipaddress/reports/rwservlet?&USERID=CGIA_AUTO%2FAUTO_DEV%ORCL&SERVER=rep_cgian&REPORT=PGIRCGIC047.rdf&DESTYPE=file&DESFORMAT
=pdf&DESNAME=%5C%5Cipaddress%5CCGIA_FormPrint%5CWatchFolder%5COTHERS%5CCUST0001
OK : Request submitted - Return stream : <?xml version = '1.0' encoding =
'ISO-8859-1' standalone = 'yes'?>
<serverQueues>
<error code="503"
component="REP" message="You did not specify the name of a
report."/>
</serverQueues>
Here in this case even though i specify the report id in the parameter,debugger message says that 'You did not specify the name'.
The same code is working in some other server and giving the pdf output.
Thanks in advance for any clarification.

Hello Chirag,
If you want to invoke and run a report from your PL/SQL code in the database, you can do so by installing and using the SRW package supplied with Reports. This package allows you to run parametrized report jobs on a specified Reports Server from your PL/SQL program and track the job status. Please take a look at the documentation for this package in the Publishing Reports manual on OTN at: http://download-west.oracle.com/docs/html/A92102_01/toc.htm.
On the other hand, if you just need to invoke the Reports Builder program from your PL/SQL routine, you would need to use the default builtin for calling external applications from PL/SQL.
Thanks,
The Oracle Reports Team.

Call DLL from pl/sql

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