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])
)

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 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.

How use DLL from PL/SQL

Dear Mr/Mrs,
My system is
1.Oracle Database 10g express edition(with apex 3.2)
2.Windows 2003 server
3.GSM Modem(usb cable + Vendor Provided dll for developer)
4.Mobile SIM card
Now ,i want to send SMS from Database.
N.B: email to sms is not my intention
Thanks
Engr.M.K Chowdhury

Hi,
What's wrong with the last answer Re: Using DLL from apex ?
Regards
Peter

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);

Calling external dll from oracle 8i pl/sql

Hi
I am facing in calling extrenal dll from pl/sql.
Steps followed by me are
1.
create library crc_lib as
'D:\ORACLE\ORA81\RDBMS\EXTPROC\EXTPROC\my.DLL';
2.
CREATE OR REPLACE FUNCTION check_file_crc (f1 char)
RETURN BOOLEAN AS
EXTERNAL LIBRARY CRC_LIB
NAME "Check_File_CRC"
LANGUAGE C;
3. CREATE OR REPLACE PROCEDURE CRC_TEST (f1 varchar2) AS
     RetValue varchar2(100);
BEGIN
     if check_file_crc(f1) then
          RetValue := '0';
     else
          RetValue := '1';
     end if;
     DBMS_OUTPUT.PUT_LINE(RetValue);
EXCEPTION
     when others then
     DBMS_OUTPUT.PUT_LINE(sqlerrm|| 'I am in exception');
END;
4.ET SERVEROUTPUT ON
SQL> exec crc_test('C:\file.txt');
ORA-28576: lost RPC connection to external procedure agent
I am in exception
I have tsnames.ora as
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
and listner.ora as
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\Oracle\ora81)
(PROGRAM = extproc)
I am unable to resolve problem please help.
Prashant
Edited by: prashant13 on Jul 23, 2009 11:27 AM

See if MOS note      468404.1 proves helpful here (though not meant for your version of Oracle).

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

Accessing html field value from pl/sql code, in the same package

hi friends,
my pl/sql web application is working fine. but now i need a small requirment.
ie, basicaly i need to access the user entered value of an element in html based form from pl/sql code, which is developed using pl/sql toolkit.
Here is the scenario:-
User entered a value in field1, then navigate to field2, and click a button for list of values,
when he clicks the button, internaly it is opening a cursor, where i want to pass field1's value to my cursor as a parameter. So in my pls/sql code , i want to access the value of field1. If you know, please help.
see the snippet of code.
htp.p('
function f1()
if (parseInt(learnIdx) ==1 )
for i in dev_Need('1')/*here i want to pass html form element value as a parameter */
loop
htp.p('content += "<option value='''||a.version_name||'''>'||a.version_name
||'</option>''"; ');
end loop;
thanks in advance.
Zameer.N.A

Hi,
Here's my suggestion
If you wanna access the dll check out "external procedures", you can search it everywhere in OTN.
However it's easier to use Heterogenous Services to connect database with other sources.
Check out http://asktom.oracle.com/pls/ask/f?p=4950:8:13454621522426176943::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:4406709207206,
Tak Tang answer on May, 25, 2004 rules!

How to call VB program from PL/SQL ?

hi, i use oracle8i and i would like to call program VB from Stored procedur or PL/SQL program.
Is it possible and how?
thanks

If you are trying to invoke a WebService, it shouldn't matter what under what platform that WebService compiled or where it is executing, as long as it is on a shared network. That is the very "definition" of a WebService. You should be able to invoke the webservice via TCP sockets, streaming XML message content.
If your VB WebService isn't, in reality, a WebService and you need to invoke it as an ActiveX dll that is possible with Oracle COM Automation. The 8i/9i data server must be running on the win32 platform that has the ActiveX dll installed. I'm not sure if there is any DCOM possibilities (though I suspect not). In all circumstances, if you data server is running on a non-win32 platform, you are out of luck.
If you are trying to invoke an ActiveX application (not a dll) from the 8i/9i data server, you are pretty much out of luck, too.
Hope that helps,
Michael

Is it possible to call a activeX control from PL/SQL...?

Hi all,
Is it possible to call a activeX control from PL/SQL...? If yes, please give me sample code or any link.
Thanks,
Pal

The LoadLibrary() Win32 call is used to find the physical DLL and load it into memory. This API call first look in the current directory for the file, and then uses the PATH environmental variable to try and find the file.
Thus you need to make sure PATH is properly set. A Win32 process runs in a 32bit VM (Virtual Machine). Been a very long time since I did Windows server side development, but as I recall this VM inherits the default o/s environment (unlike Unix where the parent process environment is inherited).
You can set the environment using the Properties menu of the System desktop icon (or via Control Panel).
However.. Oracle does not run as your user. Typically it is installed as the o/s user Oracle and this user owns all the Oracle processes (listener, instance, etc).
So you will need to make sure that this user's environment is correctly configured... Further more than this, I'm out of my depth. Did a lot of Windows stuff back in the 90's, but for many years now I'm only using Unix/Linux professionally - with Windows being my console platform for playing games at home. :-)
On the Linux/Unix side, I configure the environment variable via the Listener. E.g. Under the entry SID_LIST_LISTENER, I configure the external procedure handler as follows:
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME=/tjs-dev/app/oracle/product/10.2.0)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ANY")
)No idea how this applies and works on the Windows side.

Scenario to call c programs from pl/sql

I know that c routines can be called from Oracle pl/sql. But, I would like to know that anybody has the realtime scenario where it is unavoidable.
Please let me know if anybody has any specific scenarios.
Thanks in advance
Sudhir

There are numerous scenarios - as Oracle is operating system agnostic (mostly) and do not provide numerous 3rd party interfaces.
For example, you want to use MAPI (Microsoft's <i>Mail API</i>). You can write a C dll that provides an easy and basic interface into MAPI - and then define this C dll as external procedure that enables you to perform PL/SQL calls to logon to a Microsoft Exchange Server, verify and get users, send mail, enumerate the contents of a mail box's folder, read a mail, and so on.
Or something more complex. Oracle is used by an application server that provides automated telephonic call centre support. You know - the automated system that answers your support call, asks numerous questions, gets input from you and attempts to troubleshoot your problem. Modern systems like these use speech recognition interfaces - where the caller can (using plain English) state the problem, instead of pushing tone buttons on the phone.
Such a system will need XML templates defining the speech recognition interface context - these templates with define the basic sentence structures the caller will use, words used, assign values to the words for processing and so on. These XML templates (together with the troubleshooting data and rules) can be stored in Oracle.
One function needed will be to verify the XML template with the speech recognition system used. Again, this can be done from PL/SQL. When a new template is entered into the database, PL/SQL can make an external proc call to a C dll that interfaces with SAPI v5 (Microsoft's <i>Speech API</i>) to compile the XML template and determine whether it is valid or not.
There are literally 1000's upon 1000's of such scenarios that requires one to call external services and interfaces from PL/SQL - and the external proc feature of Oracle is often the technical solution that can be used to address the requirement.

Accessing Excel cell value from PL/SQL

I Would like to part my question into 2 sections. Both are related to PL/SQL
(Version 8.x or 9.x) COM automation
A). I have a spreadsheet with some values in the following cell address
File Name : Employee.xls
Worksheet Name : Emp_Detail (There are other spreadsheets)
Cell Address
Employee id : C50
Name : Z10
Address : X10
I will have to grab the follwing cell values and insert into the staging table
usinf PL/SQL. I have read some of your article realting to OWS package which
retieves the whole excel spread sheet.
B). I have a Activex control developed in VB6.0 and registered. Inside the dll there is a class
AccessXLS.cls, which uses the objects/functions relating
to the Excel spreadsheet.
I would like to know is there any COM automation method
to activate the dll from my PL/SQL.
Awaiting for your reply

Hi,
Here's my suggestion
If you wanna access the dll check out "external procedures", you can search it everywhere in OTN.
However it's easier to use Heterogenous Services to connect database with other sources.
Check out http://asktom.oracle.com/pls/ask/f?p=4950:8:13454621522426176943::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:4406709207206,
Tak Tang answer on May, 25, 2004 rules!

Use evdre to query data from a SQL View

Hi all
I believe that it is possible to use evdre to query data from a SQL View. If this is possible then how does one go about setting it up in the evdre options (assuming that the view has already been created)?
Regards,
Byron

Byron, perhaps this is no longer supported, it might be worth opening up a case at service.sap.com on this. However, I did find the following on Page 11 of the "Usages and Considerations of EVDRE" pdf file. This doc is imbedded in the helpfile for BPC 7 SP5 (which was released in August of 2009, well after note 1315011 was last updated.
It looks like you are limited to one custom view per application, since you have to name the view in a parameter at the APPLICATION level. Go into BPC Administration, login to the application related to the custom view, choose "Set Application Parameters" and enter the name of the view to the Application Parameter called "EVDRE_QUERYVIEWNAME" If it is not listed, go ahead and create it at the bottom of the Application parameter screen.
Also: I interpreted the following info from Page 10 of the same doc:
In your EVDRE, set the following options:
QueryEngine: MANUAL
QueryType: enter either NEXJ OR TUPLE see below:
NEXJ - Use two-dimensional queries using the nonemptycrossjoin function
TUPLE - Use two-dimensional queries using tuples"
And I'm assuming you'd enter a Y for the following two parameters:
QueryViewName
"..to enforce the query engine to use a used-defined SQL view of the fact tables, when trying to read the values using SQL queries. This option is typically used in conjunction with the SQLOnly option (see below). "
Option SQLOnly
"..to enforce the query engine to only execute SQL queries, when reading data. This can be achieved using this option."

Calling secured web service from Pl SQL

Hi
I am trying to call a secured web service from pl/sql using utl_http.
Is there a sample pl/sql program that i can refer to call a secured web service.
sample soap header that am trying to acheive.
<soap:Header>
<wsa:Action>http://myactaction</wsa:Action>
<wsa:MessageID>uuid:asdfadrewrwqr</wsa:MessageID>
<wsa:ReplyTo>
<wsa:Address>http://schemas.xmlsoap.org/ws/2004/03/addressing/role/anonymous</wsa:Address>
</wsa:ReplyTo>
<wsa:To>http://myact</wsa:To>
<wsse:Security soap:mustUnderstand="1">
<wsse:UsernameToken wsu:Id="SecurityToken-321321">
<wsse:Username>mordfsafsdae</wsse:Username>
<wsse:Password Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText">werwqrewrwe</wsse:Password>
</wsse:UsernameToken>
</wsse:Security>
</soap:Header>
Thanks a ton in advance

Hi,
On way we can call a web service is to pass the Web Service URL to UTL_HTTP package:
Sample Web Service URL
===================
lv_url :=
'http://67.97.189.151:8888/plsqlsample/dbfunc?invoke=placeOrder'
|| '&'
|| 'param0=1'
|| '&'
|| 'param1=1'
|| '&'
|| 'param2=1';
Sample Call using UTL_HTTP
=====================
SELECT UTL_HTTP.request (lv_url)
INTO lv_result
FROM DUAL;
Thank you.
Regards,
Balu

How to update or populate table in SQL server from PL/SQL

Hello - I am starting in the fascinating world of PL/SQL. One of the first task I've been assigned is to rewrite a code (basically I was thinking of creating a package with proc included) on PL/SQL that updates and/or populates tables in MS SQL Server. How should I do this? Is it doable? I guess it is. How can I call tables from others databases from PL/SQL? How to establish the conecction? where? It should be included in the package?
Any help will be appreciated
Thanks,
CC

See PL\SQL and SQL Server

Vb dll from pl/sql

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