External procedure problem

Hi all
I tried to start shell script from database using external procedure (I would like to learn about external proc ).
1. I used c program and than :
xlc -G -c oracle_host.c
ld -r -o oracle_host.so oracle_host.o
chmod 755 oracle_host.so ### prava
export OBJECT_MODE=64
make -f demo_rdbms.mk extproc_no_context SHARED_LIBNAME=/oracle/lib/oracle_host.so OBJS=/oracle/lib/oracle_host.o
and error :
make: 1254-002 Cannot find a rule to create target extproc_no_context from
dependencies.
db version 10.2.0.3
os AIX 5.3 ml9
when I tried it in another env wirh 10.2.0.3 on AIX 5.3 ml6 al work ok
Can You help me where I do mistake
Thank You Brano
Edited by: branislav.dobrotka on Mar 5, 2009 10:41 PM

1. Didn't help.
2. Permissions set for all users on the *.dll file. Still nothing.
[Edit]
I tried setting EXTPROC_DLLS to ANY but nothing changed. In Oracle documentation, I found something about ENVS not being supported on Windows. Is it really the case? As far as I remember, the default listener.ora file contained an ENVS entry. If so, does any one know how to configure the listener properly?
Also, could somebody please comment on the following:
"Oracle Database 11g: PL/SQL Programing" says that external procedures require a separate listener. However, the default listener.ora file looks as follows:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\Program-Files\Oracle11g\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:C:\Program-Files\Oracle11g\product\11.2.0\dbhome_1\bin\oraclr11.dll")
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
ADR_BASE_LISTENER = C:\Program-Files\Oracle11g
My question is: will my computer explode when I append the path to my DLL to the EXPROC_DLLS variable? I know I could see for myself, but maybe there's a pretty good reason why I shouldn't use it like that. I'm a beginner so please don't laugh at me if what I'm saying sounds stupid.

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1. Didn't help.
2. Permissions set for all users on the *.dll file. Still nothing.
[Edit]
I tried setting EXTPROC_DLLS to ANY but nothing changed. In Oracle documentation, I found something about ENVS not being supported on Windows. Is it really the case? As far as I remember, the default listener.ora file contained an ENVS entry. If so, does any one know how to configure the listener properly?
Also, could somebody please comment on the following:
"Oracle Database 11g: PL/SQL Programing" says that external procedures require a separate listener. However, the default listener.ora file looks as follows:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\Program-Files\Oracle11g\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:C:\Program-Files\Oracle11g\product\11.2.0\dbhome_1\bin\oraclr11.dll")
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
ADR_BASE_LISTENER = C:\Program-Files\Oracle11g
My question is: will my computer explode when I append the path to my DLL to the EXPROC_DLLS variable? I know I could see for myself, but maybe there's a pretty good reason why I shouldn't use it like that. I'm a beginner so please don't laugh at me if what I'm saying sounds stupid.

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DllClass::DllClass(char *cmd)
int num;
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I need only to execute some OS command from PL/SQL (rdbms 10.2).
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Suggest that you first make it much simpler. Do not object orientation. Use plain vanilla flavour C. And even before using C, use a kernel call instead. For example, the gethostname() is a standard Socket call that you will find on many operating system (including Windows & Unix).
The following code sample illustrates (can be run as is via SQL*Plus):
-- specify the external library (shared lib on Unix, DLL on Windows)
create or replace library libc as 'libc.sl';
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-- wrapping this API call with a PL/SQL function
create or replace function gethostname( hostname OUT string, size_t binary_integer ) return binary_integer is
 external
 library libc
 name "gethostname"
 language C
 calling standard C
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 size_t INT
-- calling the kernel API routine from within PL/SQL
set serveroutput on
declare
 host$ varchar2(60);
 rc$ integer;
begin
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Of course, the DLL name for Window is different than the Shared Library ('libc.sl') used in the above snippet. Do not have a Win32 Oracle platform to test on, but you should find this API call in the winsock.dll library.

As for writing your custom extproc in C. Plain vanilla C is something as follows:
int dosomestuff()
return( 123456 );

Remember that this function has to be exported in the DLL interface.

Also keep in mind that using extproc is usually the last option to pursue when dealing with Oracle development. The basic rules are as follows:
1. Do it in SQL.
2. If it cannot be done in SQL, do it as a PL/SQL proc
3. If if cannot be done in PL/SQL. do it as a Java stored proc
4. If if cannot be done in Java, do is as an external proc
The times that I need to resort to using Java is less than a handful (most obvious one is using Java to gain o/s command line access). I have never put external proc code into production as we have yet to have a need for something so exceptional, that it cannot be done using SQL, PL/SQL or Java as the last resort.

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Oracle Forms does support Single Sign-On (SSO). Take a look at Oracle Containers for J2EE Security Guide: OC4J Java Single Sing-On. Also take a look at the Oracle Forms 10g Sample Code and scroll to the SSO demo under the Forms Services Demo section. There are also, numerous other documents available via Google. ;-)
Craig B-)
If someone's response is helpful or correct, please mark it accordingly.

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That is my code and error code.
ore.connect(user = "rquser", sid = "db11g", host = "....", password = "....", all = TRUE)
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error.oci.GetQuery(conn, statement, data = data, prefetch = prefetch, :
ORA-28575: unable to open RPC connection to external procedure agent
ORA-06512: at "RQSYS.RQEVALIMPL", line 17
ORA-06512: at "RQSYS.RQEVALIMPL", line 14
ORA-06512: at line 4
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# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
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ADR_BASE_LISTENER = H:\ORA11G
-============================
# tnsnames.ora Network Configuration File: F:\OracleDB\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
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DB11G =
(DESCRIPTION =
(ADDRESS_LIST=
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(CONNECT_DATA =
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====================================================
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(DESCRIPTION_LIST =
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Hi,
I am afraid that according to the error message, it seems that this issue is mainly related to third-party, since issues using oracle database are not supported here, you could consider posting this issue in its website to get supports.
In addition, you could mark any reply as answer if it is helpful.
Thanks for your understanding.
Regards.
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Rpc error calling an external procedure

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Uptime 0 days 0 hr. 0 min. 6 sec
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Listener Log File /home/oracle/ora01/app/oracle/8.0.5/network/log/listener.log
Listener Trace File /home/oracle/ora01/app/oracle/8.0.5/network/trace/listener.trc
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elvis has 1 service handler(s)
extproc has 1 service handler(s)
The command completed successfully
I'm using Oracle 8.0.5 and RedHat 6.0. The name of machine is elvis and the sid name is elvis as well. Any bright ideas are more than welcome
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your listener.ora file has problem!
it should look similiar to:
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = elvis)(PORT = 1521))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = <substitute with your oracle home>)
(PROGRAM = extproc)
(SID_DESC =
(GLOBAL_DBNAME = elvis)
(ORACLE_HOME = <substitute_with_your_oralce_home>)
(SID_NAME = elvis)
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<BLOCKQUOTE>quote:<HR>Originally posted by Benjamin Sigursteinsson ([email protected]):
I'm having a problem calling an external procedure running on Linux. The setup works using NT and a DLL, but when the function has been converted to a .so library, I get get
ORA-28575: unable to open RPC connection to external procedure agent
Now this is probaly due to my listener config since when starting the listener I get an IPC error:
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TNS-12541: TNS:no listener
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TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (ADDRESS=(PROTOCOL=TCP)(Host=elvis)(Port=1521))
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null

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I met a strange problem today with Oracle RAC 10.2.0.4:
Situation I:
In the sequence of tnsnames.ora or TAF, put NodeA before NodeB, everything works well. Even if NodeA is down and only NodeB works.
Situation II:
If put NodeB before NodeA, strange things happened.
1) I can connect to via type2(tnsnames) or type4(url) via sqlplus, and I can also call my extproc in sqlplus.
2) If I call external procedure via API, whatever type2 or type4, it will report "ORA-06576: not a valid function or procedure name"
RAC should share anything on both nodes, why Situation I and Situation II have different behaviour? Can anyone help me? Thanks!

Thanks.
In fact, using the supplied makefile in $ORACLE_HOME/plsql/demo and MAKING SURE THAT THE .SO IS EXECUTABLE(!) works.

External Procedure

Hi,
I created a dynamic library for use as an external procedure, but the extproc returns the error:
ORA-28595 - Invalid DLL path.
I already checked the library path but it's right and the oracle user owns the directory and the library, has all the permitions needed by the OS.
any sugestions?

Ok, here is what have I done to eliminate this problem:
1. I've initialized LD_LIBRARY_PATH as $ORACLE_HOME/lib befor listner starting.
2. Ive created a simbolic link from $ORACLE_HOME/lib directory to mu development directory.
Example:
ln -sf $ORACLE_HOME/lib/libmylibrary.so /home/MyLogin/MyDevelopmentDirectory/libmylibrary.so.0.0

External Procedure Returns Bad String

Hello,
I have an strange issue. I have an external procedure that returns an string but when i call it Oracle gets an string of zero's ascii chars. The length it`s ok but the content not.... The wrapper function is
PROCEDURE getString(returnValue OUT VARCHAR2) AS
LANGUAGE C
LIBRARY "UFDs"
NAME "getString"
WITH CONTEXT
PARAMETERS (
context,
returnValue STRING,
returnValue INDICATOR short,
returnValue LENGTH int
And the C code is
DLLIMPORT void getString(OCIExtProcContext* context,
char* returnValue,
short* returnValue_ind,
int* returnValue_len )
returnValue = (char*)OCIExtProcAllocCallMemory(context, 13);
//returnValue[0] = '\0';
strcpy(returnValue,"hello from c");
/* I have test this to gen a file an the string is OK
char buffer[500];
strcpy(buffer,"echo ");
strcat(buffer,returnValue);
strcat(buffer," >c:\\sal.txt");
system(buffer);
*returnValue_len = strlen(returnValue);
*returnValue_ind = (short)OCI_IND_NOTNULL;
return;
When i call this from oracle i get an string of size 12 but the string has invalid chars (zero ascii chars). Could it be a problem with charset conversion? Anybody has an example or idea?.
Regards

Can you please post your query / stored procedure you are using? Very possible reason includes one among your substring (within the concat) is null and making the final output to be null. Size, esp 800 shouldn't matter.

"ORA-28578: protocol error..." before calling an external procedure

Hello,
Oracle reports this error
Error report:
SQL Error: ORA-29856: error occurred in the execution of ODCIINDEXCREATE routine
ORA-28578: protocol error during callback from an external procedure
29856. 00000 - "error occurred in the execution of ODCIINDEXCREATE routine"
*Cause: Failed to successfully execute the ODCIIndexCreate routine.
*Action: Check to see if the routine has been coded correctly.
when it tries to call an external procedure in order to create a domain index. If I implement ODCIIndexCreate in PL/SQL, it is executed successfully. If I specify that ODCIIndexCreate is implement it an external library, then I get the above error even if the library does not exist on the file system. Does anyone have an idea what might be wrong?
Regards,
Angel Tsankov

This forum is about using the Studio C/C++/Fortran compilers, and programming in those languages. You seem to have a question about using SQL for access to an Oracle database, which is none of the above.
I suggest you try an Oracle database forum. Start here:
https://forums.oracle.com/forums/category.jspa?categoryID=18
Look for a forum that applies to your problem area.
Edited by: Steve_Clamage on Jun 13, 2012 8:42 AM
(Correcting the URL I posted earlier.)

Error Calling an external procedure

I'm calling an external procedure (provided by a third party).
When i invoke it from a client code, it functions.
When I invoke it from PL/SQL code, it gives the following error:
ORA-28576: lost RPC connection to external procedure agent.
The solution in the help file states it could be a timeout problem.
If so, what is the solution to the problem. (I cannot access the source of the DLL subroutine).

your listener.ora file has problem!
it should look similiar to:
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = elvis)(PORT = 1521))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = <substitute with your oracle home>)
(PROGRAM = extproc)
(SID_DESC =
(GLOBAL_DBNAME = elvis)
(ORACLE_HOME = <substitute_with_your_oralce_home>)
(SID_NAME = elvis)
please verify with net8 admin guide. you also need to set up tnsnames.ora correctly at client side.
<BLOCKQUOTE>quote:<HR>Originally posted by Benjamin Sigursteinsson ([email protected]):
I'm having a problem calling an external procedure running on Linux. The setup works using NT and a DLL, but when the function has been converted to a .so library, I get get
ORA-28575: unable to open RPC connection to external procedure agent
Now this is probaly due to my listener config since when starting the listener I get an IPC error:
Connecting to (ADDRESS=(PROTOCOL=IPC)(KEY=elvis))
TNS-12224: TNS:no listener
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (ADDRESS=(PROTOCOL=TCP)(Host=elvis)(Port=1521))
STATUS of the LISTENER<HR></BLOCKQUOTE>
null

Error calling external procedure on remote server

Hello
I have written an external procedure that runs correctly when it is on the same machine as the database from which I call it. (Windows XP Professional/Oracle 9.2)
When I try to call the procedure from a database on another machine (also Windows XP Professiona l/ Oracle 9.2) I get ORA - 28756 "lost RPC connection to external procedure agent" or ORA - 28758 "protocol error during callback from an external procedure". Using filemon I can see that the DLL is never searched for or called. The problem seems to lie in the communication between the two machines. When I observe network traffic the machines communicate on port 1521 (the listener) and then switch to the port that the listener returns. Shortly after that the connection is terminated with the above error reported in the PL/SQL routine.
The Oracle Administrator's Guide (9.2) states that "the agent must reside on the same computer as the application making the external procedure call." However there are several entries on the internet that show how to do what I am want to accomplish - I suspect I am making some small mistake.
Any help would be greatly appreciated!
Here is the listener on the machine with the DLL.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = jacxp01)(PORT = 1521))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\ora90)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=C:\easydist\easydist\Debug\easydist.dll;C:\easydist\easydist\Release\easydist.dll")
Here is the TNSnames.ora on the remote database machine: (I have also tried the commented lines with no more success)
# TNSNAMES.ORA Network Configuration File: C:\oracle\ora92\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(Key = EXTPROC1))
#(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.121)(PORT = 1521))
(CONNECT_DATA =
#(SERVICE_NAME = PLSExtProc)
(SID = PLSExtProc)
)

Hi Long Le Hoang,
I am running a shell script fromSM69 which call psexec.
shell script runs fine but SM69 execution goes on hold.
Can you please help me how to terminate SM69 execution.
Alpa

External procedure problem

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