Invoking external C code from Oracle

How do I invoke external C code on another machine from Oracle?
I need certain queries in Oracle to trigger a call to C code that is running on a different machine. We need to find out which architecture is suited to this.
We plan to port this solution to other databases in the future, so it would be better if the solution was platform independent.
Thanks

What is the API to this C code?
What, exactly, would you be looking for in a platform independent way to invoke C code from a database? You can build a web service interface to the C code, which would provide a relatively database independent interface to various databases. But the Oracle code that would call the web service would be very much database specific. As would the code in any other database to call a web service. Plus if you're talking about data mining, you're probably talking about transferring a rather large volume of data from the database, which would generally make web services and the associate XML a rather inefficient data transfer mechanism.
Most databases have the ability to generate a flat file as well, but that tends to be a rather database-dependent API.
Can the C code not extract the data from the database? There are a ton of somewhat database independent APIs that would allow a client application extract data from a variety of databases.
Justin

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Error while trying to call external web service from oracle PL/SQL 10.2 g

Hi I am trying to call an external web service from oracle PL/SQL .I am getting following run time error when I try to set the opeartion style.
But as per the oracle documentation this is one of the 2 valid values.
ORA-29532: Java call terminated by uncaught Java exception: operation style: "document" not supported.Teh webservice does expect the operation style as document.
Following is the code I am executing.
FUNCTION email
return varchar2
AS
service_ SYS.utl_dbws.SERVICE;
call_ SYS.utl_dbws.CALL;
service_qname SYS.utl_dbws.QNAME;
port_qname SYS.utl_dbws.QNAME;
operation_qname SYS.utl_dbws.QNAME;
string_type_qname SYS.utl_dbws.QNAME;
retx ANYDATA;
retx_string VARCHAR2(1000);
retx_double number;
retx_len number;
params SYS.utl_dbws.ANYDATA_LIST;
l_input_params SYS.utl_dbws.anydata_list;
l_result ANYDATA;
l_namespace VARCHAR2(1000);
begin
-- open internet explorer and navigate to http://webservices.imacination.com/distance/Distance.jws?wsdl
-- search for 'targetNamespace' in the wsdl
l_namespace := 'http://service.xmlservices.global.freedomgroup.com/';
-- search for 'service name' in the wsdl
service_qname := SYS.utl_dbws.to_qname(l_namespace, 'ClientCoreWebServiceBeanService');
-- this is just the actual wsdl url
service_ := SYS.utl_dbws.create_service(HTTPURITYPE('http://hostname/GlobalWebServices/services/ClientCoreWebService?wsdl'), service_qname);
-- search for 'portType name' in the wsdl
port_qname := SYS.utl_dbws.to_qname(l_namespace, 'ClientCoreWebServiceBeanPort');
-- search for 'operation name' in the wsdl
-- there will be a lot, we will choose 'getCity'
operation_qname := SYS.utl_dbws.to_qname(l_namespace, 'postalCodelookup');
-- bind things together
call_ := SYS.utl_dbws.create_call(service_, port_qname, operation_qname);
-- default is 'FALSE', so we make it 'TRUE'
SYS.utl_dbws.set_property(call_, 'SOAPACTION_USE', 'TRUE');
-- search for 'operation soapAction' under <wsdl:operation name="getCity">
-- it is blank, so we make it ''
SYS.utl_dbws.set_property(call_, 'SOAPACTION_URI', '');
-- search for 'encodingstyle' under <wsdl:operation name="getCity">
SYS.utl_dbws.set_property(call_, 'ENCODINGSTYLE_URI', 'http://schemas.xmlsoap.org/soap/encoding/');
-- search for 'binding style'
SYS.utl_dbws.set_property(call_, 'OPERATION_STYLE', 'DOCUMENT');
-- search for 'xmlns:xs' to know the value of the first parameter
-- under <wsdl:message name="getCityResponse"> you will see the line <wsdl:part name="getCityReturn" type="xsd:string" />
-- thus the return type is 'string", removing 'xsd:'
string_type_qname := SYS.utl_dbws.to_qname('http://www.w3.org/2001/XMLSchema', 'string');
-- in the line <wsdl:operation name="getCity" parameterOrder="zip">
-- the parameterOrder is 'zip', thus we put in 'zip'
-- the 'ParameterMode.IN' is used to specify that we will be passing an "In Parameter" to the web service
-- the 'ParameterMode.IN' is a constant variable in the sys.utl_dbws package
--vj this cud be either params or xml
SYS.utl_dbws.add_parameter(call_, 'param1', string_type_qname, 'ParameterMode.IN');
SYS.utl_dbws.add_parameter(call_, 'param2', string_type_qname, 'ParameterMode.IN');
SYS.utl_dbws.set_return_type(call_, string_type_qname);
-- supply the In Parameter for the web service
params(0) := ANYDATA.convertvarchar('<TFGGlobalBasicXMLDO><systemCd>GLOBAL</systemCd><username>GlobalAdmin</username><password>GlobalAdmin</password><localID>1</localID></TFGGlobalBasicXMLDO>');
params(1) := ANYDATA.convertvarchar('<TFGGlobalPostalCodeLookupIDDO><postalCode>02446</postalCode><countryCode>USA</countryCode><stateCode>MA</stateCode><cityDisplay>BROOKLINE</cityDisplay><countyDisplay>NORFOLK</countyDisplay><include_inactive_flag>True</include_inactive_flag></TFGGlobalPostalCodeLookupIDDO>');
-- invoke the web service
retx := SYS.utl_dbws.invoke(call_, params);
dbms_output.put_line(retx.gettypename);
-- access the returned value and output it to the screen
retx_string := retx.accessvarchar2;
dbms_output.put_line('done' || retx_string);
dbms_output.put_line('PL/SQL DII client return ===> ' || retx_string);
-- release the web service call
SYS.utl_dbws.release_service(service_);
return retx_string;
end email;

thsi is urgent anybody ????

Error: ORA-03113 while executing complex java code from Oracle PL/SQL

Hi,
I am trying to execute a complex java code from Oracle PL/SQL. The classes were resolved successfully. But in the middle of execution, I am getting the following error:
ERROR:
ORA-03114: not connected to ORACLE
begin
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 13685
Session ID: 21 Serial number: 20
Is there a way to debug the Java classes loaded into oracle? Or is there any utility to find out why the connection was lost?
Regards,
Saravana

Hi Saravana:
You could use simply System.out.println(..) at your Java code and see the output at the .trc files generated for your Oracle session.
Or better than this adding Java Util Logging messages at your code, to see how to use JUL API at the OJVM please see this blog post [Using JUL API inside the OJVM|http://marceloochoa.blogspot.com/2007/11/getting-logging-entering-exiting-and.html].
Best regards, Marcelo.
PD: ora-0600 generally are associated with RDBMS bugs, but these bugs can be bypassed by replacing the code which throws the exception by other with a workaround.

How can I invoke a sql loader from oracle form?

I'm got a problem on invoking sql loader command from oracle form where the sql loader product has been installed in Window NT.
Thanks for your help!

U can use HOST procedure with NO_SCREEN option.
this will go like
Host('d:\orant\bin\SQLLDR80 USERID=username/password@connect CONTROL=contril_file.CTL LOG=log_file.LOG discard=discard_file.dis bad=bad_file.bad', NO_SCREEN);
Hope this will Work
Good Luck :-)
Naren

Invoking external javascript file from xdp source

Is it possible to invoke an external javascript file from within the xdp source? I know it is possible to embed the javascript in the form.
If this is possible, would I be correct in assuming that this is also possible from pdf source?
Basically I am looking to show / hide buttons based on the status associated with a form at a given time in the flow. My understanding of PDFs is that the source cannot be edited once it has been created? If this is the case I was hoping that there could be code embedded that would call on the external file which would return the status of the letter. Based on the response buttons / fragments etc could be shown / hidden as required.
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You cannot call outside of the rendered form. So you have a couple of means to get information into the form. Merge dat aonto the form (in your case you can use a field as a flag and key off of that),or use Web Service call to check the status.
Hope that helps
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Hi,
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Using a concurrent program( Unix / Host program ) we are passing the input variables required for the Bpel process in the ProcessRequest tags and forming this as a SOAP message payload.
Then trying to invoke the deployed bpel process using the end point location using HTTP POST..but nothing is happening..
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UTL_HTTP.SET_DETAILED_EXCP_SUPPORT(ENABLE=>TRUE);
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'<soap:Header/>'||
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check if your soap envelope is correct,check my below procedure which is working fine for me
procedure xxxxx_BPEL_SCHEDULER
IS
soap_request varchar2(30000);
soap_respond varchar2(30000);
http_req utl_http.req;
http_resp utl_http.resp;
launch_url varchar2(240) ;
begin
soap_request:='<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:add="http://schemas.xmlsoap.org/ws/2003/03/addressing" xmlns:star="http://xmlns.oracle.com/xxxxx_BPEL_SCHEDULER">
<soapenv:Header>
<add:MessageID>?</add:MessageID>
<add:ReplyTo>
<add:Address>?</add:Address>

<add:ReferenceProperties>

</add:ReferenceProperties>

<add:PortType>?</add:PortType>

<add:ServiceName PortName="?">?</add:ServiceName>

</add:ReplyTo>
</soapenv:Header>
<soapenv:Body>
<star:STARS_BPEL_SCHEDULERProcessRequest>
<star:SCHEDULER_PARAM1>?</star:SCHEDULER_PARAM1>
<star:SCHEDULER_PARAM2>?</star:SCHEDULER_PARAM2>
<star:SCHEDULER_PARAM3>?</star:SCHEDULER_PARAM3>
<star:SCHEDULER_PARAM4>?</star:SCHEDULER_PARAM4>
<star:SCHEDULER_PARAM5>?</star:SCHEDULER_PARAM5>
</star:STARS_BPEL_SCHEDULERProcessRequest>
</soapenv:Body>
</soapenv:Envelope>';
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,'POST',
'HTTP/1.1'
utl_http.set_header(http_req, 'Content-Type', 'text/xml') ;
utl_http.set_header(http_req, 'Content-Length', length(soap_request)) ;
utl_http.set_header(http_req, 'SOAPAction', 'initiate');
utl_http.write_text(http_req, soap_request) ;
http_resp:= utl_http.get_response(http_req) ;
utl_http.read_text(http_resp, soap_respond) ;
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Connecting to an external web service from Oracle BPEL

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Invoking external C code from Oracle

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