JDBC receiver adapter - stored procedure response

Question

I am on PI 7.11 and have the following scenario:
RFC->PI->JDBC
whereby the JDBC receiver access an Oracle db (unsure of that version) using a stored procedure "GET_ICBC_ID".
My issue is that I never seem to have any data back in PI on the JDBC response coming back from Oracle. ***
Here is the definition of that stored procedure in Oracle:
Stored Procedure Name: GET_ICBC_ID
  Parameters
                ICBCID    OUT VARCHAR2               <- Returned RACF ID (output)
                REQUESTOR IN VARCHAR2 default 'SAPHR'       <- Optional Requestor ID.
               COMMUNITY IN  VARCHAR2 default 'EMP'       <- Optional Community ID. 
Here is my JDBC call in to the stored procedure (sxi_monitor), which seems to be fine:
  <?xml version="1.0" encoding="UTF-8" ?>
- <ns1:MT_racf_req xmlns:ns1="http://sap.com/xi/Z_SkillSoft">
- <Statement>
- <GET_ICBC_ID action="EXECUTE">
  <REQUESTOR isInput="true" type="VARCHAR">SAPHR</REQUESTOR>
  <COMMUNITY isInput="true" type="CHAR">EMP</COMMUNITY>
  </GET_ICBC_ID>
  </Statement>
  </ns1:MT_racf_req>
It appears as though the call into the JDBC is working, as the Oracle guys have shown me the logs (showing success) on the Oracle side.
This is my sxi_monitor entry (of that response message):
  <?xml version="1.0" encoding="utf-8" ?>
- <ns1:MT_racf_req_response xmlns:ns1="http://sap.com/xi/Z_SkillSoft">
  <Statement_response />
  </ns1:MT_racf_req_response>
Also when I look at some of the message properties I see:
  <SAP:MessageSizePayload>0</SAP:MessageSizePayload>
  <SAP:MessageSizeTotal>13243</SAP:MessageSizeTotal>
  <SAP:PayloadSizeRequest>0</SAP:PayloadSizeRequest>
  <SAP:PayloadSizeRequestMap>0</SAP:PayloadSizeRequestMap>
  <SAP:PayloadSizeResponse>179</SAP:PayloadSizeResponse>
  <SAP:PayloadSizeResponseMap>149</SAP:PayloadSizeResponseMap>
which I believe is saying that something came back in to PI as a response??  Not sure.
My Message Type definition is:
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://sap.com/xi/Z_SkillSoft" targetNamespace="http://sap.com/xi/Z_SkillSoft">
   <xsd:element name="MT_racf_req_response" type="DT_racf_req_response" />
   <xsd:complexType name="DT_racf_req_response">
      <xsd:sequence>
         <xsd:element name="Statement_response" type="DT_statement_response" />
      </xsd:sequence>
   </xsd:complexType>
   <xsd:complexType name="DT_statement_response">
      <xsd:sequence>
         <xsd:element name="ICBCID" type="xsd:string" />
      </xsd:sequence>
   </xsd:complexType>
</xsd:schema>
I have also tried inserting <row> between <Statement_response> and the ICBCID element.  Still no luck. 
I suspect something is wrong with my response message type definition, but am not seeing it. Also, am unsure how I can debug this - it appears as though Oracle side is fine, but nothing back into PI.
Any thoughts appreciated.
Keith

Answer 1

Thank you all for your response.  Some more info.:
- The stored procedure is a SELECT, so am thinking I shouldn't need the <update_count> tags mentioned.  Let me know if this assumption is incorrect.
- Because one field (ICBCID) is to be returned in the reponse, does it need to be passed in on the jdbc request ? Looking at the blogs I did not see them do that.  If so, with its IsOutput=true, or should it be IsInput=false or other? Also if it is to be passed in on the request, I guess I would set its value to a space so that the xml tag gets produced?
- Does the order of the request elements passed matter, i.e. if the ICBCID is to be passed on the request, should it be first or last in the list?  Does order of the 2 IsInput=true parameters matter (i.e. in relation to the Stored Procedure)?
- The Oracle version is 11.1, so pretty up-to-date.  Stored Procedures should work fine.
- What specifically is meant be 'resultset'?  Also, does <row> need to be added as a tag within the response xml?
Regards,
Keith