Problem in using oraext:query-database() command in xslt

Question

Hi,
I am querying a function through the query-database() command in a certain xslt within a BPEL Process as below:
<xsl:variable name="Corporation">
                <xsl:value-of select="string('CORPORATION')"/>
  </xsl:variable>
<xsl:variable name="CustAccIdFrmDB">
                <xsl:value-of select='orext:query-database(concat("select xx_egytrans_integration.get_xid(",$getCustAccID,",",$Corporation,") from dual"),false(),false(),string("jdbc/otmdatasource"))'/>
</xsl:variable>
But, after deploying the BPEL Process and while running it, I am getting error at run-time.
Below is the error,
<bpelFault><faultType>0</faultType><subLanguageExecutionFault xmlns="http://schemas.oracle.com/bpel/extension"><part name="summary"><summary>XPath expression failed to execute. An error occurs while processing the XPath expression; the expression is ora:doXSLTransformForDoc('xsl/Transformation__CustomerUpdate.xsl', $Invoke_getProfileOptions_getProfileOptions_OutputVariable.getProfileOptionsOutputCollection, 'Invoke_CustomerUpdateProc_Customer_UpdateProc_OutputVariable.OutputParameters', $Invoke_CustomerUpdateProc_Customer_UpdateProc_OutputVariable.OutputParameters, 'Invoke_CustAccProc_getCustAccID_OutputVariable_1.OutputParameters', $Invoke_CustAccProc_getCustAccID_OutputVariable_1.OutputParameters, 'Invoke_GetCustTaxExempt_getCustTaxExempStatus__Update_OutputVariable.OutputParameters', $Invoke_GetCustTaxExempt_getCustTaxExempStatus__Update_OutputVariable.OutputParameters, 'Invoke_getCustContactUpd_get_cust_acc_site_contactUpd_OutputVariable.OutputParameters', $Invoke_getCustContactUpd_get_cust_acc_site_contactUpd_OutputVariable.OutputParameters). The XPath expression failed to execute; the reason was: javax.xml.transform.TransformerException: XML-22900: (Fatal Error) An internal error condition occurred.. Check the detailed root cause described in the exception message text and verify that the XPath query is correct. </summary></part><part name="code"><code>XPathExecutionError</code></part></subLanguageExecutionFault></bpelFault>
Could you please let me know the probable reason for the error? Please help at the earliest.
Thanks,
Promit

Answer 1

Hi Anshul,
Thanks for replying.
The query upon executing in SQL Plus returns proper value. The result is either a concatenated string or 'NO_DATA'.
Please note that: $getCustAccID --> x-path expression and $Corporation --> hardcoded value - 'CORPORATION'.
I have tried formatting the string of the query in various ways, but no luck.. In all cases the error is same.
Waiting for your reply.
Thanks in advance..
Regards,
Promit