How to use multiple xmlforest() function within xmlagg() function

Question

I need to create following XML structure by reading multiple tables from DB .
The tables are relational and joined by keys.
<Invoice>
<CaseOrdrId>0000022359</CaseOrdrId>
<Id>100065117</Id>
<Prescription>
<CaseOrdrItmId>0000005684</CaseOrdrItmId>
<RxId>1104900686</RxId>
<Prescriber>
     <CasePartyIdDEA>0000000000</CasePartyIdDEA>
     <CasePartyIdNPI>0000000000</CasePartyIdNPI>
     <CasePartyIdSLic>0000000000</CasePartyIdSLic>
     </Prescriber>
     <PatInfo>
          <CasePartyId>0000000000</CasePartyId>
          </PatInfo>
</Prescription>
</Invoice>
<Invoice>
<Invoice>
<Invoice>
<Invoice>
<Invoice> tag can repeat 5times , So,I am using xmlagg().
To create the tree structure within <Invoice> I am using multiple xmlforest().
But getting error : SQL Error: ORA-06553: PLS-306: wrong number or types of arguments in call to 'SYS_IXMLAGG' . code added today marked in yellow.
Any help on this would be really helpful.

Answer 1

Hi , I could fix the previous issue with xmlagg().
My query is as follows :
select
xmlelement( "Response", xmlforest( b.StatusCode as "StatusCode", b.StatusMessage as "StatusMessage",
b.ServiceAction as "ServiceAction",
select
xmlforest( a.id as "Id", a.ExternalId as "ExternalId", a.Source as "Source", a.UserID as "UserID", xmlforest(b.id as
"Id")"Note", xmlforest(
select
Xmlforest(P.Case_Party_Id As "CasePartyId",Xmlelement("CaseGeoAddrId",S.Address_Id )as "Address"
from
v44139.party p,
v44139.patient_address s
where
p.case_party_id = s.case_party_id
and p.party_id_type_cde = 'MBR'
AND s.individual_agn_id = 0
) as "Membership")"Group",
select
xmlagg(xmlelement("Invoice",xmlelement( "CaseOrdrId",d.case_order_id),
xmlelement("Id" ,d.invoice_nbr) ,xmlelement("Prescription",
xmlforest(e.case_order_item_id as "CaseOrdrItmId", e.rx_nbr as "RxId"),
xmlelement("Prescriber",
xmlforest(169629 as "CasePartyIdDEA", 169630 as "CasePartyIdNPI",169631
as "CasePartyIdSLic")),xmlelement("PatInfo",xmlforest(e.case_party_id as "CasePartyId") )) ) )
--AS ID
from
v44139.patient_order d ,
v44139.order_rx e
where
d.case_id = a.id
and d.case_order_id = e.case_order_id
as "Invoice"
from
select
'142' as id,
'CMRT' as source,
'V44042' as userid,
'EMG-7788' as externalid ,
361 as case_party_id
from
dual
a
"Case") ) as "XML_QUERY"
from
select
200 as statuscode,
'SUCCESS' as statusmessage,
'0000000000' as id,
'Update' serviceaction
from
dual
b;
===============================================================================================
The result is as follows :
<Response><StatusCode>200</StatusCode><StatusMessage>SUCCESS</StatusMessage><ServiceAction>Update</ServiceAction><Case><Id>142</Id><ExternalId>EMG-7788</ExternalId><Source>CMRT</Source><UserID>V44042</UserID><Note><Id>0000000000</Id></Note><Group><Membership><CasePartyId>382</CasePartyId><Address><CaseGeoAddrId>144</CaseGeoAddrId></Address></Membership></Group_*><Invoice><Invoice><*_CaseOrdrId>202</CaseOrdrId><Id>999999993                                         </Id><Prescription><CaseOrdrItmId>105</CaseOrdrItmId><RxId>1118800008</RxId><Prescriber><CasePartyIdDEA>169629</CasePartyIdDEA><CasePartyIdNPI>169630</CasePartyIdNPI><CasePartyIdSLic>169631</CasePartyIdSLic></Prescriber><PatInfo><CasePartyId>382               </CasePartyId></PatInfo></Prescription></Invoice><Invoice><CaseOrdrId>203</CaseOrdrId><Id>825478795                                         </Id><Prescription><CaseOrdrItmId>106</CaseOrdrItmId><RxId>1118800005</RxId><Prescriber><CasePartyIdDEA>169629</CasePartyIdDEA><CasePartyIdNPI>169630</CasePartyIdNPI><CasePartyIdSLic>169631</CasePartyIdSLic></Prescriber><PatInfo><CasePartyId>382               </CasePartyId></PatInfo></Prescription></Invoice><Invoice><CaseOrdrId>204</CaseOrdrId><Id>999999992                                         </Id><Prescription><CaseOrdrItmId>107</CaseOrdrItmId><RxId>1118800007</RxId><Prescriber><CasePartyIdDEA>169629</CasePartyIdDEA><CasePartyIdNPI>169630</CasePartyIdNPI><CasePartyIdSLic>169631</CasePartyIdSLic></Prescriber><PatInfo><CasePartyId>382               </CasePartyId></PatInfo></Prescription></Invoice><Invoice><CaseOrdrId>205</CaseOrdrId><Id>999999991                                         </Id><Prescription><CaseOrdrItmId>108</CaseOrdrItmId><RxId>1118800006</RxId><Prescriber><CasePartyIdDEA>169629</CasePartyIdDEA><CasePartyIdNPI>169630</CasePartyIdNPI><CasePartyIdSLic>169631</CasePartyIdSLic></Prescriber><PatInfo><CasePartyId>382               </CasePartyId></PatInfo></Prescription></Invoice></Invoice></Case></Response>
The ISSUE : <Invoice> tag repeating twice in 3 rd line . How to correct this ?