How to operate multiple querys using DB Adapter and 'Execute Custom SQL'

Question

I have a requirment that I need to create database adapter in your BPEL process with 'Execute Custom SQL' to operate multiple query in DB in one atomic
here are the details:
inbound request:
<ns1:Query_bpelProcessRequest>
<ns1:input>
<ns1:ItemDetail>
<ns1:ItemID>1123DDDS</ns1:ItemID>
</ns1:ItemDetail>
<ns1:ItemDetail>
<ns1:ItemID>1126EWWA</ns1:ItemID>
</ns1:ItemDetail>
<ns1:ItemDetail>
<ns1:ItemID>11208FSAA</ns1:ItemID>
</ns1:ItemDetail>
</ns1:input>
</ns1:Query_bpelProcessRequest>
I use for-each fuction in XSLT to mapping the all ItemID value:
<xsl:template match="/">
<xsl:for-each select="/tns:Query_bpelProcessRequest/tns:input/tns:ItemDetail">
<ns1:QueryFromDB_Input>
<ns1:ItemID>
<xsl:value-of select="tns:ItemID"/>
</ns1:ItemID>
</ns1:QueryFromDB_Input>
</xsl:for-each>
</xsl:template>
and in DB Adapter I use the 'Execute Custom SQL' to query the CONTENT value according the ItemID value:
select distinct CONTENT from agile.item where ITEM_NUMBER=’<ItemID>’
However, in the result, It only query the first item value for <ns1:ItemID>1123DDDS</ns1:ItemID>
<<QueryFromDB_InputVariable><part xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="QueryFromDB_Input_msg">
<QueryFromDB_Input xmlns:ns1="http://xmlns.oracle.com/pcbpel/adapter/db/QueryFromDB" xmlns="http://xmlns.oracle.com/pcbpel/adapter/db/QueryFromDB">
<ns1:ItemID>1123DDDS</ns1:ItemID>
</QueryFromDB_Input>
</part></QueryFromDB_InputVariable>
<QueryFromDB_OutputVariable><part xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="QueryFromDB_OutputCollection">
<QueryFromDB_OutputCollection xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.oracle.com/pcbpel/adapter/db/QueryFromDB">
<QueryFromDB_Output>
<ITEM_NUMBER>1123DDDS</ITEM_NUMBER>
<CONTENT >SJIFESSFFJ</CONTENT >
</QueryFromDB_Output>
</QueryFromDB_OutputCollection>
</part></QueryFromDB_OutputVariable>
the other two querys are not operated.
what can I do to operate multiple querys??
Thanks

Answer 1

Hi Rod,
I are using while loop and assign array inputvalue to the inputvarable of DBadapter now, but actually it doesn't work.
Throw expection
<selectionFailure xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/"><part name="summary"><summary>XPath query string returns multiple nodes.
According to BPEL4WS spec 1.1 section 14.3, The assign activity part and query /client:ItemsQuery_bpelProcessRequest/client:input/client:inputDetail/client:ProductID["ItemIndex"] should not return multipe nodes.
Please check the BPEL source at line number "89" and verify the part and xpath query /client:ItemsQuery_bpelProcessRequest/client:input/client:inputDetail/client:ProductID["ItemIndex"].
Possible reasons behind this problems are: some xml elements has maxOccurs > 1 or the xml data is invalid according to XML Schema.
To verify whether XML data received by a process is valid, user can turn on validateXML switch at the domain administration page.
</summary>
</part></selectionFailure>
my inbound XSD:
<element name="ItemsQuery_bpelProcessRequest">
<complexType>
<sequence>
<element name="input" type="tns:inputType"/>
</sequence>
</complexType>
</element>
<complexType name="inputType">
<sequence>
<element name="inputDetail" minOccurs="0" maxOccurs="unbounded">
<complexType>
<sequence>
<element name="ProductID" type="string" minOccurs="0"/>
</sequence>
</complexType>
</element>
</sequence>
</complexType>
<element name="ItemsQuery_bpelProcessResponse">
<complexType>
<sequence>
<element name="result" type="tns:outputType"/>
</sequence>
</complexType>
</element>
<complexType name="outputType">
<sequence>
<element name="ItemOutput" minOccurs="0" maxOccurs="unbounded">
<complexType>
<sequence>
<element name="item_id" type="string" minOccurs="0"/>
</sequence>
</complexType>
</element>
</sequence>
</complexType>
DB Adapter XSD:
<xs:schema targetNamespace="http://xmlns.oracle.com/pcbpel/adapter/db/QueryItem" xmlns="http://xmlns.oracle.com/pcbpel/adapter/db/QueryItem" elementFormDefault="qualified" attributeFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="QueryItem_Input" type="QueryItem_Input"/>
<xs:complexType name="QueryFrom_Input">
<xs:sequence>
<xs:element name="ProductID" type="xs:string" nillable="true"/>
</xs:sequence>
</xs:complexType>
<xs:element name="QueryItem_OutputCollection" type="QueryItem_OutputCollection"/>
<xs:complexType name="QueryItem_OutputCollection">
<xs:sequence>
<xs:element name="QueryItem_Output" type="QueryItem_Output" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="QueryItem_Output">
<xs:sequence>
<xs:element name="item_id" type="xs:string" nillable="true"/>
</xs:sequence>
</xs:complexType>
</xs:schema>
the bpel assign:
<assign name="Initial_Index">
<copy>
<from expression="0"/>
<to variable="ItemIndex"/>
</copy>
</assign>
<while name="While_1"
condition="bpws:getVariableData('ItemIndex')&lt;ora:countNodes('inputVariable','payload','/client:ItemsQuery_bpelProcessRequest/client:input/client:inputDetail/client:ProductID)">
<sequence name="Sequence_1">
<assign name="Assign_QueryInput">
<copy>
<from variable="inputVariable" part="payload"
query='/client:ItemsQuery_bpelProcessRequest/client:input/client:inputDetail/client:ProductID{bpws:getVariableData('ItemIndex')}'/>
<to variable="QueryItem_InputVariable"
part="QueryItem_nput_msg"
query="/ns2:QueryItem_Input/ns2:ProductID"/>
</copy>
</assign>
<invoke name="Invoke_QueryDB" partnerLink="QueryItem"
portType="ns1:QueryItem_ptt"
operation="QueryItem_PSFT"
inputVariable="QueryItem_InputVariable"
outputVariable="QueryItem_OutputVariable"/>
<assign name="Assign_Output">
<copy>
<from variable="QueryItem_OutputVariable"
part="QueryItem_OutputCollection"
query="/ns2:QueryItem_OutputCollection/ns2:QueryItem_Output/ns2:item_id"/>
<to variable="outputVariable" part="payload"
query='/client:ItemsQuery_bpelProcessResponse/client:result/client:ItemOutput/client:item_id{bpws:getVariableData('ItemIndex')}'/>
</copy>
<copy>
<from expression="bpws:getVariableData('ItemIndex')+1"/>
<to variable="ItemIndex"/>
</copy>
</assign>
</sequence>
</while>
I use {} instead of  []  for array,  because [] seams not reveal in this message board
seems I can't assign array values to the DB inputvalue, Are there any solutions for this ?
I still haven't found any way for operating multiple querys using DB Adapter.
Thanks
Edited by: user1065212 on 07-Jan-2010 19:39
Edited by: user1065212 on 07-Jan-2010 19:41
Edited by: user1065212 on 07-Jan-2010 19:44
Edited by: user1065212 on 07-Jan-2010 19:45