<DataSource
        ID="aggregationCustomSQL2_orderItem"
        serverType="sql"
        tableName="aggregation_orderItem"
        useAnsiJoins="true"
>
    <fields>
        <field name="pk" type="sequence" primaryKey="true" hidden="false" />
        <field name="orderID" type="integer" canEdit="false" foreignKey="aggregationCustomSQL2_order.orderID" />
        <field name="orderCustomerName" type="text" canEdit="false" includeFrom="aggregationCustomSQL2_order.customerName"/>
        <field name="itemDescription" type="text" />
        <field name="quantity" type="integer" />
        <field name="unitPrice" type="float" />
        <field name="amount" type="float" customSQLExpression="quantity*unitPrice" format="#,##0.00" />
    </fields>
    <operationBindings>
        <operationBinding operationType="fetch" useHavingClause="false">
            <groupBy>orderCustomerName,itemDescription</groupBy>
            <summaryFunctions>
                <quantity>sum</quantity>
                <amount>sum</amount>
            </summaryFunctions>
            <customSQL><![CDATA[
                SELECT *
                 FROM (SELECT orderCustomerName, avg(amount) as amount
                        FROM (SELECT $defaultSelectClause
                                FROM $defaultTableClause $defaultAnsiJoinClause
                               WHERE $defaultWhereClause
                            GROUP BY $defaultGroupClause) first
                        WHERE $sql.havingWithout("amount", "itemDescription")
                        GROUP BY orderCustomerName) second
                WHERE $sql.partialHaving("amount")
            ]]></customSQL>
        </operationBinding>
    </operationBindings>
</DataSource>