AME - Tax Calculated

Here's a workaround to an issue we encountered in AME configuration for Payables Invoice Approvals:

Background:
====================
The query is from the seeded attribute: SUPPLIER_INVOICE_TAX_CALCULATED

select AP_WORKFLOW_PKG.get_attribute_value(:transactionId, null, 'SUPPLIER_INVOICE_TAX_CALCULATED', 'header') from dual

In our case, we replace the :transactionID with an invoice that the tax was calculate (ID: 54077), and the result still returns 'N', we are expecting to return 'Y'


Problem Description:
====================
Invalid condition in the following: (It always returns 'N')

select AP_WORKFLOW_PKG.get_attribute_value(54077, null, 'SUPPLIER_INVOICE_TAX_CALCULATED', 'header') from dual

ELSIF p_attribute_name= 'SUPPLIER_INVOICE_TAX_CALCULATED' THEN

SELECT sum(decode(tax_already_calculated_flag, 'Y',
1, 0)), count(line_number)
INTO l_sum_calc, l_line_count
FROM ap_invoice_lines_all
WHERE invoice_id = p_invoice_id
AND line_type_lookup_code not in ('TAX','AWT');

IF l_sum_calc >0 and l_sum_matched = l_line_count THEN
l_return_val := 'Y';
ELSE
l_return_val := 'N';

Summary:
====================
In plain English terms, the l_sum_matched is not defined in the package at this point in the procedure and therefore always returns 'N'


Workaround:
====================
Update the seeded attribute with the following:

SELECT decode(sum(decode(tax_already_calculated_flag, 'Y',1, 0)),count(line_number),'Y','N')
FROM ap_invoice_lines_all
where invoice_id = :transactionId
and line_type_lookup_code <> 'TAX'

I would not be able to have done this all by myself, so I will not take full credit here - I have to say thank to my colleague here: Thanks JB (and not the Scotch JB)