1. Sub query in above SP, pulling all open amount value from PO and added. So that, SP blocks the PO.
2. To further filter above SP, we can add POR1.linestatus = 'O' to pull only open line items for open sum calculation.
3. Still not clear with budget value. For example, i will enter budget values first PO and add PO. second PO again need to enter budget values.....so every time we need to budget value? If user forget budget value, there is no block of PO.
