This note gives a general idea of how records are stored in and moves through the EBS Payables module.
In Oracle Payables, before an AP transaction can be generated, a supplier must exist in the system. Suppliers are created in AP_SUPPLIERS and AP_SUPPLIER_SITES. Invoices are saved in AP_INVOICES (invoice header) and AP_INVOICE_LINES (invoice lines).
Payments generate records in AP_INVOICE_PAYMENTS and AP_PAYMENTS_SCHEDULE. These tables will have 1 record for an invoice if the invoice is paid using a single payment, but will have multiple records for an invoice if the invoice is paid in installments or with more than one payment.
When an invoice is approved and when it is paid, accounting transactions are generated. These transactions make their way to the GL_INTERFACE table via Payables Transfer to GL process.
Invoices can be entered into Oracle Payables from external systems via the AP_INVOICE_INTERFACE and AP_INVOICES_LINES_INTERFACE tables. When the Payables Open Interface Import program is run, the records are brought into the regular header and lines tables (AP_INVOICE and AP_INVOICE_LINES). When payments are made, the information about the payment is recorded in AP_CHECKS.