Returns type of link if field is a linking key, blank if field is not a linking key.
The .LINK_TYPE_GET() method returns the type of set link that the field represents.
The following illustration shows the structure of the invoice set.
The following example shows that in the invoice set the customer_id field is a linking field that connects the customer table one-to-one ("First") to the invoice_header table. The invoice_number field links the invoice_items table many-to-one ("Many") to the invoice_header table.
dim tbl as P dim fld as P tbl = table.open("invoice.set") fld = tbl.field_get("customer_id") ? fld.link_table_get() = "CUSTOMER" ? fld.link_type_get() = "First" fld = tbl.field_get("invoice_number") ? fld.link_table_get() = "INVOICE_ITEMS" ? fld.link_type_get() = "Many"