Pop.Select subroutine
Description
Restores a previously active select list, saved by the Push.Select subroutine, into Cursor 0.
Syntax
Pop.Select(f1, f2, f3, f4)
Parameters
The Pop.Select subroutine has the following parameters:
| Parameter | Description | |
|---|---|---|
| f1 | Reserved. | |
| f2 | Contains the list of record keys in the active select list | |
| f3 | Contains the file variable for the table referenced in the active select list. | |
| f4 | Reserved | |
See Also
Example
declare function Set_FSError
declare subroutine push.select, pop.select
open "CUSTOMERS" To customers_table else
status = Set_FSError()
return
end
open 'INVOICES' to invoices_table else
status = Set_FSError()
return
end
select customers_table
Done = 0
loop
ReadNext @ID else Done = 1
Until Done Do
read @RECORD From customers_table, @ID else
status = Set_FSError()
return
end
* processing logic here ...
GoSub PROCESS_CUSTOMER
Repeat
return 0
PROCESS_CUSTOMER:
/* process the customer row */
call push.select(f1, f2, f3, f4)
gosub PROCESS_CUSTOMER_INVOICES
call pop.select (f1, f2, f3, f4)
return
PROCESS_CUSTOMER_INVOICES:
/* process the invoices for a customer */
/* can use cursor 0 to do SELECT and READNEXT */
/* for example, the SELECT below will not destroy the SELECT */
/* on the CUSTOMERS table */
select invoices_table
return