UniBasic Commands Reference - Rocket Software

STATUS Function Return Values
After you execute SELECTINDEX, the STATUS function returns one of the values
described in the following table.
Value Description
0 The select list is loaded with alternate key values or record IDs for the specified
file.
1 No alternate index key exists for this attribute using the name specified. The select
list is empty.
STATUS Function Return Values
Examples
The following program creates a select list based on alternate index LNAME, and
then reads the record using the first ID retrieved from that list:
OPEN 'CLIENTS' TO CLIENT.FILE ELSE ABORT
SELECTINDEX 'LNAME' FROM CLIENT.FILE TO 2
PRINT @(-1)
READNEXT ID FROM 2 THEN
READ REC FROM CLIENT.FILE, ID THEN
PRINT @(5,I):REC:@(20,I):REC
END ELSE
PRINT "CANNOT FIND RECORD":ID
END
CLEARSELECT
END
In the following example, SELECTINDEX uses the alternate key index LNAME and
creates a list of all the last names contained in the CLIENTS file:
SELECTINDEX "LNAME" FROM CLIENTS
In the next example, SELECTINDEX uses the alternate key value “Smith” and
creates a list of all occurrences of Smith contained in the CLIENTS file:
SELECTINDEX "LNAME","Smith" FROM CLIENTS
SELECTINDEX 1-707