To create an SPL routine that does not
return values, start with the CREATE PROCEDURE statement and end with
the END PROCEDURE keyword. The following figure shows how to begin
and end an SPL procedure.Figure 1: Begin and end an SPL procedure.
CREATE PROCEDURE new_price( per_cent REAL )
. . .
END PROCEDURE;
For more information about naming conventions, see the
Identifier segment in the Informix® Guide to SQL:
Syntax.
To
create an SPL function that returns one or more values, start with
the CREATE FUNCTION statement and end with the END FUNCTION keyword.
The following figure shows how to begin and end an SPL function.Figure 2: Begin and
end an SPL function.
CREATE FUNCTION discount_price( per_cent REAL)
RETURNING MONEY;
. . .
END FUNCTION;
In
SPL routines, the END PROCEDURE or END FUNCTION keywords are required.
Important: For compatibility with earlier HCL Informix products,
you can use CREATE PROCEDURE with a RETURNING clause to create a user-defined
routine that returns a value. Your code will be easier to read and
to maintain, however, it you use CREATE PROCEDURE for SPL routines
that do not return values (SPL procedures) and CREATE FUNCTION for
SPL routines that return one or more values (SPL functions).