Simple Variables
A simple scalar-valued variable (integer, real or character string) is referred to by the syntax:
:simplename
Syntax Notes:
• If you use the variable to send values to Ingres, it can be any scalar-valued variable or constant.
• If you use the variable to receive values from Ingres, it can only be a scalar-valued variable.
• The reference to an uninitialized BASIC dynamic string variable in an embedded statement that assigns the value of that string to Ingres results in a runtime error because an uninitialized dynamic string points at a zero address. This restriction does not apply to the retrieval of data into an uninitialized dynamic string variable.
The following program fragment demonstrates a typical message-handling routine that has two scalar valued variables, "buffer" and "seconds."
100 sub message_handle
exec sql include sqlca
exec sql begin declare section
declare string buffer = 50
declare integer seconds
exec sql end declare section
...
exec frs message :buffer
exec frs sleep :seconds
...
end sub