Host variables are variables that are used in embedded SQL statements to exchange values between the application program and the database instance .
Observe the following points when you use host variables:
· Declare the host variables in the declare section. When you do this you can use data types predefined by the precompiler, as well as C/C++ basic data types.
See also: Permitted Data Types
· Observe the conventions for host variables. You can also use structures and arrays in host variables. You can generate structure definitions from database tables and database procedures.