Chapter 3 Host Variables

Host variables are variables used to pass the following information between an application program and ALLBASE/SQL:

All host variables used in a C program must be declared in declaration parts of the program. The type descriptions of host variables must be compatible with ALLBASE/SQL data types. The type descriptions of host variables must also satisfy certain preprocessor criteria.

This chapter identifies where in a C program you can use host variables and then discusses how to write type descriptions that complement the way host variables are used. See the chapter, "Simple Data Manipulation", for a sample program that uses host variables.