You can declare SQLCA anywhere in the application program where a C variable can be declared. The scope of the structure follows C scoping rules.
If you declare SQLCA, SQLCODE, or SQLSTATE within your file, each variable must be in scope for all executable Embedded SQL statements in the file. The precompiler generates code to set each of these status variables for each Embedded SQL statement. So, if the variables are not in scope, the generated code will not compile.
If you do not declare SQLCA, SQLCODE, or SQLSTATE within the file being passed to the precompiler, you must declare SQLCODE within a referenced file. The precompiler assumes a declaration of SQLCODE, and generates code to this effect.
