coracle-pro-cembedded-sql

Can I use an SQL DECLARE section at global scope in Pro*C?

I am trying to port a ~2000 line Pro*C program to C++ (Pro*C++). It is full of global variables being used as host variables in SQL queries:

char var1;
char var2;

int execute_query() {

    // some code

    EXEC SQL SELECT ... INTO :var1
    EXEC SQL SELECT ... INTO :var2

    // some code

}

However, with code=cpp in the precompiler options, the PARSE option is set to PARTIAL, meaning the precompiler only recognises host variables declared in a DECLARE section.

Can I just surround the global variables with a declare section?

EXEC SQL BEGIN DECLARE SECTION

   char var1;
   char var2;

EXEC SQL END DECLARE SECTION

int execute_query() {

    // some code

    EXEC SQL SELECT ... INTO :var1
    EXEC SQL SELECT ... INTO :var2

    // some code

}

If not, is there another way to make the precompiler recognise the global variables without doing a lot of refactoring?

Solution

  • Yes, you can.

    After much fiddling around, I finally managed to create a standalone Pro*C program to test this out, and I can confirm that it works.