How to add ESQL function calls to the Informix Access Library

To add additional ESQL/C calls you need to edit two files: infesql.ec and infesql.h. In infesql.ec, you need to create a wrapper function that calls the ESQL/C code you want to use. For example:

void esqlBreakCall(int timeout)
{
	sqlbreakcallback(timeout, callback);
}

Function esqlBreakCall() takes an argument of a timeout value (in milliseconds) and passes that argument to the ESQL/C function sqlbreakcallback().

You then need to add declarations for your new functions to the file infesql.h.

After these two changes are made, the Informix Access Library will need to be re-complied. Upon completion of this step, your new functions will be a part of the Informix Access Library and available to call.

You need to #include the infesql.h file in your source code to give the preprocessor knowledge of your function declarations. You also need to add the Informix Access Library File (i.e. -libinf7d) to your link line for the definition of custom functions.

A few Informix directories will need to be included in your project/makefile.

Additional Include Directory

• $INFORMIXDIR/incl/esql

Additional Library Directories

• $INFORMIXDIR/lib/esql
• $INFORMIXDIR/lib