Re: Q: Embedded SQL for C. Low-level calls?

>From: locks@mort.sun.ac.za (Graeme Lockley) >Date: 16 Mar 1995 07:52:01 GMT >X-Informix-List-Id: <news.12224> > >We're developing an application on Informix and more specifically, using >dynamic SQL. We have run into a few problems and have moved to a lower >level by using the commands that the preprocessor generates. At present we >have no documentation for this interface and have resorted to reverse >engineering by looking at the generated code and picking out the >functionality that we need. > >The question: Is there any documentation that discusses this interface. >I am thinking of the function prototypes and some behavioural description. >If any body else has done this sort of thing, we would like to get in touch >with them to swap notes. There is no official documentation of this interface and its direct use is not supported. Further, you need to be aware that the interface changed significantly at version 5.00. Version 4.1x and earlier versions did not provide string-named cursors and statements; Version 5.00 and later versions do provide them. Consequently, any code written for one version would have to be re-written for the other. Informix reserves the right to change the underlying calls generated for ESQL/C at any time. The actual ESQL/C language is more stable than that. Also note that in 6.0x and later, the names of the libraries used are different from those used in 5.0x and earlier versions. In case you haven't already worked it out, I'm trying to discourage you from doing this. It can be done -- you can even look in the archives of c.d.i for the prototypes which I produced -- but it is not recommended. Yours, Jonathan Leffler (johnl@informix.com) #include <disclaimer.h>