Re: ESQL/C C++

Informix does not publish the details of the interfaces documented in sqlhdr.h for the very good reason that they change regularly. However, the ESQL/X statements which use them do not change, so if you compile ESQL/C statements with the ESQL/C pre-processor, the correct code for your ESQL/C library will be generated. I previously published notes on how to use ESQL/C with C++ in Dec 1995 in the comp.database.informix news-group. You should head for the archives to find that information. That posting included an esql++ script which can be used for compiling ESQL/C version 4, 5, 6 or 7 with C++. There are restrictions on the C++ constructs you can use -- basically you can only use the C subset of C++ in the statements processed by the ESQL/C scanner, but you can include C++-only statements in the same file as long as they will not be interpreted by the ESQL/C scanner. I have not heard of any ESQL/C++ product plans from Informix. Yours, Jonathan Leffler (johnl@informix.com) #include <disclaimer.h> PS: If you really want to figure out conn_kw, then create an ESQL/C source file which contains representative CONNECT and DISCONNECT statements and compile them to C code, and then examine the calls to _iqconnect and _iqdisconnect. But expect the results to differ depending on which version of ESQL/C you are using. >From: allenj@ndr.com (Allen W. Jantzen) >Subject: ESQL/C C++ >Date: Mon, 20 May 1996 21:59:42 GMT >X-Informix-List-Id: <news.24158> > >I am attempting to construct C++ wrappers for ESQL/C ver 7.11. >I have the function prototypes ala SQLHDR.H, but am still confused >with some of the parameters referenced in the prototypes. For >instance: what the heck is 'int conn_kw' that is referenced in >both _iqconnect() and iqdisconnect()??? > >Does anyone have any experience doing this?? > >When is Informix going to figger out that some folks are >in C++ shops?? > >Any help appreciated. > >Allen Jantzen >allenj@ndr.com