The purpose of these release notes for IBM® Informix® Object Interface for C++ Version 3.70 is to:
These release notes are not intended to be all-inclusive; they should be used as an addendum to the product manuals.
Version 3.70 of IBM Informix Object Interface for C++ is compatible with the following database servers:
| Database server | Versions |
|---|---|
| IBM Informix Dynamic Server (IDS) Enterprise Edition | 10.0, 11.10, 11.50 |
| IBM Informix Ultimate Edition | 11.50, 11.70 |
| IBM Informix Dynamic Server (IDS) Express Edition | 10.0, 11.10, 11.50 |
| IBM Informix Express Edition | 11.70 |
| IBM Informix Extended Parallel Server | 8.50 and later |
| IBM Informix OnLine | 5.20 and later |
New editions and product names
IBM Informix Dynamic Server editions were withdrawn and new Informix editions are available. Some products were also renamed. The publications in the Informix library pertain to the following products:
For more information about the Informix product family, go to http://www.ibm.com/software/data/informix/.
This section contains information you should be aware of before using the product.
The Object Interface for C++ (LIBC++) and LIBDMI driver libraries are deprecated with version 3.70.xC4. The features continue to be shipped with version 3.70, but will not be updated.
Beginning with IBM Informix Client Software Development Kit Version 2.90, the code for the C++ API has been upgraded to use the latest STL standards for C++. Although it has been tested and verified that most precompiled applications might not be required to be recompiled and rebuilt, it is recommended that you do so.
IBM Informix Object Interface for C++ provides data type conversion functions in the value interface ITConversions to enable conversion of C++ type long double. The intent is to permit fetching floating point values into C++ long double variables. However, the IBM Informix Client Software Development Kit does not allow for conversion of long double values into IBM Informix decimal or float types. Thus, Object Interface for C++ applications should always ensure that any floating literal passed to ITConversions::ConvertFrom(long double val) is within the double range. Otherwise, ConvertFrom(long double val) will return FALSE for value objects that contain SQL MONEY, FLOAT, and SMALLFLOAT values.
Object Interface for C++ is written with the assumption that a floating literal without the ANSI C++ specified suffixes l or L (example: 12.988 instead of 12.988L) assigned to a long double variable will be treated by the C++ compiler as a long double. This assumption agrees with the ANSI C++ Draft Standard (Doc No: X3J16/94-0027, WG21/N0414, 25 January 1994), which states that the type of a floating literal is double unless explicitly specified by a suffix. The suffixes f and F specify float; the suffixes l and L specify long double. Thus, the suffix l or L must be applied to a floating literal in order for it to be interpreted by the C++ compiler as a long double value.
Different versions of the Sun C++ compiler applied the ANSI C++ standard as it existed at the time of the compiler development and release. For example, Sun C++ 4.1 conforms to the ANSI standard described above, whereas pre-4.1 Sun C++ compilers always treated all floating literals, with or without the l and L suffixes, as long double values if they were assigned to a long double variable. The following C++ code example demonstrates assignment of a floating literal to a long double variable, casting to a double, and comparison between the double and long double:
long double d = 12.988; double dasd = (double) d; if( dasd == d ) return 0; else return 1;
The following table compares support for the ANSI C++ draft standard referenced above among several versions of Sun C++ compilers. The table shows how the different compiler versions evaluated the expression (dasd == d). If the expression evaluates to FALSE, the values are not equal.
| Sun C++ compiler versions | Evaluation of (dasd == d) |
|---|---|
| 4.0 (Dec 1993) | FALSE (values are not equal) |
| 4.0.1 (Jul 1994) | FALSE (values are not equal) |
| 4.1 (Oct 1995) | TRUE (values are equal) |
| 5.0 (Oct 1999) | TRUE (values are equal) |
| 6.01(2001) | TRUE (values are equal) |
A comprehensive list of the problems fixed in this release and also a list of known problems that are not yet fixed can be found in the DEFECTS document.
This section describes the known corrections and changes that need to be made to the IBM Informix Object Interface for C++ Programmer's Guide.
There are no known corrections or changes at this time.
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