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RELEASE NOTES FOR

INFORMIX OBJECT INTERFACE FOR C++ VERSION 2.70

Date: 9/27/99

Version: 2.70


TABLE OF CONTENTS

I. OVERVIEW OF RELEASE NOTES
II. SERVER COMPATIBILITY
III. NEW FEATURES
IV. C++ COMPILER INTERPRETATION OF LONG DOUBLES
V. KNOWN PROBLEMS
VI. FIXED PROBLEMS


I. OVERVIEW OF RELEASE NOTES

The purpose of these release notes is to make you aware of special actions that are required to configure and use Informix Object Interface for C++ on your computer. This file also describes new features and feature differences from earlier versions of this product and other Informix products and how these differences affect current products. In addition, this file contains information about known bugs and their workarounds.

This release notes document is not intended to be all-inclusive; it should be used as an addendum to the "Informix Object Interface for C++ Programmer's Guide," which provides comprehensive information about product features and product behavior.

This release notes document is for system administrators who install the Object Interface for C++ and for developers who use the Object Interface for C++ to create client applications.


II. SERVER COMPATIBILITY

This version of the Object Interface For C++ has been tested with the following Informix database servers:


III. NEW FEATURES

This release provides support for binary parameters. See "BINARY PARAMETER SUPPORT" in the Documentation Notes.


IV. C++ COMPILER INTERPRETATION OF LONG DOUBLES

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 Client SDK does not currently allow for conversion of long double values into Informix decimal or float types.

Thus, Informix 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:

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 evaluatates to FALSE, the values are not equal.

Sun C++ compiler versions Evaluation of (dasd == d )

Sun C++ 4.0 (Dec 1993) FALSE (values are not equal)

Sun C++ 4.0.1 (Jul 1994) FALSE (values are not equal)

Sun C++ 4.1 (Oct 1995) TRUE (values are equal)


V. KNOWN PROBLEMS

There are no known problems in this release.


VI. FIXED PROBLEMS

Bug 83761

Platform: all

Compiler: all

The Object Interface for C++ now correctly returns a set of UDTs when using ITRoutineManager. This is a duplicate of bug 95487.

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Bug 101347

Platform: all

Compiler: all

This is a duplicate of bug 102234, which has been fixed.

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Bug 101671

Platform: all

Compiler: all

ITLocale::ConverDate() now returns correct results.

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Bug 101676

Platform: all

Compiler: all

ITLocale::ConvertDatetime() now returns correct results.

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Bug 102234

Platform: all

Compiler: all

The ITLargeObject::Seek() now returns the correct result, which is long value.

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INFORMIX OBJECT INTERFACE FOR C++ VERSION 2.70
Version 2.70 , 9/27/99
Copyright © 1999, Informix Software, Inc. All rights reserved