About this book

This book, the Open Client Client-Library Migration Guide, contains information on how to migrate Open Client™ DB-Library™ applications to Open Client Client-Library™.

Audience

This book has a dual audience:

• Managers or other decision makers who will decide whether to migrate a particular DB-Library application to Client-Library.

• Experienced DB-Library programmers who will perform the migration.

How to use this book

The following table describes the chapters in this book:

Return code error checking in code fragments

This book contains a number of code fragments taken from the set of migration example programs that Sybase provides on the World Wide Web.

The example fragments in this book use the EXIT_ON_FAIL() example macro, which is as follows. Macros similar to this can simplify return code error checking. However, this macro is not appropriate for every situation.

/*
** Define a macro that exits if a function return code indicates
** failure. Accepts a CS_CONTEXT pointer, a Client-Library
** or CS-Library return code, and an error string. If the
** return code is not CS_SUCCEED, the context will be 
** cleaned up (if it is non-NULL), the error message is
** printed, and we exit to the operating system.
*/

#define EXIT_ON_FAIL(context, ret, str) \
  { if (ret != CS_SUCCEED) \
  { \
    fprintf(stderr, \
            "Fatal error: %s\n", str); \
    if (context != (CS_CONTEXT *) NULL) \
    { \
      (CS_VOID) ct_exit(context, CS_FORCE_EXIT); \
      (CS_VOID) cs_ctx_drop(context); \
    } \
    exit(ERROR_EXIT); \
  } }

Conventions

DB-Library and Client-Library routine syntax is shown in a bold, monospace font:

CS_RETCODE ct_init(context, version)

     CS_CONTEXT  *context;
     CS_INT      version;

Program text and computer output are shown in a monospace font:

ct_init(mycontext, CS_VERSION_100);

Routine names and Transact-SQL® keywords are written in a narrow, bold font:

ct_init, the select statement.

World Wide Web access

The migration example programs can be found on the Sybase World Wide Web page (http://www.sybase.com).

The README file provided with the migration examples contains a descriptive list of the example files.

Related documents

Sybase documents Client-Library and DB-Library in a variety of references and guides. Table 2 lists Client-Library and DB-Library manuals.

Other sources of information

Use the Sybase Getting Started CD, the Sybase Technical Library CD and the Technical Library Product Manuals Web site to learn more about your product:

• The Getting Started CD contains release bulletins and installation guides in PDF format, and may also contain other documents or updated information not included on the Technical Library CD. It is included with your software. To read or print documents on the Getting Started CD you need Adobe Acrobat Reader (downloadable at no charge from the Adobe Web site, using a link provided on the CD).

• The Technical Library CD contains product manuals and is included with your software. The DynaText reader (included on the Technical Library CD) allows you to access technical information about your product in an easy-to-use format.

  Refer to the Technical Library Installation Guide in your documentation package for instructions on installing and starting the Technical Library.

• The Technical Library Product Manuals Web site is an HTML version of the Technical Library CD that you can access using a standard Web browser. In addition to product manuals, you will find links to EBFs/Updates, Technical Documents, Case Management, Solved Cases, newsgroups, and the Sybase Developer Network.

  To access the Technical Library Product Manuals Web site, go to Product Manuals.

Sybase certifications on the Web

Technical documentation at the Sybase Web site is updated frequently.

Finding the latest information on product certifications

1. Point your Web browser to Technical Documents.

2. Select Products from the navigation bar on the left.

3. Select a product name from the product list and click Go.

4. Select the Certification Report filter, specify a time frame, and click Go.

5. Click a Certification Report title to display the report.

Creating a personalized view of the Sybase Web site (including support pages)

Set up a MySybase profile. MySybase is a free service that allows you to create a personalized view of Sybase Web pages.

1. Point your Web browser to Technical Documents.

2. Click MySybase and create a MySybase profile.

Sybase EBFs and software maintenance

Finding the latest information on EBFs and software maintenance

1. Point your Web browser to the Sybase Support Page.

2. Select EBFs/Maintenance. Enter user name and password information, if prompted (for existing Web accounts) or create a new account (a free service).

3. Select a product.

4. Specify a time frame and click Go.

5. Click the Info icon to display the EBF/Maintenance report, or click the product description to download the software.

If you need help

Each Sybase installation that has purchased a support contract has one or more designated people who are authorized to contact Sybase Technical Support. If you cannot resolve a problem using the manuals or online help, please have the designated person contact Sybase Technical Support or the Sybase subsidiary in your area.

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Copyright © 2003. Sybase Inc. All rights reserved.

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