DS_Alias database parameter
When you access an SAP Adaptive Server Enterprise database
in PowerBuilder through Open Client, DS_Alias is one of several
parameters that you can set to enable network-based directory services
in your application. (For other directory services parameters, see
the See Also section.)
Some directory service providers and drivers support the creation
of alias entries. An alias entry provides
a link to a primary directory entry in a hierarchy, thereby giving
users multiple ways to access the primary entry while searching
the directory structure for a particular network entity.
For those directory service providers and drivers that support
aliases, DS_Alias specifies whether the provider is allowed
to follow links for (expand) alias entries while searching the directory
hierarchy. The default behavior is to allow expansion of alias entries
for providers that support this feature.
You must specify a value for DS_Alias before connecting
to the database in PowerBuilder.
For information about the third-party directory
service providers and operating system platforms that Sybase has
tested with Open Client directory services, see the Open Client
ASE, SYC SAP Adaptive
For those directory services providers
When to use
To prevent access to your data through directory alias entries, set
DS_Alias to 0. This prohibits directory service providers
that support aliases from expanding alias entries during a directory
Set Release parameter
For this parameter to take effect, you must also
set the Release parameter to 11or higher to specify that your application
should use the appropriate version of Sybase Open Client Client–Library
(CT-Lib) behavior. See the description of the Release parameter
for more information.
Requirements for use
To use DS_Alias or any other parameter supporting Open
Client directory services, you must meet certain requirements for
using directory services in your PowerBuilder application. For details,
see “Requirements for using Open Client directory services” in Connecting
to Your Database.
Corresponding CT-Lib connection property
Specifying a value for DS_Alias sets the corresponding
Sybase CT-Lib connection property named CS_DS_EXPANDALIAS.
To prohibit directory service providers that support
aliases from expanding alias entries during a directory search:
Clear the Directory Alias Entries check box on the Directory
Services page in the Database Profile Setup dialog box.
Type the following in code:PowerBuilder1SQLCA.DbParameter="DS_Alias=0"