Mission critical applications developed with Xbase⁺⁺ are using an innovative technology from Alaska Software to abstract the application from the underlying database management system. The Alaska ADS-DatabaseEngine makes use of this unique technology to give Xbase⁺⁺ developers transparent access to the Advantage Database Server. This way Xbase⁺⁺ applications can instantly become Client/Server Applications using state of the art technology.

Dynamic DBMS usage
Using Alaska Software's innovative DatabaseEngine Technology, the ADS-DatabaseEngine can be loaded at application runtime to access an Advantage Database Server. This results in a freedom of choice. The developer can decide to deploy applications supporting Clipper compatible DBF/NTX tables or Client/Server databases managed by the Advantage Database Server.

Remote and local data
You can load as many different DatabaseEngines in your application as you want. In addition, you can mix feature sets of different DatabaseEngines to dynamically build your own DatabaseEngine at runtime. For example, you can use the ADS-DatabaseEngine for network data and the FOXDBE of Alaska Xbase++ to run local queries simultaneously.

Transaction processing and session support
The ADS-DatabaseEngine contains parts of the forthcoming Data Access Chain (DAC) technology of Alaska Software. With DAC technology you have access to Client/Server features like session management and user authentication, transaction processing, and local support in form of codepages and collation table setup.

Technical data

Datatypes supported:

Description

Double
Character (text) *
Character (binary)
Date
Float
Long signed integer
Logical
Memo (text) *
Memo (binary)
Numeric N 1-32 *

*Data is converted according to
SET CHARSET

Field type

B
C
C
D
F
I
L
M
M
N

Length

8
max. 64 KB
max. 64 KB
8
1-32
4
1
4 or 10
4 or 10
1-32

Specifications:

• Max. length for alias names is 10 characters
• Max. length for field names is 10 characters
• Max. number of 15 open index files per work area
• Max. number of 50 tags in CDX files
• Supported data types for index, filter, and FOR expressions are C D L N
• Max. password length for data encryption is 8 characters
• Multiple sessions per process
• Multiple sessions per thread
• Multi-threading support
• CDX and NTX storage