MX 2.x)

ODBC/MX Client Overview

HP NonStop Open System Services ODBC/MX Client Driver—544990-002

1-3

OSS ODBC/MX Client Driver Architecture

The SQL ODBC Applications interact with the OSS ODBC/MX Client Driver to

communicate to the SQL/MX database. The ODBC server establishes a connection

between the OSS ODBC/MX Client Driver and the SQL/MX database. The ODBC

server interacts with the SQL/MX database, forwards the client requests to the

database engine, and sends the responses to the OSS ODBC/MX Client Driver.

The ODBC/MX APIs are directly exposed to the ODBC applications. The OSS

ODBC/MX Client Driver exposes a set of APIs, which calls multiple ODBC APIs

internally. These APIs depict a thin layer of driver manager to the OSS ODBC/MX

Client Driver. Minimal OSS ODBC/MX Driver Manager functionalities are included

within the Driver code.

When the ODBC client application runs the SQLConnect() function to request for a

data source (MXOSRVR), a connection is established between the OSS ODBC/MX

Client Driver and the Association Server (MXOAS). The Association Server checks the

status and the configuration details of the requested data source in the ODBCDSN file.

Meanwhile, the OSS ODBC/MX Client Driver waits for the reply from the Association

Server.

Figure 1-1. OSS ODBC/MX Client Driver Architecture on NonStop

Configuration

Server

Association

Server

ODBC

Configuration

Data

NonStop ODBC/MX Server

Components (NSK System)

Data Source 1

ODBC Server

NonStop OSS ODBC/MX Client

(NSK System)

ODBC

Application

ODBC Client

Driver

Library

TDM_Default_DataSource

ODBC Server