iX V6.5 (30391-90011)

460 Chapter9

Using a Remote Database

Access Through a Local Application Program

If you want to access a remote database using a local application program, you have three

methods to choose from.

• Establishing communications link and remote session interactively.

• Using the COMMAND intrinsic.

• Using a database-access ﬁle.

In all three cases, a local program accesses a remote database and the data is passed

across the communication line.

Method 1--Establishing Communications Link and Remote Session

Interactively

To use the ﬁrst method, interactively establish a communications link and a remote

session and enter a FILE equation for each remote database. The FILE equation speciﬁes

which database is to be accessed on which remote system and device. A local application

program can now access a remotely located database, as shown in Figure 9-2.

Figure 9-2. Using Method 1

For details about using this method refer to the NS3000/XL User/Programmer Reference

Manual.

Method 2--Using the COMMAND Intrinsic

The second method is very similar to the ﬁrst, but you use the MPE/iX COMMAND intrinsic

within your application program to establish the communications link, remote session and

remote database access.