User Guide

SAP AG November 2002
DBM operators are not database users [Page
136]. You need to create database
users in order to work on a database instance.
Database Name
In principle, the name of a database instance [Page 132] is freely definable, but must meet
the following conditions:
• The maximum length of a database name is 8 characters.
• The database name can contain the characters from the 7-bit ASCII character set.
• The database name can start with a letter or a number.
• The SAP DB database system does not differentiate between upper and lower case.
Database Parameters
To initialize the database parameters, use is generally made of the default configuration
which was stored when the database software was installed.
The configuration generated by the system will always be runnable. If necessary, you can still
adjust the database parameters originally set to suit any specific requirements you may have.
Alternatively you can use the configuration of a database instance [Page 132] already present
on the computer or the configuration from a data backup [Page 131]. Even after this you can
still adjust the database parameters to suit your own requirements.
The database parameters are divided into general database parameters [Page 79], special
database parameters [Page 80] and support database parameters [Page 80].
Display or change database parameters
You can use the Database Manager [Page 133] to display or change database parameters.
See:
Database Manager GUI: SAP DB 7.4, Section Displaying and Changing Current Database
Parameters [See SAP DB Library]
Database Manager CLI: SAP DB 7.4, Section Configuring Database Instances [See SAP DB
Library]
Database Session
When you create a user, a password is assigned to it. In order to work with a database
instance [Page 132], users must enter a user name and password that the database system
recognizes.
When a user enters a correct user name and password, they are granted access to the
database instance. This opens a database session and automatically calls up the initial
transaction.
You can only work with the database instance within a database session. Users must end
each session explicitly.
User Manual: SAP DB 135