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Designing databasesThe first step in creating a relational database is to construct a data model, which is a precise, complete definition of the data you want to store. After you prepare your data model, you must implement it as a database and tables. To implement your data model, you first select a data type for each column and then you create a database and tables and populate the tables with data. You can also implement fragmentation strategies and control access to your data.
Designing and Implementing a DatabaseThe HCL OneDB™ Database Design and Implementation Guide provides information to help you design, implement, and manage your HCL® OneDB® databases. It includes data models that illustrate different approaches to database design and shows you how to use structured query language (SQL) to implement and manage your databases.
Managing databases
Grant and limit access to your database
Grant privileges
Automate privileges
Roles
Enable default roles and non-default roles

Enable default roles and non-default roles

After the DBA grants privileges and adds users to a role, there are two possible ways to enable roles.

The DBSA can specify a default role for PUBLIC or for individual users by using the GRANT DEFAULT ROLE statement. This role is automatically activated as the initial role setting when the user connects to the database.
Any role that a user holds can also be activated when the user specifies that role in the SET ROLE statement.

When a role is enabled, all privileges that have been granted to the role become available, and all privileges explicitly granted to you or to PUBLIC.

Assigning privileges to a role, and then granting that role as the default role to specified users is convenient for sessions in which those users run an application that requires a specific set of access privileges. Use default roles when it is impractical to recompile an application to include GRANT and SET ROLE statements that specifically assign to users the necessary access privileges.

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