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Designing databases
The 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 Database
The Informix® Database Design and Implementation Guide provides information to help you design, implement, and manage your Informix 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
Language-level privileges
External routines

Designing databases
The 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 Database
  The Informix® Database Design and Implementation Guide provides information to help you design, implement, and manage your Informix 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.

External routines

This release of does not support language-level privileges on external routines that are written in the C or Java™ language. When the IFX_EXTEND_ROLE configuration parameter to ON, however, equivalent functionality is provided through the built-in EXTEND role, which is required for any user to register, drop, or replace a UDR or a DataBlade® module that is written in the C or Java™ language.

Only the database server administrator (DBSA), by default user informix, can grant the EXTEND role. In contrast with user-defined role names, built-in roles such as EXTEND and DBSECADM are automatically active, and the privileges conferred by the role cannot be modified. When the EXTEND role is enabled, only users who have been granted the EXTEND role can create or drop a DataBlade® module or an external UDR.

The DBSA also has the option of disabling this restriction by setting the IFX_EXTEND_ROLE configuration parameter to OFF, or to leave it unset. In this case, any user who holds the RESOURCE privilege on the database can create a UDR written in the C or Java™ language.