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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.
Object-relational databases
Create and use extended data types in HCL OneDB™
HCL OneDB™ data types
Extended data types
Opaque data types

Opaque data types

An opaque data type is an encapsulated data type that you create with the CREATE OPAQUE TYPE statement. When you create an opaque data type, you must explicitly define the structure of the data type and the functions, operators, and aggregates that operate on the opaque data type. You can use an opaque data type to define columns and program variables in the same way that you use built-in types.

For information about creating opaque data types, see HCL OneDB™ User-Defined Routines and Data Types Developer's Guide and the HCL OneDB Guide to SQL: Syntax.

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