Create an Opaque Data Type

This section describes how to design and write an opaque data type.

To create an opaque data type:

  1. Design the opaque data type, including its external and internal representations.
  2. Write the opaque-type support functions.
  3. Take special measures if the opaque type is for multirepresentational data.
Tip: The HCL Informix® BladeSmith development tool, which is part of the Informix DataBlade Developers Kit (DBDK), automatically generates C source code for the support routines of an opaque type and the SQL statements to register the opaque type. For more information, see the IBM® Informix DataBlade Developers Kit User's Guide.
Parent topic: Extend data types
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