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Extending Informix®Beyond standard relational database objects, HCL Informix® can be extended to handle specialized data types, access methods, routines, and other objects. Informix® includes many built-in extensions that are fully integrated in the database server. Informix® also provides DataBlade® modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for Informix®.
Creating extensionsYou can create user-defined data types, routines, access methods, and other database objects to suit your needs. You can use application programming interfaces to write user-defined routines and applications that access data in Informix® databases.
DataBlade® Developers KitThe DataBlade® Developers Kit (DBDK) guides contain information about the tools you can use to develop and package DataBlade® modules, which extend the functionality of HCL Informix® databases.
DataBlade® Developers Kit User's GuideThe HCL Informix® DataBlade® Developers Kit User's Guide describes how to use tools to develop and package DataBlade® modules.
Design DataBlade® modulesThis section describes the DataBlade® module SQL design issues.
Query processingTo develop a DataBlade® module, you need a general understanding of query processing and HCL Informix® SQL. You must also understand the execution environment inside your Informix® database server ̵ the multithreading model, the collection of processes in which DataBlade® module routines can execute, and concurrent access to database objects, transactions, and so on.

Query processing

To develop a DataBlade® module, you need a general understanding of query processing and HCL Informix® SQL. You must also understand the execution environment inside your Informix database server ̵ the multithreading model, the collection of processes in which DataBlade module routines can execute, and concurrent access to database objects, transactions, and so on.

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