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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® API Programmer's GuideThe Informix® DataBlade® API Programmer's Guide describes information about the DataBlade® API, the C-language application programming interface (API) provided with HCL Informix®.
Database access
XA-compliant external data sources
Overview of integrating XA-compliant data sources in transactionsThe transaction manager, which is an integral part of the database server, not a separate module, can invoke support routines for each XA-compliant, external data source that participates in a distributed transaction at a particular transactional event, such as prepare, commit, or rollback. This interaction conforms to X/Open XA interface standards.
Files containing necessary componentsDataBlade® modules obtain the XA-defined return values, the XID structure definition, and other necessary information from the from the $INFORMIXDIR/incl/public/xa.h file.

Files containing necessary components

DataBlade® modules obtain the XA-defined return values, the XID structure definition, and other necessary information from the from the $INFORMIXDIR/incl/public/xa.h file.

The prototypes for mi_xa_register_xadatasource(), mi_xa_unregister_xadatasource(), mi_xa_get_xadatasource_rmid(), and mi_xa_get_current_xid() are in the $INFORMIXDIR/incl/public/milib.h file.

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