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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
Create and drop XA data sources and data source typesThis section contains information about creating and dropping XA-compliant data source types and instances of XA-compliant data sources.
Drop an XA data source

Drop an XA data source

Use the DROP XADATASOURCE statement to drop an XA data source.

DROP XADATASOURCE datasourcename RESTRICT;

For example:

DROP XADATASOURCE informix.NewYork RESTRICT;

The XA data source must exist in the system because it was previously created with a CREATE XADATASOURCE TYPE statement. Information about the data source type is stored in the sysxasourcetypes system catalog table.

If an XA data source has been registered with a transaction that is not complete, the data source can be dropped only if the database is closed or the database session exits.

For syntax details, see the Informix® Guide to SQL: Syntax.

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