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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 extensions
You 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 Guide
The
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
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®.
Informix®
extensions and
DataBlade®
modules
These topics describe how to use built-in database extensions and separately installed
DataBlade®
modules.
Creating extensions
You 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 Guide
The
Informix® DataBlade® API Programmer's Guide
describes information about the
DataBlade® API
, the C-language application programming interface (API) provided with
HCL Informix®
.
DataBlade® API
overview
Data manipulation
Database access
Connection handling
This section describes how to initialize, establish, and close connections.
Execute SQL statements
One basic task of a
DataBlade® API
module is to send SQL statements to the database server for execution.
Execute user-defined routines
This section provides information about how to call a user-defined routine (UDR).
Exceptions and events
This section describes exceptions and events, and explains how to handle them in
DataBlade® API
modules.
XA-compliant external data sources
Overview of integrating XA-compliant data sources in transactions
The 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.
Create user-defined XA-support routines
You can create user-defined XA-support routines, such as
xa_open()
,
xa_start()
,
xa_prepare()
,
xa_rollback()
,
xa_commit()
,
xa_recover()
,
xa_complete()
,
xa_forget()
,
xa_close()
, and
xa_end()
. These purpose functions are used for transaction management.
Create and drop XA data sources and data source types
This section contains information about creating and dropping XA-compliant data source types and instances of XA-compliant data sources.
Register and unregister XA-compliant data sources
After you create an external XA-compliant data source, transactions can register data source using the
mi_xa_register_xadatasource()
or
ax_reg()
functions. You can also unregister the data source using the
mi_xa_unregister_xadatasource()
or
ax_unreg()
functions.
Monitor integrated transactions
Create user-defined routines
Appendix
This section contains additional reference information.
DataBlade® API
Function Reference
The
Informix® DataBlade® API Function Reference
describes the
DataBlade® API
functions and the subset of
Informix® ESQL/C
functions that the
DataBlade® API
supports.
DataBlade®
Developers Kit
The
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.
J/Foundation Developer's Guide
The
J/Foundation Developer's Guide
describes how to write user-defined routines (UDRs) in the Java™ programming language for
Informix®
.
R-Tree Index User's Guide
The
Informix® R-Tree Index User's Guide
describes the
HCL Informix®
R-tree secondary access method and how to access and use its components.
User-Defined Routines and Data Types Developer's Guide
The
Informix® User-Defined Routines and Data Types Developer's Guide
describes how to define new data types and enable user-defined routines (UDRs) to extend
HCL Informix®
.
Virtual-Table Interface Guide
The
Informix® Virtual-Table Interface Programmer's Guide
explains how to create a primary access method with the Virtual-Table Interface (VTI) so that users have a single SQL interface to
HCL Informix®
tables and to data that does not conform to the storage scheme of
HCL Informix®
.
Virtual-Index Interface Guide
The
Informix® Virtual-Index Interface Programmer's Guide
explains how to create a secondary access method with the Virtual-Index Interface (VII) to extend the built-in indexing schemes of
HCL Informix®
typically with a
DataBlade®
module.
XA-compliant external data sources
Overview of integrating XA-compliant data sources in transactions
The 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.
Create user-defined XA-support routines
You can create user-defined XA-support routines, such as
xa_open()
,
xa_start()
,
xa_prepare()
,
xa_rollback()
,
xa_commit()
,
xa_recover()
,
xa_complete()
,
xa_forget()
,
xa_close()
, and
xa_end()
. These purpose functions are used for transaction management.
Create and drop XA data sources and data source types
This section contains information about creating and dropping XA-compliant data source types and instances of XA-compliant data sources.
Register and unregister XA-compliant data sources
After you create an external XA-compliant data source, transactions can register data source using the
mi_xa_register_xadatasource()
or
ax_reg()
functions. You can also unregister the data source using the
mi_xa_unregister_xadatasource()
or
ax_unreg()
functions.
Monitor integrated transactions
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