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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
Execute SQL statementsOne basic task of a DataBlade® API module is to send SQL statements to the database server for execution.

Execute SQL statements

One basic task of a DataBlade® API module is to send SQL statements to the database server for execution.

To execute an SQL statement, a DataBlade API module must perform the following tasks:

Assemble the SQL statement and send it to the database server for execution.
Process results that the database server returns to the module.
If the SQL statement (such as a SELECT) returns rows, obtain each row of data.
For each row, obtain the column value or values of interest.
Complete the execution of the statement.

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