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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 statementsTo execute an SQL statement, a DataBlade® API module must send the SQL statement to the database server, where the statement is executed.
Execute basic SQL statementsThe mi_exec() function provides the simplest way to send a basic SQL statement to the database server for execution. A basic SQL statement is one that does not need to be prepared. That is, the statement does not execute many times in the DataBlade® API module or it does not contain input parameters.

Execute basic SQL statements

The mi_exec() function provides the simplest way to send a basic SQL statement to the database server for execution. A basic SQL statement is one that does not need to be prepared. That is, the statement does not execute many times in the DataBlade® API module or it does not contain input parameters.

To send a basic SQL statement to the database server for execution, take the following steps:

Assemble a statement string, which contains the SQL statement to execute.
Send the statement string to the database server with mi_exec().

The database server parses the statement string, optimizes it, executes it, and sends back the statement results.

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