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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.
Process statement results
Execute the mi_get_result() loop
Handling no more results statusThe mi_get_result() function returns a status of MI_NO_MORE_RESULTS to indicate that statement processing for the current statement is complete.

Handling no more results status

The mi_get_result() function returns a status of MI_NO_MORE_RESULTS to indicate that statement processing for the current statement is complete.

The function can return MI_NO_MORE_RESULTS when any of the following conditions occur for the current statement:

When the cursor is empty after mi_open_prepared_statement() has opened the cursor and before mi_fetch_statement() has fetched rows into this cursor.
After mi_next_row() has retrieved the last row from the cursor.
When the query is complete, after mi_query_finish() or mi_query_interrupt() has executed.
When any non-query statement is complete: after mi_get_result() has returned the MI_DML or MI_DDL statement status.

Tip: When a SELECT or FETCH statement encounters NOT FOUND (or END OF DATA), the database server sets SQLSTATE to "02000" (class = "02"). However, the NOT FOUND condition does not generate a database server exception.

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