Advanced features (Server)

The DataBlade API provides a set of advanced features to handle specialized needs of a UDR or DataBlade module that the regular public features cannot handle.

The following table lists the advanced DataBlade API features.

Table 1. Advanced features of the DataBlade API
Advanced feature	Description	More information
Named memory	Enables a UDR to obtain a memory address through a name assigned to the memory block	Manage named memory
Memory durations	Provides a UDR with memory durations that exceed its lifetime	Advanced memory durations
Session-duration connection descriptor	Enables a UDR to cache connection information for the length of a session	Obtain a session-duration connection descriptor
Session-duration function descriptor	Enables a UDR to cache function descriptors in named memory so that many UDRs can execute the same UDR through Fastpath	Reuse a function descriptor
Controlling the VP environment	Enables a UDR to obtain dynamically information about the VP and VP class in which it executes and to make some changes to this environment	Control the VP environment
Setting the row and column identifier in the MI_FPARAM structure of a UDR	Enables a UDR to change the row associated with a UDR	Descriptions of mi_fp_setcolid() and mi_fp_setrow() in the IBM® Informix® DataBlade API Function Reference
Obtaining the current MI_FPARAM address	Enables a UDR to obtain dynamically the address of its own MI_FPARAM structure	Description of mi_fparam_get_current() in the IBM Informix DataBlade API Function Reference
Microseconds component of last-modification time for a smart large object	Enables UDRs to maintain the microseconds component of last-modification time, which the database server does not maintain	Description of mi_lo_utimes() in the IBM Informix DataBlade API Function Reference

Important: These DataBlade API features can adversely affect your UDR if you use them incorrectly. Use them only when the public DataBlade API features cannot perform the tasks you need done.