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Extending HCL OneDB™Beyond standard relational database objects, HCL OneDB™ can be extended to handle specialized data types, access methods, routines, and other objects. HCL OneDB™ includes many built-in extensions that are fully integrated in the database server. HCL OneDB™ 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 HCL OneDB™.
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 HCL OneDB™ databases.
DataBlade® API Function ReferenceThe HCL OneDB™ DataBlade® API Function Reference describes the DataBlade® API functions and the subset of functions that the DataBlade® API supports.
Categories of DataBlade® API functionsThis section summarizes by categories the functions that the DataBlade® API provides. It divides functions that are valid within DataBlade® API modules into several functional categories and lists the functions within each category.
The DataBlade® API function libraryThis section lists the functions in the DataBlade® API function library by categories.
Memory managementThe DataBlade® API provides functions for managing memory.

Memory management

The DataBlade® API provides functions for managing memory.

Table 1. DataBlade API functions for memory management
Function category	DataBlade API function
Managing user memory	mi_alloc() mi_dalloc() mi_free()	mi_realloc() mi_switch_mem_duration() mi_zalloc()
Managing named memory	mi_lock_memory() mi_named_alloc() mi_named_free() mi_named_get()	mi_named_zalloc() mi_try_lock_memory() mi_unlock_memory()
Managing stack memory	mi_call()	mi_stack_limit()
Memory duration	mi_get_duration_size()	mi_get_memptr_duration()