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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™.
HCL OneDB™ extensions and DataBlade® modulesThese topics describe how to use built-in database extensions and separately installed DataBlade® modules.
TimeSeries Data User's GuideThe HCL OneDB™ TimeSeries Data User's Guide contains information to assist you in using the TimeSeries extension with HCL OneDB™.
Time series API routinesThe time series application programming interface routines allow application programmers to directly access a time series datum.
Data structures for the time series APIThe time series API uses four data structures.
The ts_tsdesc structure

The ts_tsdesc structure

A ts_tsdesc structure contains a time series (ts_timeseries) and data structures for working with it. Among other things, ts_tsdesc tracks the current element and holds two element buffers for creating two elements.

Important: The two element buffers are shared by the element-fetching functions. An element that is fetched is overwritten two fetch calls later. Elements fetched by functions like ts_elem() should not be explicitly freed. They are freed when the ts_tsdesc is closed.

If you must look at more than two elements at a time, open a scan or use the ts_make_elem() or ts_make_elem_with_buf() routines to make a copy of one of your elements.

A ts_tsdesc structure is created by the ts_open() function and destroyed by the ts_close() procedure. It is used by most of the time series API routines.