Custom Execution Plan#
Here is an example in C++ of creating a custom execution plan with a hard-coded engine and knobs. Refer to the coresponding C++ sample in samples/cpp/misc/custom_plan.cpp.
Get the Engine Count#
inline error_t
get_engine_count(int64_t &count);
Parameters#
count: number of engines [out parameter]
Return Value#
An
error_tobject indicating the success or failure of the function.
Get the Knobs Supported by an Engine#
inline error_t
get_knobs_for_engine(int64_t const engine, std::vector<Knob> &);
Parameters#
engine: engine indexknobs: list of knobs [out parameter]
Return Value#
An
error_tobject indicating the success or failure of the function.
Create Plan with a Particular Engine and Knobs#
error_t
create_execution_plan(int64_t const engine_id, std::unordered_map<KnobType_t, int64_t> const &knobs);
Parameters#
engine_id: engine indexknobs: knobs
Return Value#
An
error_tobject indicating the success or failure of the function.