Function duckdb_pending_execution_is_finished 

pub unsafe extern "C" fn duckdb_pending_execution_is_finished(
    pending_state: duckdb_pending_state,
) -> bool

Returns whether a duckdb_pending_state is finished executing. For example if pending_state is DUCKDB_PENDING_RESULT_READY, this function will return true.

@param pending_state The pending state on which to decide whether to finish execution. @return Boolean indicating pending execution should be considered finished.