Function SetNullCount

cpp/src/arrow/array/data.h:358–358

\brief Set the cached physical null count \param v the number of nulls in the ArrayData This should only be used when initially populating the ArrayData, if it possible to compute the null count without visiting the entire validity bitmap. In most cases, relying on `GetNullCount` is sufficient.

  /// it possible to compute the null count without visiting the entire validity
  /// bitmap. In most cases, relying on `GetNullCount` is sufficient.
  void SetNullCount(int64_t v) { null_count.store(v); }

  /// \brief Return the physical null count
  ///