Enum CategoricalArrayToArrowConverter 

pub enum CategoricalArrayToArrowConverter {
    Categorical {
        mapping: Arc<CategoricalMapping>,
        key_remap: CategoricalKeyRemap,
    },
    Enum {
        mapping: Arc<CategoricalMapping>,
        frozen: Arc<FrozenCategories>,
    },
}

Variants

Categorical

Fields

mapping: Arc<CategoricalMapping>

key_remap: CategoricalKeyRemap

Enum

Enum keys are not remapped, but we still track this variant to support the build_values_array() function.

Fields

mapping: Arc<CategoricalMapping>

frozen: Arc<FrozenCategories>

Implementations

impl CategoricalArrayToArrowConverter

pub fn build_values_array(&self, compat_level: CompatLevel) -> Box<dyn Array>

Build the values array of the dictionary:

• If Self is ::Categorical, this builds according to the current key_remap state:
  • If persist_remap is true, this state will hold all the keys this converter has encountered. It will otherwise hold only the keys seen from the last array_to_arrow() call.
• If Self is ::Enum, this returns the full set of values present in the Enum’s FrozenCategories.