pub fn merge_dictionary_values<K: ArrowDictionaryKeyType>(
dictionaries: &[&DictionaryArray<K>],
masks: Option<&[BooleanBuffer]>,
) -> Result<MergedDictionaries<K>, ArrowError>Expand description
Given an array of dictionaries and an optional key mask compute a values array
containing referenced values, along with mappings from the [DictionaryArray]
keys to the new keys within this values array. Best-effort will be made to ensure
that the dictionary values are unique
This method is meant to be very fast and the output dictionary values
may not be unique, unlike GenericByteDictionaryBuilder which is slower
but produces unique values