Struct UnionArrowToVariantBuilder 

pub(crate) struct UnionArrowToVariantBuilder<'a> {
    union_array: &'a UnionArray,
    child_builders: HashMap<i8, Box<ArrowToVariantRowBuilder<'a>>>,
}

Union builder for both sparse and dense union arrays

NOTE: Union type ids are not required to be dense, hence the hash map for child builders.

Fields

union_array: &'a UnionArray

child_builders: HashMap<i8, Box<ArrowToVariantRowBuilder<'a>>>

Implementations

impl<'a> UnionArrowToVariantBuilder<'a>

pub(crate) fn new( array: &'a dyn Array, options: &'a CastOptions, ) -> Result<Self, ArrowError>

fn append_row( &mut self, builder: &mut impl VariantBuilderExt, index: usize, ) -> Result<(), ArrowError>