Struct ProjectionMask

pub struct ProjectionMask { /* private fields */ }

Specifies which column indices to project from an ORC type.

Implementations

impl ProjectionMask

pub fn all() -> Self

Project all columns.

pub fn roots( root_data_type: &RootDataType, indices: impl IntoIterator<Item = usize>, ) -> Self

Project only specific columns from the root type by column index.

pub fn named_roots<T>(root_data_type: &RootDataType, names: &[T]) -> Self

where T: AsRef<str>,

Project only specific columns from the root type by column name.

pub fn is_index_projected(&self, index: usize) -> bool

Check if ORC column should is projected or not, by index.

Trait Implementations

impl Clone for ProjectionMask

fn clone(&self) -> ProjectionMask

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ProjectionMask

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.