Trait CursorValues 

pub trait CursorValues {
    // Required methods
    fn len(&self) -> usize;
    fn eq(l: &Self, l_idx: usize, r: &Self, r_idx: usize) -> bool;
    fn eq_to_previous(cursor: &Self, idx: usize) -> bool;
    fn compare(l: &Self, l_idx: usize, r: &Self, r_idx: usize) -> Ordering;
}

A comparable collection of values for use with Cursor

This is a trait as there are several specialized implementations, such as for single columns or for normalized multi column keys ([Rows])

Required Methods

fn len(&self) -> usize

fn eq(l: &Self, l_idx: usize, r: &Self, r_idx: usize) -> bool

Returns true if l[l_idx] == r[r_idx]

fn eq_to_previous(cursor: &Self, idx: usize) -> bool

Returns true if row[idx] == row[idx - 1] Given idx should be greater than 0

fn compare(l: &Self, l_idx: usize, r: &Self, r_idx: usize) -> Ordering

Returns comparison of l[l_idx] and r[r_idx]

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl CursorValues for StringViewArray

fn len(&self) -> usize

fn eq(l: &Self, l_idx: usize, r: &Self, r_idx: usize) -> bool

fn eq_to_previous(cursor: &Self, idx: usize) -> bool

fn compare(l: &Self, l_idx: usize, r: &Self, r_idx: usize) -> Ordering

Implementors

impl CursorValues for RowValues

impl<T: CursorValues> CursorValues for ArrayValues<T>

impl<T: ArrowNativeTypeOp> CursorValues for PrimitiveValues<T>

impl<T: OffsetSizeTrait> CursorValues for ByteArrayValues<T>