Struct TopKRow 

struct TopKRow {
    row: Vec<u8>,
    batch_id: u32,
    index: usize,
}

Represents one of the top K rows held in this heap. Orders according to memcmp of row (e.g. the arrow Row format, but could also be primitive values)

Reuses allocations to minimize runtime overhead of creating new Vecs

Fields

row: Vec<u8>

the value of the sort key for this row. This contains the bytes that could be stored in OwnedRow but uses Vec<u8> to reuse allocations.

batch_id: u32

the RecordBatch this row came from: an id into a RecordBatchStore

index: usize

the index in this record batch the row came from

Implementations

impl TopKRow

fn new(row: impl AsRef<[u8]>, batch_id: u32, index: usize) -> Self

Create a new TopKRow with new allocation

fn with_new_row( self, new_row: impl AsRef<[u8]>, batch_id: u32, index: usize, ) -> Self

Create a new TopKRow reusing the existing allocation

fn owned_size(&self) -> usize

Returns the number of bytes owned by this row in the heap (not including itself)

fn row(&self) -> &[u8]

Returns a slice to the owned row value

Trait Implementations

impl Debug for TopKRow

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

Formats the value using the given formatter.

impl Ord for TopKRow

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for TopKRow

fn eq(&self, other: &TopKRow) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for TopKRow

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for TopKRow

impl StructuralPartialEq for TopKRow