Enum HashKeys

pub enum HashKeys {
    RowEncoded(RowEncodedKeys),
    Single(SingleKeys),
}

Represents a DataFrame plus a hash per row, intended for keys in grouping or joining. The hashes may or may not actually be physically pre-computed, this depends per type.

Variants

RowEncoded(RowEncodedKeys)

Single(SingleKeys)

Implementations

impl HashKeys

pub fn from_df( df: &DataFrame, random_state: PlRandomState, null_is_valid: bool, force_row_encoding: bool, ) -> Self

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn gen_partition_idxs( &self, partitioner: &HashPartitioner, partition_idxs: &mut [Vec<IdxSize>], sketches: &mut [CardinalitySketch], partition_nulls: bool, )

After this call partition_idxs[p] will contain the indices of hashes that belong to partition p, and the cardinality sketches are updated accordingly.

pub fn gen_partitioned_gather_idxs( &self, partitioner: &HashPartitioner, gathers_per_key: &[IdxSize], gather_idxs: &mut Vec<ChunkId<32>>, )

Generates indices for a chunked gather such that the ith key gathers the next gathers_per_key[i] elements from the partition[i]th chunk.

pub unsafe fn gather(&self, idxs: &[IdxSize]) -> Self

Safety

The indices must be in-bounds.

Trait Implementations

impl Clone for HashKeys

fn clone(&self) -> HashKeys

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for HashKeys

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

Formats the value using the given formatter.