Struct DenseRankState 

pub struct DenseRankState {
    pub prev_order_key: Option<Vec<u8>>,
    pub prev_rank: i64,
}

State for the dense_rank window function.

Fields

prev_order_key: Option<Vec<u8>>

The memcmp-encoded order key of the previous output row. Absent when no row has been output yet.

prev_rank: i64

Implementations

impl DenseRankState

pub fn prev_order_key(&self) -> &[u8]

Returns the value of prev_order_key, or the default value if prev_order_key is unset.

impl DenseRankState

pub fn get_prev_order_key(&self) -> Result<&Vec<u8>, PbFieldNotFound>

pub fn get_prev_rank(&self) -> i64

Trait Implementations

impl Clone for DenseRankState

fn clone(&self) -> DenseRankState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DenseRankState

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

Formats the value using the given formatter.

impl Default for DenseRankState

fn default() -> Self

Returns the “default value” for a type.

impl Hash for DenseRankState

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for DenseRankState

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for DenseRankState

fn eq(&self, other: &DenseRankState) -> 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 Eq for DenseRankState

impl StructuralPartialEq for DenseRankState