Struct ProjectNode

pub struct ProjectNode {
    pub select_list: Vec<ExprNode>,
    pub watermark_input_cols: Vec<u32>,
    pub watermark_output_cols: Vec<u32>,
    pub nondecreasing_exprs: Vec<u32>,
    pub noop_update_hint: bool,
}

Fields

select_list: Vec<ExprNode>

watermark_input_cols: Vec<u32>

this two field is expressing a list of usize pair, which means when project receives a watermark with watermark_input_cols\[i\] column index, it should derive a new watermark with watermark_output_cols\[i\]th expression

watermark_output_cols: Vec<u32>

nondecreasing_exprs: Vec<u32>

noop_update_hint: bool

Whether there are likely no-op updates in the output chunks, so that eliminating them with StreamChunk::eliminate_adjacent_noop_update could be beneficial.

Implementations

impl ProjectNode

pub fn get_select_list(&self) -> &Vec<ExprNode>

pub fn get_watermark_input_cols(&self) -> &Vec<u32>

pub fn get_watermark_output_cols(&self) -> &Vec<u32>

pub fn get_nondecreasing_exprs(&self) -> &Vec<u32>

pub fn get_noop_update_hint(&self) -> bool

Trait Implementations

impl Clone for ProjectNode

fn clone(&self) -> ProjectNode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ProjectNode

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

Formats the value using the given formatter.

impl Default for ProjectNode

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ProjectNode

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Message for ProjectNode

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 ProjectNode

fn eq(&self, other: &ProjectNode) -> 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 Serialize for ProjectNode

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ProjectNode