Struct LookupNode

pub struct LookupNode {
    pub arrange_key: Vec<i32>,
    pub stream_key: Vec<i32>,
    pub use_current_epoch: bool,
    pub column_mapping: Vec<i32>,
    pub arrangement_table_info: Option<ArrangementInfo>,
    pub arrangement_table_id: Option<ArrangementTableId>,
}

Special node for shared state. LookupNode will join an arrangement with a stream.

Fields

arrange_key: Vec<i32>

Join key of the arrangement side

stream_key: Vec<i32>

Join key of the stream side

use_current_epoch: bool

Whether to join the current epoch of arrangement

column_mapping: Vec<i32>

Sometimes we need to re-order the output data to meet the requirement of schema. By default, lookup executor will produce <arrangement side, stream side>. We will then apply the column mapping to the combined result.

arrangement_table_info: Option<ArrangementInfo>

Info about the arrangement

arrangement_table_id: Option<ArrangementTableId>

Implementations

impl LookupNode

pub fn get_arrange_key(&self) -> &Vec<i32>

pub fn get_stream_key(&self) -> &Vec<i32>

pub fn get_use_current_epoch(&self) -> bool

pub fn get_column_mapping(&self) -> &Vec<i32>

pub fn get_arrangement_table_info( &self, ) -> Result<&ArrangementInfo, PbFieldNotFound>

pub fn get_arrangement_table_id( &self, ) -> Result<&ArrangementTableId, PbFieldNotFound>

Trait Implementations

impl Clone for LookupNode

fn clone(&self) -> LookupNode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LookupNode

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

Formats the value using the given formatter.

impl Default for LookupNode

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for LookupNode

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

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Message for LookupNode

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 LookupNode

fn eq(&self, other: &LookupNode) -> 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 LookupNode

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 LookupNode