Struct prql_compiler::ir::pl::Lineage

pub struct Lineage {
    pub columns: Vec<LineageColumn>,
    pub inputs: Vec<LineageInput>,
    pub prev_columns: Vec<LineageColumn>,
}

Represents the object that is manipulated by the pipeline transforms. Similar to a view in a database or a data frame.

Fields

columns: Vec<LineageColumn>

inputs: Vec<LineageInput>

prev_columns: Vec<LineageColumn>

Implementations

impl Lineage

pub fn clear(&mut self)

pub fn apply_assigns(&mut self, assigns: &Expr, inline_refs: bool)

pub fn apply_assign(&mut self, expr: &Expr, inline_refs: bool)

pub fn find_input_by_name(&self, input_name: &str) -> Option<&LineageInput>

pub fn find_input(&self, input_id: usize) -> Option<&LineageInput>

pub fn rename(&mut self, alias: String)

Renames all frame inputs to the given alias.

Trait Implementations

impl Clone for Lineage

fn clone(&self) -> Lineage

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Lineage

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

Formats the value using the given formatter.

impl Default for Lineage

fn default() -> Lineage

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Lineage

fn deserialize<__D>( __deserializer: __D ) -> Result<Lineage, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Lineage

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

Formats the value using the given formatter.

impl PartialEq for Lineage

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for Lineage

fn serialize<__S>( &self, __serializer: __S ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Lineage

impl StructuralPartialEq for Lineage