Struct polars_lazy::frame::JoinBuilder

pub struct JoinBuilder { /* fields omitted */ }

This is supported on crate feature compile only.

Implementations

impl JoinBuilder

pub fn with(self, other: LazyFrame) -> Self

The table to join with.

pub fn how(self, how: JoinType) -> Self

Select the join type.

pub fn left_on(self, on: Vec<Expr>) -> Self

The columns you want to join the left table on.

pub fn right_on(self, on: Vec<Expr>) -> Self

The columns you want to join the right table on.

pub fn allow_parallel(self, allow: bool) -> Self

Allow parallel table evaluation.

pub fn force_parallel(self, allow: bool) -> Self

Force parallel table evaluation.

pub fn suffix(self, suffix: String) -> Self

Suffix to add duplicate column names in join. Defaults to "_right".

pub fn asof_by(self, left_by: Vec<String>, right_by: Vec<String>) -> Self

Set the by subgrouper of an asof join.

pub fn finish(self) -> LazyFrame

Finish builder