Struct polars_lazy::frame::JoinBuilder

pub struct JoinBuilder { /* private fields */ }

Implementations

impl JoinBuilder

pub fn new(lf: LazyFrame) -> Self

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 on<E: AsRef<[Expr]>>(self, on: E) -> Self

The columns you want to join both tables on.

pub fn left_on<E: AsRef<[Expr]>>(self, on: E) -> Self

The columns you want to join the left table on.

pub fn right_on<E: AsRef<[Expr]>>(self, on: E) -> 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<S: AsRef<str>>(self, suffix: S) -> Self

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

pub fn finish(self) -> LazyFrame

Finish builder