pola-rs/polars · error

'with' not set in join builder

Error message

'with' not set in join builder

What it means

Error "'with' not set in join builder" thrown in pola-rs/polars.

Source

Thrown at crates/polars-lazy/src/frame/mod.rs:2284

        self
    }

    /// Whether to preserve the row order.
    pub fn maintain_order(mut self, maintain_order: MaintainOrderJoin) -> Self {
        self.maintain_order = maintain_order;
        self
    }

    /// Whether to prefer a specific build side.
    pub fn build_side(mut self, build_side: Option<JoinBuildSide>) -> Self {
        self.build_side = build_side;
        self
    }

    /// Finish builder
    pub fn finish(self) -> LazyFrame {
        let opt_state = self.lf.opt_state;
        let other = self.other.expect("'with' not set in join builder");

        let args = JoinArgs {
            how: self.how,
            validation: self.validation,
            suffix: self.suffix,
            slice: None,
            nulls_equal: self.nulls_equal,
            coalesce: self.coalesce,
            maintain_order: self.maintain_order,
            build_side: self.build_side,
        };

        let lp = self
            .lf
            .get_plan_builder()
            .join(
                other.logical_plan,
                self.left_on,

View on GitHub (pinned to df599052da)

When it happens

Trigger: Thrown at crates/polars-lazy/src/frame/mod.rs:2284 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of pola-rs/polars@df599052da (2026-08-16). Data as JSON: /api/errors/6710a81d9a599652. Report an issue: GitHub.