Method when

datafusion/expr/src/conditional_expressions.rs:48–57

(&mut self, when: Expr, then: Expr)

        }
    }
    pub fn when(&mut self, when: Expr, then: Expr) -> CaseBuilder {
        self.when_expr.push(when);
        self.then_expr.push(then);
        CaseBuilder {
            expr: self.expr.clone(),
            when_expr: self.when_expr.clone(),
            then_expr: self.then_expr.clone(),
            else_expr: self.else_expr.clone(),
        }
    }
    pub fn otherwise(&mut self, else_expr: Expr) -> Result<Expr> {
        self.else_expr = Some(Box::new(else_expr));
        self.build()