Method filter

datafusion/expr/src/logical_plan/builder.rs:624–629

Apply a filter

(self, expr: impl Into<Expr>)

    /// Apply a filter
    pub fn filter(self, expr: impl Into<Expr>) -> Result<Self> {
        let expr = normalize_col(expr.into(), &self.plan)?;
        Filter::try_new(expr, self.plan)
            .map(LogicalPlan::Filter)
            .map(Self::new)
    }

    /// Apply a filter which is used for a having clause
    pub fn having(self, expr: impl Into<Expr>) -> Result<Self> {