Method nullable

datafusion/expr/src/simplify.rs:121–123

Returns true if expr is nullable

(&self, expr: &Expr)

    /// Returns true if expr is nullable
    pub fn nullable(&self, expr: &Expr) -> Result<bool> {
        expr.nullable(self.schema.as_ref())
    }

    /// Returns data type of this expr needed for determining optimized int type of a value
    pub fn get_data_type(&self, expr: &Expr) -> Result<DataType> {