Method count_expr

datafusion/core/tests/physical_optimizer/test_utils.rs:663–669

Return appropriate expr depending if COUNT is for col or table (*)

(&self, schema: &Schema)

    /// Return appropriate expr depending if COUNT is for col or table (*)
    pub fn count_expr(&self, schema: &Schema) -> AggregateFunctionExpr {
        AggregateExprBuilder::new(count_udaf(), vec![self.column()])
            .schema(Arc::new(schema.clone()))
            .alias(self.column_name())
            .build()
            .unwrap()
    }

    /// what argument would this aggregate need in the plan?
    fn column(&self) -> Arc<dyn PhysicalExpr> {