// Copyright 2021 EMQ Technologies Co., Ltd. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package planner import "github.com/lf-edge/ekuiper/pkg/ast" type OrderPlan struct { baseLogicalPlan SortFields ast.SortFields } func (p OrderPlan) Init() *OrderPlan { p.baseLogicalPlan.self = &p return &p } func (p *OrderPlan) PruneColumns(fields []ast.Expr) error { f := getFields(p.SortFields) return p.baseLogicalPlan.PruneColumns(append(fields, f...)) }