// Copyright 2018 PingCAP, Inc. // // 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, // See the License for the specific language governing permissions and // limitations under the License. package property import ( "github.com/pingcap/tidb/expression" ) // LogicalProperty stands for logical properties such as schema of expression, // or statistics of columns in schema for output of Group. // All group expressions in a group share same logical property. type LogicalProperty struct { Stats *StatsInfo Schema *expression.Schema MaxOneRow bool }