github.com/whtcorpsinc/MilevaDB-Prod@v0.0.0-20211104133533-f57f4be3b597/causetstore/petri/acyclic/causet/property/logical_property.go (about)

     1  // Copyright 2020 WHTCORPS INC, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package property
    15  
    16  import (
    17  	"github.com/whtcorpsinc/milevadb/memex"
    18  )
    19  
    20  // LogicalProperty stands for logical properties such as schemaReplicant of memex,
    21  // or statistics of columns in schemaReplicant for output of Group.
    22  // All group memexs in a group share same logical property.
    23  type LogicalProperty struct {
    24  	Stats     *StatsInfo
    25  	Schema    *memex.Schema
    26  	MaxOneRow bool
    27  }