// Copyright 2019 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 types import ( "strings" "github.com/pingcap/parser/model" ) // FieldName records the names used for mysql protocol. type FieldName struct { OrigTblName model.CIStr OrigColName model.CIStr DBName model.CIStr TblName model.CIStr ColName model.CIStr Hidden bool } const emptyName = "EMPTY_NAME" // String implements Stringer interface. func (name *FieldName) String() string { builder := strings.Builder{} if name.Hidden { return emptyName } if name.DBName.L != "" { builder.WriteString(name.DBName.L + ".") } if name.TblName.L != "" { builder.WriteString(name.TblName.L + ".") } builder.WriteString(name.ColName.L) return builder.String() } // NameSlice is the slice of the *fieldName type NameSlice []*FieldName // Shallow is a shallow copy, only making a new slice. func (s NameSlice) Shallow() NameSlice { ret := make(NameSlice, len(s)) copy(ret, s) return ret } // EmptyName is to occupy the position in the name slice. If it's set, that column's name is hidden. var EmptyName = &FieldName{Hidden: true}