51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
// Copyright 2022 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ddl
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type tblIdxID struct {
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physicalID int64
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indexID int64
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}
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type elementIDAlloc struct {
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physicalIDs map[int64]int64
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indexIDs map[tblIdxID]int64
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}
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func (e *elementIDAlloc) allocForIndexID(physicalID, indexID int64) int64 {
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if e.indexIDs == nil {
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e.indexIDs = make(map[tblIdxID]int64)
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}
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k := tblIdxID{physicalID: physicalID, indexID: indexID}
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if id, found := e.indexIDs[k]; found {
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return id
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}
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next := int64(len(e.physicalIDs) + len(e.indexIDs) + 1)
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e.indexIDs[k] = next
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return next
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}
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func (e *elementIDAlloc) allocForPhysicalID(tableID int64) int64 {
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if e.physicalIDs == nil {
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e.physicalIDs = make(map[int64]int64)
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}
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if id, found := e.physicalIDs[tableID]; found {
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return id
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}
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next := int64(len(e.physicalIDs) + len(e.indexIDs) + 1)
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e.physicalIDs[tableID] = next
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return next
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}
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