97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
// Copyright 2024 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 executor
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import (
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"context"
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"github.com/pingcap/tidb/pkg/domain"
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"github.com/pingcap/tidb/pkg/executor/internal/exec"
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"github.com/pingcap/tidb/pkg/meta/autoid"
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"github.com/pingcap/tidb/pkg/meta/model"
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"github.com/pingcap/tidb/pkg/parser/ast"
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"github.com/pingcap/tidb/pkg/util/chunk"
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)
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// ShowNextRowIDExec represents a show the next row ID executor.
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type ShowNextRowIDExec struct {
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exec.BaseExecutor
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tblName *ast.TableName
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done bool
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}
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var _ exec.Executor = &ShowNextRowIDExec{}
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// Next implements the Executor Next interface.
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func (e *ShowNextRowIDExec) Next(ctx context.Context, req *chunk.Chunk) error {
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req.Reset()
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if e.done {
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return nil
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}
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is := domain.GetDomain(e.Ctx()).InfoSchema()
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tbl, err := is.TableByName(ctx, e.tblName.Schema, e.tblName.Name)
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if err != nil {
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return err
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}
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tblMeta := tbl.Meta()
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allocators := tbl.Allocators(e.Ctx().GetTableCtx())
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for _, alloc := range allocators.Allocs {
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nextGlobalID, err := alloc.NextGlobalAutoID()
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if err != nil {
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return err
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}
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var colName, idType string
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switch alloc.GetType() {
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case autoid.RowIDAllocType:
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idType = "_TIDB_ROWID"
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if tblMeta.PKIsHandle {
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if col := tblMeta.GetAutoIncrementColInfo(); col != nil {
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colName = col.Name.O
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}
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} else {
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colName = model.ExtraHandleName.O
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}
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case autoid.AutoIncrementType:
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idType = "AUTO_INCREMENT"
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if tblMeta.PKIsHandle {
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if col := tblMeta.GetAutoIncrementColInfo(); col != nil {
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colName = col.Name.O
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}
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} else {
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colName = model.ExtraHandleName.O
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}
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case autoid.AutoRandomType:
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idType = "AUTO_RANDOM"
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colName = tblMeta.GetPkName().O
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case autoid.SequenceType:
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idType = "SEQUENCE"
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colName = ""
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default:
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return autoid.ErrInvalidAllocatorType.GenWithStackByArgs()
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}
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req.AppendString(0, e.tblName.Schema.O)
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req.AppendString(1, e.tblName.Name.O)
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req.AppendString(2, colName)
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req.AppendInt64(3, nextGlobalID)
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req.AppendString(4, idType)
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}
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e.done = true
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return nil
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}
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