109 lines
2.7 KiB
Go
109 lines
2.7 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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"encoding/json"
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"fmt"
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"strings"
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"github.com/pingcap/errors"
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"github.com/pingcap/tidb/pkg/executor/internal/exec"
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"github.com/pingcap/tidb/pkg/parser/ast"
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"github.com/pingcap/tidb/pkg/planner/indexadvisor"
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"github.com/pingcap/tidb/pkg/util/chunk"
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)
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// RecommendIndexExec represents a recommend index executor.
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type RecommendIndexExec struct {
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exec.BaseExecutor
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Action string
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SQL string
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AdviseID int64
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Options []ast.RecommendIndexOption
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done bool
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}
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var _ exec.Executor = &RecommendIndexExec{}
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// Next implements the Executor Next interface.
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func (e *RecommendIndexExec) 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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e.done = true
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if e.Action == "set" {
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return indexadvisor.SetOptions(e.Ctx(), e.Options...)
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}
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if e.Action == "show" {
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return e.showOptions(req)
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}
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if e.Action != "run" {
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return fmt.Errorf("unsupported action: %s", e.Action)
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}
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var sqls []string
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if e.SQL != "" {
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tmp := strings.Split(e.SQL, ";")
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for _, s := range tmp {
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s = strings.TrimSpace(s)
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if s != "" {
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sqls = append(sqls, s)
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}
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}
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if len(sqls) == 0 {
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return errors.New("empty SQLs")
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}
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}
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results, err := indexadvisor.AdviseIndexes(ctx, e.Ctx(), sqls, e.Options)
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for _, r := range results {
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req.AppendString(0, r.Database)
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req.AppendString(1, r.Table)
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req.AppendString(2, r.IndexName)
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req.AppendString(3, strings.Join(r.IndexColumns, ","))
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req.AppendString(4, fmt.Sprintf("%v", r.IndexDetail.IndexSize))
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req.AppendString(5, r.IndexDetail.Reason)
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jData, err := json.Marshal(r.TopImpactedQueries)
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if err != nil {
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return err
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}
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req.AppendString(6, string(jData))
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req.AppendString(7, fmt.Sprintf("CREATE INDEX %s ON %s(%s);",
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r.IndexName, r.Table, strings.Join(r.IndexColumns, ",")))
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}
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return err
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}
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func (e *RecommendIndexExec) showOptions(req *chunk.Chunk) error {
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vals, desc, err := indexadvisor.GetOptions(e.Ctx(), indexadvisor.AllOptions...)
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if err != nil {
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return err
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}
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for _, opt := range indexadvisor.AllOptions {
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if v, ok := vals[opt]; ok {
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req.AppendString(0, opt)
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req.AppendString(1, v)
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req.AppendString(2, desc[opt])
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}
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}
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return nil
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}
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