89 lines
2.5 KiB
Go
89 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/parser/ast"
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"github.com/pingcap/tidb/pkg/parser/mysql"
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"github.com/pingcap/tidb/pkg/types"
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"github.com/pingcap/tidb/pkg/util/chunk"
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)
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// ShowSlowExec represents the executor of showing the slow queries.
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// It is build from the "admin show slow" statement:
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//
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// admin show slow top [internal | all] N
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// admin show slow recent N
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type ShowSlowExec struct {
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exec.BaseExecutor
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ShowSlow *ast.ShowSlow
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result []*domain.SlowQueryInfo
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cursor int
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}
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var _ exec.Executor = &ShowSlowExec{}
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// Open implements the Executor Open interface.
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func (e *ShowSlowExec) Open(ctx context.Context) error {
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if err := e.BaseExecutor.Open(ctx); err != nil {
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return err
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}
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dom := domain.GetDomain(e.Ctx())
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e.result = dom.ShowSlowQuery(e.ShowSlow)
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return nil
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}
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// Next implements the Executor Next interface.
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func (e *ShowSlowExec) Next(_ context.Context, req *chunk.Chunk) error {
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req.Reset()
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if e.cursor >= len(e.result) {
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return nil
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}
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for e.cursor < len(e.result) && req.NumRows() < e.MaxChunkSize() {
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slow := e.result[e.cursor]
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req.AppendString(0, slow.SQL)
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req.AppendTime(1, types.NewTime(types.FromGoTime(slow.Start), mysql.TypeTimestamp, types.MaxFsp))
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req.AppendDuration(2, types.Duration{Duration: slow.Duration, Fsp: types.MaxFsp})
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req.AppendString(3, slow.Detail.String())
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if slow.Succ {
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req.AppendInt64(4, 1)
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} else {
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req.AppendInt64(4, 0)
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}
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req.AppendUint64(5, slow.ConnID)
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req.AppendUint64(6, slow.TxnTS)
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req.AppendString(7, slow.User)
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req.AppendString(8, slow.DB)
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req.AppendString(9, slow.TableIDs)
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req.AppendString(10, slow.IndexNames)
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if slow.Internal {
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req.AppendInt64(11, 1)
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} else {
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req.AppendInt64(11, 0)
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}
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req.AppendString(12, slow.Digest)
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req.AppendString(13, slow.SessAlias)
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e.cursor++
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}
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return nil
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}
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