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stmtctx_test.go
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stmtctx_test.go
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// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package stmtctx_test
import (
"context"
"encoding/json"
"fmt"
"math/rand"
"reflect"
"sort"
"testing"
"time"
"github.com/pingcap/errors"
"github.com/pingcap/tidb/pkg/errctx"
"github.com/pingcap/tidb/pkg/kv"
"github.com/pingcap/tidb/pkg/sessionctx/stmtctx"
"github.com/pingcap/tidb/pkg/sessionctx/variable"
"github.com/pingcap/tidb/pkg/testkit"
"github.com/pingcap/tidb/pkg/types"
contextutil "github.com/pingcap/tidb/pkg/util/context"
"github.com/pingcap/tidb/pkg/util/execdetails"
"github.com/pingcap/tidb/pkg/util/hint"
"github.com/stretchr/testify/require"
"github.com/tikv/client-go/v2/util"
)
func TestCopTasksDetails(t *testing.T) {
ctx := stmtctx.NewStmtCtx()
backoffs := []string{"tikvRPC", "pdRPC", "regionMiss"}
for i := 0; i < 100; i++ {
d := &execdetails.ExecDetails{
DetailsNeedP90: execdetails.DetailsNeedP90{
CalleeAddress: fmt.Sprintf("%v", i+1),
BackoffSleep: make(map[string]time.Duration),
BackoffTimes: make(map[string]int),
TimeDetail: util.TimeDetail{
ProcessTime: time.Second * time.Duration(i+1),
WaitTime: time.Millisecond * time.Duration(i+1),
},
},
}
for _, backoff := range backoffs {
d.BackoffSleep[backoff] = time.Millisecond * 100 * time.Duration(i+1)
d.BackoffTimes[backoff] = i + 1
}
ctx.MergeExecDetails(d, nil)
}
d := ctx.CopTasksDetails()
require.Equal(t, 100, d.NumCopTasks)
require.Equal(t, time.Second*101/2, d.AvgProcessTime)
require.Equal(t, time.Second*91, d.P90ProcessTime)
require.Equal(t, time.Second*100, d.MaxProcessTime)
require.Equal(t, "100", d.MaxProcessAddress)
require.Equal(t, time.Millisecond*101/2, d.AvgWaitTime)
require.Equal(t, time.Millisecond*91, d.P90WaitTime)
require.Equal(t, time.Millisecond*100, d.MaxWaitTime)
require.Equal(t, "100", d.MaxWaitAddress)
fields := d.ToZapFields()
require.Equal(t, 9, len(fields))
for _, backoff := range backoffs {
require.Equal(t, "100", d.MaxBackoffAddress[backoff])
require.Equal(t, 100*time.Millisecond*100, d.MaxBackoffTime[backoff])
require.Equal(t, time.Millisecond*100*91, d.P90BackoffTime[backoff])
require.Equal(t, time.Millisecond*100*101/2, d.AvgBackoffTime[backoff])
require.Equal(t, 101*50, d.TotBackoffTimes[backoff])
require.Equal(t, 101*50*100*time.Millisecond, d.TotBackoffTime[backoff])
}
}
func TestStatementContextPushDownFLags(t *testing.T) {
newStmtCtx := func(fn func(*stmtctx.StatementContext)) *stmtctx.StatementContext {
sc := stmtctx.NewStmtCtx()
sc.SetErrLevels(errctx.LevelMap{})
fn(sc)
return sc
}
testCases := []struct {
in *stmtctx.StatementContext
out uint64
}{
{newStmtCtx(func(sc *stmtctx.StatementContext) { sc.InInsertStmt = true }), 8},
{newStmtCtx(func(sc *stmtctx.StatementContext) { sc.InUpdateStmt = true }), 16},
{newStmtCtx(func(sc *stmtctx.StatementContext) { sc.InDeleteStmt = true }), 16},
{newStmtCtx(func(sc *stmtctx.StatementContext) { sc.InSelectStmt = true }), 32},
{newStmtCtx(func(sc *stmtctx.StatementContext) { sc.SetTypeFlags(sc.TypeFlags().WithIgnoreTruncateErr(true)) }), 1},
{newStmtCtx(func(sc *stmtctx.StatementContext) { sc.SetTypeFlags(sc.TypeFlags().WithTruncateAsWarning(true)) }), 66},
{newStmtCtx(func(sc *stmtctx.StatementContext) { sc.SetTypeFlags(sc.TypeFlags().WithIgnoreZeroInDate(true)) }), 128},
{newStmtCtx(func(sc *stmtctx.StatementContext) {
var levels errctx.LevelMap
levels[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
sc.SetErrLevels(levels)
}), 256},
{newStmtCtx(func(sc *stmtctx.StatementContext) { sc.InLoadDataStmt = true }), 1024},
{newStmtCtx(func(sc *stmtctx.StatementContext) {
sc.InSelectStmt = true
sc.SetTypeFlags(sc.TypeFlags().WithTruncateAsWarning(true))
}), 98},
{newStmtCtx(func(sc *stmtctx.StatementContext) {
var levels errctx.LevelMap
levels[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
sc.SetErrLevels(levels)
sc.SetTypeFlags(sc.TypeFlags().WithIgnoreTruncateErr(true))
}), 257},
{newStmtCtx(func(sc *stmtctx.StatementContext) {
sc.InUpdateStmt = true
sc.SetTypeFlags(sc.TypeFlags().WithIgnoreZeroInDate(true))
sc.InLoadDataStmt = true
}), 1168},
}
for _, tt := range testCases {
got := tt.in.PushDownFlags()
require.Equal(t, tt.out, got)
}
}
func TestWeakConsistencyRead(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop table if exists t")
tk.MustExec("create table t(id int primary key, c int, c1 int, unique index i(c))")
execAndCheck := func(sql string, rows [][]any, isolationLevel kv.IsoLevel) {
ctx := context.WithValue(context.Background(), "CheckSelectRequestHook", func(req *kv.Request) {
require.Equal(t, req.IsolationLevel, isolationLevel)
})
rss, err := tk.Session().Execute(ctx, sql)
require.Nil(t, err)
for _, rs := range rss {
rs.Close()
}
if rows != nil {
tk.MustQuery(sql).Check(rows)
}
lastWeakConsistency := tk.Session().GetSessionVars().StmtCtx.WeakConsistency
require.Equal(t, lastWeakConsistency, isolationLevel == kv.RC)
}
// strict
execAndCheck("insert into t values(1, 1, 1)", nil, kv.SI)
execAndCheck("select * from t", testkit.Rows("1 1 1"), kv.SI)
tk.MustExec("prepare s from 'select * from t'")
tk.MustExec("prepare u from 'update t set c1 = id + 1'")
execAndCheck("execute s", testkit.Rows("1 1 1"), kv.SI)
execAndCheck("execute u", nil, kv.SI)
execAndCheck("admin check table t", nil, kv.SI)
// weak
tk.MustExec("set tidb_read_consistency = weak")
execAndCheck("insert into t values(2, 2, 2)", nil, kv.SI)
execAndCheck("select * from t", testkit.Rows("1 1 2", "2 2 2"), kv.RC)
execAndCheck("execute s", testkit.Rows("1 1 2", "2 2 2"), kv.RC)
execAndCheck("execute u", nil, kv.SI)
// non-read-only queries should be strict
execAndCheck("admin check table t", nil, kv.SI)
execAndCheck("update t set c = c + 1 where id = 2", nil, kv.SI)
execAndCheck("delete from t where id = 2", nil, kv.SI)
// in-transaction queries should be strict
tk.MustExec("begin")
execAndCheck("select * from t", testkit.Rows("1 1 2"), kv.SI)
execAndCheck("execute s", testkit.Rows("1 1 2"), kv.SI)
tk.MustExec("rollback")
}
func TestMarshalSQLWarn(t *testing.T) {
warns := []contextutil.SQLWarn{
{
Level: contextutil.WarnLevelError,
Err: errors.New("any error"),
},
{
Level: contextutil.WarnLevelError,
Err: errors.Trace(errors.New("any error")),
},
{
Level: contextutil.WarnLevelWarning,
Err: variable.ErrUnknownSystemVar.GenWithStackByArgs("unknown"),
},
{
Level: contextutil.WarnLevelWarning,
Err: errors.Trace(variable.ErrUnknownSystemVar.GenWithStackByArgs("unknown")),
},
}
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
// First query can trigger loading global variables, which produces warnings.
tk.MustQuery("select 1")
tk.Session().GetSessionVars().StmtCtx.SetWarnings(warns)
rows := tk.MustQuery("show warnings").Rows()
require.Equal(t, len(warns), len(rows))
// The unmarshalled result doesn't need to be exactly the same with the original one.
// We only need that the results of `show warnings` are the same.
bytes, err := json.Marshal(warns)
require.NoError(t, err)
var newWarns []contextutil.SQLWarn
err = json.Unmarshal(bytes, &newWarns)
require.NoError(t, err)
tk.Session().GetSessionVars().StmtCtx.SetWarnings(newWarns)
tk.MustQuery("show warnings").Check(rows)
}
func TestApproxRuntimeInfo(t *testing.T) {
var n = rand.Intn(19000) + 1000
var valRange = rand.Int31n(10000) + 1000
backoffs := []string{"tikvRPC", "pdRPC", "regionMiss"}
details := []*execdetails.ExecDetails{}
for i := 0; i < n; i++ {
d := &execdetails.ExecDetails{
DetailsNeedP90: execdetails.DetailsNeedP90{
CalleeAddress: fmt.Sprintf("%v", i+1),
BackoffSleep: make(map[string]time.Duration),
BackoffTimes: make(map[string]int),
TimeDetail: util.TimeDetail{
ProcessTime: time.Second * time.Duration(rand.Int31n(valRange)),
WaitTime: time.Millisecond * time.Duration(rand.Int31n(valRange)),
},
},
}
details = append(details, d)
for _, backoff := range backoffs {
d.BackoffSleep[backoff] = time.Millisecond * 100 * time.Duration(rand.Int31n(valRange))
d.BackoffTimes[backoff] = rand.Intn(int(valRange))
}
}
// Make CalleeAddress for each max value is deterministic.
details[rand.Intn(n)].DetailsNeedP90.TimeDetail.ProcessTime = time.Second * time.Duration(valRange)
details[rand.Intn(n)].DetailsNeedP90.TimeDetail.WaitTime = time.Millisecond * time.Duration(valRange)
for _, backoff := range backoffs {
details[rand.Intn(n)].BackoffSleep[backoff] = time.Millisecond * 100 * time.Duration(valRange)
}
ctx := stmtctx.NewStmtCtx()
for i := 0; i < n; i++ {
ctx.MergeExecDetails(details[i], nil)
}
d := ctx.CopTasksDetails()
require.Equal(t, d.NumCopTasks, n)
sort.Slice(details, func(i, j int) bool {
return details[i].TimeDetail.ProcessTime.Nanoseconds() < details[j].TimeDetail.ProcessTime.Nanoseconds()
})
var timeSum time.Duration
for _, detail := range details {
timeSum += detail.TimeDetail.ProcessTime
}
require.Equal(t, d.AvgProcessTime, timeSum/time.Duration(n))
require.InEpsilon(t, d.P90ProcessTime.Nanoseconds(), details[n*9/10].TimeDetail.ProcessTime.Nanoseconds(), 0.05)
require.Equal(t, d.MaxProcessTime, details[n-1].TimeDetail.ProcessTime)
require.Equal(t, d.MaxProcessAddress, details[n-1].CalleeAddress)
sort.Slice(details, func(i, j int) bool {
return details[i].TimeDetail.WaitTime.Nanoseconds() < details[j].TimeDetail.WaitTime.Nanoseconds()
})
timeSum = 0
for _, detail := range details {
timeSum += detail.TimeDetail.WaitTime
}
require.Equal(t, d.AvgWaitTime, timeSum/time.Duration(n))
require.InEpsilon(t, d.P90WaitTime.Nanoseconds(), details[n*9/10].TimeDetail.WaitTime.Nanoseconds(), 0.05)
require.Equal(t, d.MaxWaitTime, details[n-1].TimeDetail.WaitTime)
require.Equal(t, d.MaxWaitAddress, details[n-1].CalleeAddress)
fields := d.ToZapFields()
require.Equal(t, 9, len(fields))
for _, backoff := range backoffs {
sort.Slice(details, func(i, j int) bool {
return details[i].BackoffSleep[backoff].Nanoseconds() < details[j].BackoffSleep[backoff].Nanoseconds()
})
timeSum = 0
var timesSum = 0
for _, detail := range details {
timeSum += detail.BackoffSleep[backoff]
timesSum += detail.BackoffTimes[backoff]
}
require.Equal(t, d.MaxBackoffAddress[backoff], details[n-1].CalleeAddress)
require.Equal(t, d.MaxBackoffTime[backoff], details[n-1].BackoffSleep[backoff])
require.InEpsilon(t, d.P90BackoffTime[backoff], details[n*9/10].BackoffSleep[backoff], 0.1)
require.Equal(t, d.AvgBackoffTime[backoff], timeSum/time.Duration(n))
require.Equal(t, d.TotBackoffTimes[backoff], timesSum)
require.Equal(t, d.TotBackoffTime[backoff], timeSum)
}
}
func TestStmtHintsClone(t *testing.T) {
hints := hint.StmtHints{}
value := reflect.ValueOf(&hints).Elem()
for i := 0; i < value.NumField(); i++ {
field := value.Field(i)
switch field.Kind() {
case reflect.Int, reflect.Int32, reflect.Int64:
field.SetInt(1)
case reflect.Uint, reflect.Uint32, reflect.Uint64:
field.SetUint(1)
case reflect.Uint8: // byte
field.SetUint(1)
case reflect.Bool:
field.SetBool(true)
case reflect.String:
field.SetString("test")
default:
}
}
require.Equal(t, hints, *hints.Clone())
}
func TestNewStmtCtx(t *testing.T) {
sc := stmtctx.NewStmtCtx()
require.Equal(t, types.DefaultStmtFlags, sc.TypeFlags())
require.Same(t, time.UTC, sc.TimeZone())
require.Same(t, time.UTC, sc.TimeZone())
var levels errctx.LevelMap
levels[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
require.Equal(t, errctx.NewContextWithLevels(levels, sc), sc.ErrCtx())
sc.AppendWarning(errors.NewNoStackError("err1"))
warnings := sc.GetWarnings()
require.Equal(t, 1, len(warnings))
require.Equal(t, contextutil.WarnLevelWarning, warnings[0].Level)
require.Equal(t, "err1", warnings[0].Err.Error())
tz := time.FixedZone("UTC+1", 2*60*60)
sc = stmtctx.NewStmtCtxWithTimeZone(tz)
require.Equal(t, types.DefaultStmtFlags, sc.TypeFlags())
require.Same(t, tz, sc.TimeZone())
require.Same(t, tz, sc.TimeZone())
require.Equal(t, errctx.NewContextWithLevels(levels, sc), sc.ErrCtx())
sc.AppendWarning(errors.NewNoStackError("err2"))
warnings = sc.GetWarnings()
require.Equal(t, 1, len(warnings))
require.Equal(t, contextutil.WarnLevelWarning, warnings[0].Level)
require.Equal(t, "err2", warnings[0].Err.Error())
}
func TestSetStmtCtxTimeZone(t *testing.T) {
sc := stmtctx.NewStmtCtx()
require.Same(t, time.UTC, sc.TimeZone())
tz := time.FixedZone("UTC+1", 2*60*60)
sc.SetTimeZone(tz)
require.Same(t, tz, sc.TimeZone())
}
func TestSetStmtCtxTypeFlags(t *testing.T) {
sc := stmtctx.NewStmtCtx()
require.Equal(t, types.DefaultStmtFlags, sc.TypeFlags())
levels := errctx.LevelMap{}
sc.SetErrLevels(levels)
sc.SetTypeFlags(types.FlagAllowNegativeToUnsigned | types.FlagSkipASCIICheck)
require.Equal(t, types.FlagAllowNegativeToUnsigned|types.FlagSkipASCIICheck, sc.TypeFlags())
require.Equal(t, sc.TypeFlags(), sc.TypeFlags())
require.Equal(t, errctx.NewContextWithLevels(levels, sc), sc.ErrCtx())
sc.SetTypeFlags(types.FlagSkipASCIICheck | types.FlagSkipUTF8Check | types.FlagTruncateAsWarning)
require.Equal(t, types.FlagSkipASCIICheck|types.FlagSkipUTF8Check|types.FlagTruncateAsWarning, sc.TypeFlags())
require.Equal(t, sc.TypeFlags(), sc.TypeFlags())
levels[errctx.ErrGroupTruncate] = errctx.LevelWarn
require.Equal(t, errctx.NewContextWithLevels(levels, sc), sc.ErrCtx())
}
func TestResetStmtCtx(t *testing.T) {
sc := stmtctx.NewStmtCtx()
require.Equal(t, types.DefaultStmtFlags, sc.TypeFlags())
tz := time.FixedZone("UTC+1", 2*60*60)
sc.SetTimeZone(tz)
sc.SetTypeFlags(types.FlagIgnoreTruncateErr | types.FlagAllowNegativeToUnsigned | types.FlagSkipASCIICheck)
sc.AppendWarning(errors.NewNoStackError("err1"))
sc.InRestrictedSQL = true
sc.StmtType = "Insert"
require.Same(t, tz, sc.TimeZone())
require.Equal(t, types.FlagIgnoreTruncateErr|types.FlagAllowNegativeToUnsigned|types.FlagSkipASCIICheck, sc.TypeFlags())
require.Equal(t, 1, len(sc.GetWarnings()))
levels := errctx.LevelMap{}
levels[errctx.ErrGroupTruncate] = errctx.LevelIgnore
levels[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
require.Equal(t, errctx.NewContextWithLevels(levels, sc), sc.ErrCtx())
sc.Reset()
require.Same(t, time.UTC, sc.TimeZone())
require.Same(t, time.UTC, sc.TimeZone())
require.Equal(t, types.DefaultStmtFlags, sc.TypeFlags())
require.Equal(t, types.DefaultStmtFlags, sc.TypeFlags())
require.False(t, sc.InRestrictedSQL)
require.Empty(t, sc.StmtType)
require.Equal(t, 0, len(sc.GetWarnings()))
sc.AppendWarning(errors.NewNoStackError("err2"))
warnings := sc.GetWarnings()
require.Equal(t, 1, len(warnings))
require.Equal(t, contextutil.WarnLevelWarning, warnings[0].Level)
require.Equal(t, "err2", warnings[0].Err.Error())
levels = errctx.LevelMap{}
levels[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
require.Equal(t, errctx.NewContextWithLevels(levels, sc), sc.ErrCtx())
}
func TestStmtCtxID(t *testing.T) {
sc := stmtctx.NewStmtCtx()
currentID := sc.CtxID()
cases := []struct {
fn func() *stmtctx.StatementContext
}{
{func() *stmtctx.StatementContext { return stmtctx.NewStmtCtx() }},
{func() *stmtctx.StatementContext { return stmtctx.NewStmtCtxWithTimeZone(time.Local) }},
{func() *stmtctx.StatementContext {
sc.Reset()
return sc
}},
}
for _, c := range cases {
ctxID := c.fn().CtxID()
require.Greater(t, ctxID, currentID)
currentID = ctxID
}
}
func TestErrCtx(t *testing.T) {
sc := stmtctx.NewStmtCtx()
// the default errCtx
err := types.ErrTruncated
require.Error(t, sc.HandleError(err))
levels := errctx.LevelMap{}
levels[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
require.Equal(t, errctx.NewContextWithLevels(levels, sc), sc.ErrCtx())
levels[errctx.ErrGroupDividedByZero] = errctx.LevelError
// set error levels
levels[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelIgnore
sc.SetErrLevels(levels)
require.Equal(t, errctx.NewContextWithLevels(levels, sc), sc.ErrCtx())
// reset the types flags will re-initialize the error flag, but keeps the error levels unchanged except for ErrGroupTruncate
sc.SetTypeFlags(types.DefaultStmtFlags | types.FlagTruncateAsWarning)
require.NoError(t, sc.HandleError(err))
levels = errctx.LevelMap{}
levels[errctx.ErrGroupTruncate] = errctx.LevelWarn
levels[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelIgnore
require.Equal(t, errctx.NewContextWithLevels(levels, sc), sc.ErrCtx())
// SetErrLevels will not affect ErrGroupTruncate
sc.SetErrLevels(errctx.LevelMap{})
levels = errctx.LevelMap{}
levels[errctx.ErrGroupTruncate] = errctx.LevelWarn
require.Equal(t, errctx.NewContextWithLevels(levels, sc), sc.ErrCtx())
}
func TestReservedRowIDAlloc(t *testing.T) {
var reserved stmtctx.ReservedRowIDAlloc
// no reserved by default
require.True(t, reserved.Exhausted())
id, ok := reserved.Consume()
require.False(t, ok)
require.Equal(t, int64(0), id)
// reset some ids
reserved.Reset(12, 15)
require.False(t, reserved.Exhausted())
id, ok = reserved.Consume()
require.True(t, ok)
require.Equal(t, int64(13), id)
id, ok = reserved.Consume()
require.True(t, ok)
require.Equal(t, int64(14), id)
id, ok = reserved.Consume()
require.True(t, ok)
require.Equal(t, int64(15), id)
// exhausted
require.True(t, reserved.Exhausted())
id, ok = reserved.Consume()
require.False(t, ok)
require.Equal(t, int64(0), id)
}
func BenchmarkErrCtx(b *testing.B) {
sc := stmtctx.NewStmtCtx()
for i := 0; i < b.N; i++ {
sc.ErrCtx()
}
}