484 lines
20 KiB
Go
484 lines
20 KiB
Go
// Copyright 2021 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 statistics_test
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import (
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"fmt"
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"math"
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"strconv"
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"strings"
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"testing"
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"time"
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"github.com/pingcap/failpoint"
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"github.com/pingcap/tidb/pkg/parser/model"
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"github.com/pingcap/tidb/pkg/statistics"
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"github.com/pingcap/tidb/pkg/statistics/handle/autoanalyze/exec"
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"github.com/pingcap/tidb/pkg/testkit"
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"github.com/pingcap/tidb/pkg/testkit/testdata"
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"github.com/stretchr/testify/require"
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)
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func TestChangeVerTo2Behavior(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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tk := testkit.NewTestKit(t, store)
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originalVal1 := tk.MustQuery("select @@tidb_persist_analyze_options").Rows()[0][0].(string)
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defer func() {
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tk.MustExec(fmt.Sprintf("set global tidb_persist_analyze_options = %v", originalVal1))
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}()
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tk.MustExec("set global tidb_persist_analyze_options=false")
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tk.MustExec("use test")
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tk.MustExec("create table t(a int, b int, index idx(a))")
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tk.MustExec("set @@session.tidb_analyze_version = 1")
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tk.MustExec("insert into t values(1, 1), (1, 2), (1, 3)")
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tk.MustExec("analyze table t")
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is := dom.InfoSchema()
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tblT, err := is.TableByName(model.NewCIStr("test"), model.NewCIStr("t"))
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require.NoError(t, err)
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h := dom.StatsHandle()
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require.NoError(t, h.Update(is))
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statsTblT := h.GetTableStats(tblT.Meta())
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// Analyze table with version 1 success, all statistics are version 1.
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for _, col := range statsTblT.Columns {
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require.Equal(t, int64(1), col.GetStatsVer())
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}
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(1), idx.GetStatsVer())
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}
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tk.MustExec("set @@session.tidb_analyze_version = 2")
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tk.MustExec("analyze table t index idx")
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tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1105 The analyze version from the session is not compatible with the existing statistics of the table. Use the existing version instead"))
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(1), idx.GetStatsVer())
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}
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tk.MustExec("analyze table t index")
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tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1105 The analyze version from the session is not compatible with the existing statistics of the table. Use the existing version instead"))
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(1), idx.GetStatsVer())
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}
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tk.MustExec("analyze table t ")
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, col := range statsTblT.Columns {
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require.Equal(t, int64(2), col.GetStatsVer())
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}
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(2), idx.GetStatsVer())
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}
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tk.MustExec("set @@session.tidb_analyze_version = 1")
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tk.MustExec("analyze table t index idx")
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tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1105 The analyze version from the session is not compatible with the existing statistics of the table. Use the existing version instead",
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"Warning 1105 The version 2 would collect all statistics not only the selected indexes"))
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(2), idx.GetStatsVer())
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}
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tk.MustExec("analyze table t index")
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tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1105 The analyze version from the session is not compatible with the existing statistics of the table. Use the existing version instead",
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"Warning 1105 The version 2 would collect all statistics not only the selected indexes"))
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(2), idx.GetStatsVer())
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}
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tk.MustExec("analyze table t ")
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, col := range statsTblT.Columns {
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require.Equal(t, int64(1), col.GetStatsVer())
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}
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(1), idx.GetStatsVer())
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}
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}
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func TestChangeVerTo2BehaviorWithPersistedOptions(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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tk := testkit.NewTestKit(t, store)
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originalVal1 := tk.MustQuery("select @@tidb_persist_analyze_options").Rows()[0][0].(string)
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defer func() {
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tk.MustExec(fmt.Sprintf("set global tidb_persist_analyze_options = %v", originalVal1))
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}()
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tk.MustExec("set global tidb_persist_analyze_options=true")
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tk.MustExec("use test")
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tk.MustExec("create table t(a int, b int, index idx(a))")
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tk.MustExec("set @@session.tidb_analyze_version = 1")
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tk.MustExec("insert into t values(1, 1), (1, 2), (1, 3)")
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tk.MustExec("analyze table t")
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is := dom.InfoSchema()
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tblT, err := is.TableByName(model.NewCIStr("test"), model.NewCIStr("t"))
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require.NoError(t, err)
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h := dom.StatsHandle()
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require.NoError(t, h.Update(is))
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statsTblT := h.GetTableStats(tblT.Meta())
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// Analyze table with version 1 success, all statistics are version 1.
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for _, col := range statsTblT.Columns {
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require.Equal(t, int64(1), col.GetStatsVer())
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}
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(1), idx.GetStatsVer())
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}
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tk.MustExec("set @@session.tidb_analyze_version = 2")
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tk.MustExec("analyze table t index idx")
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tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1105 The analyze version from the session is not compatible with the existing statistics of the table. Use the existing version instead"))
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(1), idx.GetStatsVer())
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}
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tk.MustExec("analyze table t index")
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tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1105 The analyze version from the session is not compatible with the existing statistics of the table. Use the existing version instead"))
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(1), idx.GetStatsVer())
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}
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tk.MustExec("analyze table t ")
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, col := range statsTblT.Columns {
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require.Equal(t, int64(2), col.GetStatsVer())
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}
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(2), idx.GetStatsVer())
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}
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tk.MustExec("set @@session.tidb_analyze_version = 1")
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tk.MustExec("analyze table t index idx")
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tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1105 The analyze version from the session is not compatible with the existing statistics of the table. Use the existing version instead",
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"Warning 1105 The version 2 would collect all statistics not only the selected indexes",
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"Note 1105 Analyze use auto adjusted sample rate 1.000000 for table test.t, reason to use this rate is \"use min(1, 110000/3) as the sample-rate=1\"")) // since fallback to ver2 path, should do samplerate adjustment
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(2), idx.GetStatsVer())
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}
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tk.MustExec("analyze table t index")
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tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1105 The analyze version from the session is not compatible with the existing statistics of the table. Use the existing version instead",
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"Warning 1105 The version 2 would collect all statistics not only the selected indexes",
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"Note 1105 Analyze use auto adjusted sample rate 1.000000 for table test.t, reason to use this rate is \"use min(1, 110000/3) as the sample-rate=1\""))
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(2), idx.GetStatsVer())
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}
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tk.MustExec("analyze table t ")
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require.NoError(t, h.Update(is))
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statsTblT = h.GetTableStats(tblT.Meta())
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for _, col := range statsTblT.Columns {
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require.Equal(t, int64(1), col.GetStatsVer())
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}
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for _, idx := range statsTblT.Indices {
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require.Equal(t, int64(1), idx.GetStatsVer())
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}
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}
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func TestExpBackoffEstimation(t *testing.T) {
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store := testkit.CreateMockStore(t)
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tk := testkit.NewTestKit(t, store)
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tk.MustExec("use test")
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tk.MustExec(`set @@tidb_enable_non_prepared_plan_cache=0`) // estRows won't be updated if hit cache.
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tk.MustExec("set tidb_cost_model_version=2")
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tk.MustExec("create table exp_backoff(a int, b int, c int, d int, index idx(a, b, c, d))")
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tk.MustExec("insert into exp_backoff values(1, 1, 1, 1), (1, 1, 1, 2), (1, 1, 2, 3), (1, 2, 2, 4), (1, 2, 3, 5)")
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tk.MustExec("set @@session.tidb_analyze_version=2")
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tk.MustExec("analyze table exp_backoff")
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var (
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input []string
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output [][]string
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)
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integrationSuiteData := statistics.GetIntegrationSuiteData()
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integrationSuiteData.LoadTestCases(t, &input, &output)
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inputLen := len(input)
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// The test cases are:
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// Query a = 1, b = 1, c = 1, d >= 3 and d <= 5 separately. We got 5, 3, 2, 3.
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// And then query and a = 1 and b = 1 and c = 1 and d >= 3 and d <= 5. It's result should follow the exp backoff,
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// which is 2/5 * (3/5)^{1/2} * (3/5)*{1/4} * 1^{1/8} * 5 = 1.3634.
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for i := 0; i < inputLen-1; i++ {
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testdata.OnRecord(func() {
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output[i] = testdata.ConvertRowsToStrings(tk.MustQuery(input[i]).Rows())
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})
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tk.MustQuery(input[i]).Check(testkit.Rows(output[i]...))
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}
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// The last case is that no column is loaded and we get no stats at all.
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require.NoError(t, failpoint.Enable("github.com/pingcap/tidb/pkg/planner/cardinality/cleanEstResults", `return(true)`))
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testdata.OnRecord(func() {
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output[inputLen-1] = testdata.ConvertRowsToStrings(tk.MustQuery(input[inputLen-1]).Rows())
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})
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tk.MustQuery(input[inputLen-1]).Check(testkit.Rows(output[inputLen-1]...))
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require.NoError(t, failpoint.Disable("github.com/pingcap/tidb/pkg/planner/cardinality/cleanEstResults"))
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}
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func TestNULLOnFullSampling(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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tk := testkit.NewTestKit(t, store)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t;")
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tk.MustExec("set @@session.tidb_analyze_version = 2;")
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tk.MustExec("create table t(a int, index idx(a))")
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tk.MustExec("insert into t values(1), (1), (1), (2), (2), (3), (4), (null), (null), (null)")
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var (
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input []string
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output [][]string
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)
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tk.MustExec("analyze table t with 2 topn")
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is := dom.InfoSchema()
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tblT, err := is.TableByName(model.NewCIStr("test"), model.NewCIStr("t"))
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require.NoError(t, err)
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h := dom.StatsHandle()
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require.NoError(t, h.Update(is))
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statsTblT := h.GetTableStats(tblT.Meta())
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// Check the null count is 3.
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for _, col := range statsTblT.Columns {
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require.Equal(t, int64(3), col.NullCount)
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}
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integrationSuiteData := statistics.GetIntegrationSuiteData()
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integrationSuiteData.LoadTestCases(t, &input, &output)
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// Check the topn and buckets contains no null values.
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for i := 0; i < len(input); i++ {
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testdata.OnRecord(func() {
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output[i] = testdata.ConvertRowsToStrings(tk.MustQuery(input[i]).Rows())
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})
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tk.MustQuery(input[i]).Check(testkit.Rows(output[i]...))
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}
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}
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func TestAnalyzeSnapshot(t *testing.T) {
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store := testkit.CreateMockStore(t)
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tk := testkit.NewTestKit(t, store)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t")
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tk.MustExec("set @@session.tidb_analyze_version = 2;")
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tk.MustExec("create table t(a int, index(a))")
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tk.MustExec("insert into t values(1), (1), (1)")
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tk.MustExec("analyze table t")
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rows := tk.MustQuery("select count, snapshot, version from mysql.stats_meta").Rows()
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require.Len(t, rows, 1)
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require.Equal(t, "3", rows[0][0])
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s1Str := rows[0][1].(string)
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s1, err := strconv.ParseUint(s1Str, 10, 64)
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require.NoError(t, err)
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require.True(t, s1 < math.MaxUint64)
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// TestHistogramsWithSameTxnTS
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v1 := rows[0][2].(string)
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rows = tk.MustQuery("select version from mysql.stats_histograms").Rows()
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require.Len(t, rows, 2)
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v2 := rows[0][0].(string)
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require.Equal(t, v1, v2)
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v3 := rows[1][0].(string)
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require.Equal(t, v2, v3)
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tk.MustExec("insert into t values(1), (1), (1)")
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tk.MustExec("analyze table t")
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rows = tk.MustQuery("select count, snapshot from mysql.stats_meta").Rows()
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require.Len(t, rows, 1)
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require.Equal(t, "6", rows[0][0])
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s2Str := rows[0][1].(string)
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s2, err := strconv.ParseUint(s2Str, 10, 64)
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require.NoError(t, err)
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require.True(t, s2 < math.MaxUint64)
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require.True(t, s2 > s1)
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}
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func TestOutdatedStatsCheck(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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tk := testkit.NewTestKit(t, store)
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oriStart := tk.MustQuery("select @@tidb_auto_analyze_start_time").Rows()[0][0].(string)
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oriEnd := tk.MustQuery("select @@tidb_auto_analyze_end_time").Rows()[0][0].(string)
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exec.AutoAnalyzeMinCnt = 0
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defer func() {
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exec.AutoAnalyzeMinCnt = 1000
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tk.MustExec(fmt.Sprintf("set global tidb_auto_analyze_start_time='%v'", oriStart))
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tk.MustExec(fmt.Sprintf("set global tidb_auto_analyze_end_time='%v'", oriEnd))
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}()
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tk.MustExec("set global tidb_auto_analyze_start_time='00:00 +0000'")
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tk.MustExec("set global tidb_auto_analyze_end_time='23:59 +0000'")
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tk.MustExec("set session tidb_enable_pseudo_for_outdated_stats=1")
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h := dom.StatsHandle()
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tk.MustExec("use test")
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tk.MustExec("create table t (a int)")
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require.NoError(t, h.HandleDDLEvent(<-h.DDLEventCh()))
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tk.MustExec("insert into t values (1)" + strings.Repeat(", (1)", 19)) // 20 rows
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require.NoError(t, h.DumpStatsDeltaToKV(true))
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is := dom.InfoSchema()
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require.NoError(t, h.Update(is))
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// To pass the stats.Pseudo check in autoAnalyzeTable
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tk.MustExec("analyze table t")
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tk.MustExec("explain select * from t where a = 1")
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require.NoError(t, h.LoadNeededHistograms())
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getStatsHealthy := func() int {
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rows := tk.MustQuery("show stats_healthy where db_name = 'test' and table_name = 't'").Rows()
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require.Len(t, rows, 1)
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healthy, err := strconv.Atoi(rows[0][3].(string))
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require.NoError(t, err)
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return healthy
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}
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tk.MustExec("insert into t values (1)" + strings.Repeat(", (1)", 13)) // 34 rows
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require.NoError(t, h.DumpStatsDeltaToKV(true))
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require.NoError(t, h.Update(is))
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require.Equal(t, getStatsHealthy(), 30)
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require.False(t, hasPseudoStats(tk.MustQuery("explain select * from t where a = 1").Rows()))
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tk.MustExec("insert into t values (1)") // 35 rows
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require.NoError(t, h.DumpStatsDeltaToKV(true))
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require.NoError(t, h.Update(is))
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require.Equal(t, getStatsHealthy(), 25)
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require.True(t, hasPseudoStats(tk.MustQuery("explain select * from t where a = 1").Rows()))
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tk.MustExec("analyze table t")
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tk.MustExec("delete from t limit 24") // 11 rows
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require.NoError(t, h.DumpStatsDeltaToKV(true))
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require.NoError(t, h.Update(is))
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require.Equal(t, getStatsHealthy(), 31)
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require.False(t, hasPseudoStats(tk.MustQuery("explain select * from t where a = 1").Rows()))
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tk.MustExec("delete from t limit 1") // 10 rows
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require.NoError(t, h.DumpStatsDeltaToKV(true))
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require.NoError(t, h.Update(is))
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require.Equal(t, getStatsHealthy(), 28)
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require.True(t, hasPseudoStats(tk.MustQuery("explain select * from t where a = 1").Rows()))
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}
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func hasPseudoStats(rows [][]any) bool {
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for i := range rows {
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if strings.Contains(rows[i][4].(string), "stats:pseudo") {
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return true
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}
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}
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return false
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}
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func TestShowHistogramsLoadStatus(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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tk := testkit.NewTestKit(t, store)
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h := dom.StatsHandle()
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origLease := h.Lease()
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h.SetLease(time.Second)
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defer func() { h.SetLease(origLease) }()
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tk.MustExec("use test")
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tk.MustExec("create table t(a int primary key, b int, c int, index idx(b, c))")
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require.NoError(t, h.HandleDDLEvent(<-h.DDLEventCh()))
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tk.MustExec("insert into t values (1,2,3), (4,5,6)")
|
|
require.NoError(t, h.DumpStatsDeltaToKV(true))
|
|
tk.MustExec("analyze table t")
|
|
require.NoError(t, h.Update(dom.InfoSchema()))
|
|
rows := tk.MustQuery("show stats_histograms where db_name = 'test' and table_name = 't'").Rows()
|
|
for _, row := range rows {
|
|
require.Equal(t, "allEvicted", row[10].(string))
|
|
}
|
|
}
|
|
|
|
func TestSingleColumnIndexNDV(t *testing.T) {
|
|
store, dom := testkit.CreateMockStoreAndDomain(t)
|
|
tk := testkit.NewTestKit(t, store)
|
|
h := dom.StatsHandle()
|
|
tk.MustExec("use test")
|
|
tk.MustExec("create table t(a int, b int, c varchar(20), d varchar(20), index idx_a(a), index idx_b(b), index idx_c(c), index idx_d(d))")
|
|
require.NoError(t, h.HandleDDLEvent(<-h.DDLEventCh()))
|
|
tk.MustExec("insert into t values (1, 1, 'xxx', 'zzz'), (2, 2, 'yyy', 'zzz'), (1, 3, null, 'zzz')")
|
|
for i := 0; i < 5; i++ {
|
|
tk.MustExec("insert into t select * from t")
|
|
}
|
|
tk.MustExec("analyze table t")
|
|
rows := tk.MustQuery("show stats_histograms where db_name = 'test' and table_name = 't'").Sort().Rows()
|
|
expectedResults := [][]string{
|
|
{"a", "2", "0"}, {"b", "3", "0"}, {"c", "2", "32"}, {"d", "1", "0"},
|
|
{"idx_a", "2", "0"}, {"idx_b", "3", "0"}, {"idx_c", "2", "32"}, {"idx_d", "1", "0"},
|
|
}
|
|
for i, row := range rows {
|
|
require.Equal(t, expectedResults[i][0], row[3]) // column_name
|
|
require.Equal(t, expectedResults[i][1], row[6]) // distinct_count
|
|
require.Equal(t, expectedResults[i][2], row[7]) // null_count
|
|
}
|
|
}
|
|
|
|
func TestColumnStatsLazyLoad(t *testing.T) {
|
|
store, dom := testkit.CreateMockStoreAndDomain(t)
|
|
tk := testkit.NewTestKit(t, store)
|
|
h := dom.StatsHandle()
|
|
originLease := h.Lease()
|
|
defer h.SetLease(originLease)
|
|
// Set `Lease` to `Millisecond` to enable column stats lazy load.
|
|
h.SetLease(time.Millisecond)
|
|
tk.MustExec("use test")
|
|
tk.MustExec("create table t(a int, b int)")
|
|
tk.MustExec("insert into t values (1,2), (3,4), (5,6), (7,8)")
|
|
require.NoError(t, h.HandleDDLEvent(<-h.DDLEventCh()))
|
|
tk.MustExec("analyze table t")
|
|
is := dom.InfoSchema()
|
|
tbl, err := is.TableByName(model.NewCIStr("test"), model.NewCIStr("t"))
|
|
require.NoError(t, err)
|
|
tblInfo := tbl.Meta()
|
|
c1 := tblInfo.Columns[0]
|
|
c2 := tblInfo.Columns[1]
|
|
require.True(t, h.GetTableStats(tblInfo).Columns[c1.ID].IsAllEvicted())
|
|
require.True(t, h.GetTableStats(tblInfo).Columns[c2.ID].IsAllEvicted())
|
|
tk.MustExec("analyze table t")
|
|
require.True(t, h.GetTableStats(tblInfo).Columns[c1.ID].IsAllEvicted())
|
|
require.True(t, h.GetTableStats(tblInfo).Columns[c2.ID].IsAllEvicted())
|
|
}
|
|
|
|
func TestUpdateNotLoadIndexFMSketch(t *testing.T) {
|
|
store, dom := testkit.CreateMockStoreAndDomain(t)
|
|
tk := testkit.NewTestKit(t, store)
|
|
h := dom.StatsHandle()
|
|
tk.MustExec("use test")
|
|
tk.MustExec("create table t(a int, b int, index idx(a)) partition by range (a) (partition p0 values less than (10),partition p1 values less than maxvalue)")
|
|
tk.MustExec("insert into t values (1,2), (3,4), (5,6), (7,8)")
|
|
require.NoError(t, h.HandleDDLEvent(<-h.DDLEventCh()))
|
|
tk.MustExec("analyze table t")
|
|
is := dom.InfoSchema()
|
|
tbl, err := is.TableByName(model.NewCIStr("test"), model.NewCIStr("t"))
|
|
require.NoError(t, err)
|
|
tblInfo := tbl.Meta()
|
|
idxInfo := tblInfo.Indices[0]
|
|
p0 := tblInfo.Partition.Definitions[0]
|
|
p1 := tblInfo.Partition.Definitions[1]
|
|
require.Nil(t, h.GetPartitionStats(tblInfo, p0.ID).Indices[idxInfo.ID].FMSketch)
|
|
require.Nil(t, h.GetPartitionStats(tblInfo, p1.ID).Indices[idxInfo.ID].FMSketch)
|
|
h.Clear()
|
|
require.NoError(t, h.Update(is))
|
|
require.Nil(t, h.GetPartitionStats(tblInfo, p0.ID).Indices[idxInfo.ID].FMSketch)
|
|
require.Nil(t, h.GetPartitionStats(tblInfo, p1.ID).Indices[idxInfo.ID].FMSketch)
|
|
}
|
|
|
|
func TestIssue44369(t *testing.T) {
|
|
store, dom := testkit.CreateMockStoreAndDomain(t)
|
|
h := dom.StatsHandle()
|
|
tk := testkit.NewTestKit(t, store)
|
|
tk.MustExec("use test")
|
|
tk.MustExec("create table t(a int, b int, index iab(a,b));")
|
|
require.NoError(t, h.HandleDDLEvent(<-h.DDLEventCh()))
|
|
tk.MustExec("insert into t value(1,1);")
|
|
require.NoError(t, h.DumpStatsDeltaToKV(true))
|
|
tk.MustExec("analyze table t;")
|
|
is := dom.InfoSchema()
|
|
require.NoError(t, h.Update(is))
|
|
tk.MustExec("alter table t rename column b to bb;")
|
|
tk.MustExec("select * from t where a = 10 and bb > 20;")
|
|
}
|