89 lines
3.2 KiB
Go
89 lines
3.2 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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"strings"
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"testing"
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"github.com/pingcap/tidb/domain"
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"github.com/pingcap/tidb/statistics/handle"
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"github.com/pingcap/tidb/testkit"
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"github.com/stretchr/testify/require"
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)
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func TestOutdatedStatsCheck(t *testing.T) {
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domain.RunAutoAnalyze = false
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store, dom, clean := testkit.CreateMockStoreAndDomain(t)
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defer clean()
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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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handle.AutoAnalyzeMinCnt = 0
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defer func() {
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handle.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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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(handle.DumpAll))
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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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tk.MustExec("insert into t values (1)" + strings.Repeat(", (1)", 13)) // 34 rows
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require.NoError(t, h.DumpStatsDeltaToKV(handle.DumpAll))
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require.NoError(t, h.Update(is))
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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(handle.DumpAll))
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require.NoError(t, h.Update(is))
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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(handle.DumpAll))
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require.NoError(t, h.Update(is))
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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(handle.DumpAll))
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require.NoError(t, h.Update(is))
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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 [][]interface{}) 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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