// Copyright 2017 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, // See the License for the specific language governing permissions and // limitations under the License. package executor_test import ( "fmt" "time" . "github.com/pingcap/check" "github.com/pingcap/tidb/statistics" "github.com/pingcap/tidb/util/testkit" ) type testShowStatsSuite struct { *baseTestSuite } func (s *testShowStatsSuite) TestShowStatsMeta(c *C) { tk := testkit.NewTestKit(c, s.store) tk.MustExec("use test") tk.MustExec("drop table if exists t, t1") tk.MustExec("create table t (a int, b int)") tk.MustExec("create table t1 (a int, b int)") tk.MustExec("analyze table t, t1") result := tk.MustQuery("show stats_meta") c.Assert(len(result.Rows()), Equals, 2) c.Assert(result.Rows()[0][1], Equals, "t") c.Assert(result.Rows()[1][1], Equals, "t1") result = tk.MustQuery("show stats_meta where table_name = 't'") c.Assert(len(result.Rows()), Equals, 1) c.Assert(result.Rows()[0][1], Equals, "t") } func (s *testShowStatsSuite) TestShowStatsHistograms(c *C) { tk := testkit.NewTestKit(c, s.store) tk.MustExec("use test") tk.MustExec("drop table if exists t") tk.MustExec("create table t (a int, b int)") tk.MustExec("analyze table t") result := tk.MustQuery("show stats_histograms") c.Assert(len(result.Rows()), Equals, 0) tk.MustExec("insert into t values(1,1)") tk.MustExec("analyze table t") result = tk.MustQuery("show stats_histograms").Sort() c.Assert(len(result.Rows()), Equals, 2) c.Assert(result.Rows()[0][3], Equals, "a") c.Assert(result.Rows()[1][3], Equals, "b") result = tk.MustQuery("show stats_histograms where column_name = 'a'") c.Assert(len(result.Rows()), Equals, 1) c.Assert(result.Rows()[0][3], Equals, "a") tk.MustExec("drop table t") tk.MustExec("create table t(a int, b int, c int, index idx_b(b), index idx_c_a(c, a))") tk.MustExec("insert into t values(1,null,1),(2,null,2),(3,3,3),(4,null,4),(null,null,null)") res := tk.MustQuery("show stats_histograms where table_name = 't'") c.Assert(len(res.Rows()), Equals, 0) tk.MustExec("analyze table t index idx_b") res = tk.MustQuery("show stats_histograms where table_name = 't' and column_name = 'idx_b'") c.Assert(len(res.Rows()), Equals, 1) } func (s *testShowStatsSuite) TestShowStatsBuckets(c *C) { tk := testkit.NewTestKit(c, s.store) tk.MustExec("use test") tk.MustExec("drop table if exists t") tk.MustExec("create table t (a int, b int)") tk.MustExec("create index idx on t(a,b)") tk.MustExec("insert into t values (1,1)") tk.MustExec("analyze table t") result := tk.MustQuery("show stats_buckets").Sort() result.Check(testkit.Rows("test t a 0 0 1 1 1 1", "test t b 0 0 1 1 1 1", "test t idx 1 0 1 1 (1, 1) (1, 1)")) result = tk.MustQuery("show stats_buckets where column_name = 'idx'") result.Check(testkit.Rows("test t idx 1 0 1 1 (1, 1) (1, 1)")) tk.MustExec("drop table t") tk.MustExec("create table t (`a` datetime, `b` int, key `idx`(`a`, `b`))") tk.MustExec("insert into t values (\"2020-01-01\", 1)") tk.MustExec("analyze table t") result = tk.MustQuery("show stats_buckets").Sort() result.Check(testkit.Rows("test t a 0 0 1 1 2020-01-01 00:00:00 2020-01-01 00:00:00", "test t b 0 0 1 1 1 1", "test t idx 1 0 1 1 (2020-01-01 00:00:00, 1) (2020-01-01 00:00:00, 1)")) result = tk.MustQuery("show stats_buckets where column_name = 'idx'") result.Check(testkit.Rows("test t idx 1 0 1 1 (2020-01-01 00:00:00, 1) (2020-01-01 00:00:00, 1)")) tk.MustExec("drop table t") tk.MustExec("create table t (`a` date, `b` int, key `idx`(`a`, `b`))") tk.MustExec("insert into t values (\"2020-01-01\", 1)") tk.MustExec("analyze table t") result = tk.MustQuery("show stats_buckets").Sort() result.Check(testkit.Rows("test t a 0 0 1 1 2020-01-01 2020-01-01", "test t b 0 0 1 1 1 1", "test t idx 1 0 1 1 (2020-01-01, 1) (2020-01-01, 1)")) result = tk.MustQuery("show stats_buckets where column_name = 'idx'") result.Check(testkit.Rows("test t idx 1 0 1 1 (2020-01-01, 1) (2020-01-01, 1)")) tk.MustExec("drop table t") tk.MustExec("create table t (`a` timestamp, `b` int, key `idx`(`a`, `b`))") tk.MustExec("insert into t values (\"2020-01-01\", 1)") tk.MustExec("analyze table t") result = tk.MustQuery("show stats_buckets").Sort() result.Check(testkit.Rows("test t a 0 0 1 1 2020-01-01 00:00:00 2020-01-01 00:00:00", "test t b 0 0 1 1 1 1", "test t idx 1 0 1 1 (2020-01-01 00:00:00, 1) (2020-01-01 00:00:00, 1)")) result = tk.MustQuery("show stats_buckets where column_name = 'idx'") result.Check(testkit.Rows("test t idx 1 0 1 1 (2020-01-01 00:00:00, 1) (2020-01-01 00:00:00, 1)")) } func (s *testShowStatsSuite) TestShowStatsHasNullValue(c *C) { tk := testkit.NewTestKit(c, s.store) tk.MustExec("use test") tk.MustExec("drop table if exists t") tk.MustExec("create table t (a int, index idx(a))") tk.MustExec("insert into t values(NULL)") tk.MustExec("analyze table t") // Null values are excluded from histogram for single-column index. tk.MustQuery("show stats_buckets").Check(testkit.Rows()) tk.MustExec("insert into t values(1)") tk.MustExec("analyze table t") tk.MustQuery("show stats_buckets").Sort().Check(testkit.Rows( "test t a 0 0 1 1 1 1", "test t idx 1 0 1 1 1 1", )) tk.MustExec("drop table t") tk.MustExec("create table t (a int, b int, index idx(a, b))") tk.MustExec("insert into t values(NULL, NULL)") tk.MustExec("analyze table t") tk.MustQuery("show stats_buckets").Check(testkit.Rows("test t idx 1 0 1 1 (NULL, NULL) (NULL, NULL)")) tk.MustExec("drop table t") tk.MustExec("create table t(a int, b int, c int, index idx_b(b), index idx_c_a(c, a))") tk.MustExec("insert into t values(1,null,1),(2,null,2),(3,3,3),(4,null,4),(null,null,null)") res := tk.MustQuery("show stats_histograms where table_name = 't'") c.Assert(len(res.Rows()), Equals, 0) tk.MustExec("analyze table t index idx_b") res = tk.MustQuery("show stats_histograms where table_name = 't' and column_name = 'idx_b'") c.Assert(len(res.Rows()), Equals, 1) c.Assert(res.Rows()[0][7], Equals, "4") res = tk.MustQuery("show stats_histograms where table_name = 't' and column_name = 'b'") c.Assert(len(res.Rows()), Equals, 0) tk.MustExec("analyze table t index idx_c_a") res = tk.MustQuery("show stats_histograms where table_name = 't' and column_name = 'idx_c_a'") c.Assert(len(res.Rows()), Equals, 1) c.Assert(res.Rows()[0][7], Equals, "0") res = tk.MustQuery("show stats_histograms where table_name = 't' and column_name = 'c'") c.Assert(len(res.Rows()), Equals, 0) res = tk.MustQuery("show stats_histograms where table_name = 't' and column_name = 'a'") c.Assert(len(res.Rows()), Equals, 0) tk.MustExec("truncate table t") tk.MustExec("insert into t values(1,null,1),(2,null,2),(3,3,3),(4,null,4),(null,null,null)") res = tk.MustQuery("show stats_histograms where table_name = 't'") c.Assert(len(res.Rows()), Equals, 0) tk.MustExec("analyze table t index") res = tk.MustQuery("show stats_histograms where table_name = 't'").Sort() c.Assert(len(res.Rows()), Equals, 2) c.Assert(res.Rows()[0][7], Equals, "4") c.Assert(res.Rows()[1][7], Equals, "0") tk.MustExec("truncate table t") tk.MustExec("insert into t values(1,null,1),(2,null,2),(3,3,3),(4,null,4),(null,null,null)") tk.MustExec("analyze table t") res = tk.MustQuery("show stats_histograms where table_name = 't'").Sort() c.Assert(len(res.Rows()), Equals, 5) c.Assert(res.Rows()[0][7], Equals, "1") c.Assert(res.Rows()[1][7], Equals, "4") c.Assert(res.Rows()[2][7], Equals, "1") c.Assert(res.Rows()[3][7], Equals, "4") c.Assert(res.Rows()[4][7], Equals, "0") } func (s *testShowStatsSuite) TestShowPartitionStats(c *C) { tk := testkit.NewTestKit(c, s.store) tk.MustExec("set @@session.tidb_enable_table_partition=1") tk.MustExec("use test") tk.MustExec("drop table if exists t") createTable := `CREATE TABLE t (a int, b int, primary key(a), index idx(b)) PARTITION BY RANGE ( a ) (PARTITION p0 VALUES LESS THAN (6))` tk.MustExec(createTable) tk.MustExec(`insert into t values (1, 1)`) tk.MustExec("analyze table t") result := tk.MustQuery("show stats_meta") c.Assert(len(result.Rows()), Equals, 1) c.Assert(result.Rows()[0][0], Equals, "test") c.Assert(result.Rows()[0][1], Equals, "t") c.Assert(result.Rows()[0][2], Equals, "p0") result = tk.MustQuery("show stats_histograms").Sort() c.Assert(len(result.Rows()), Equals, 3) c.Assert(result.Rows()[0][2], Equals, "p0") c.Assert(result.Rows()[0][3], Equals, "a") c.Assert(result.Rows()[1][2], Equals, "p0") c.Assert(result.Rows()[1][3], Equals, "b") c.Assert(result.Rows()[2][2], Equals, "p0") c.Assert(result.Rows()[2][3], Equals, "idx") result = tk.MustQuery("show stats_buckets").Sort() result.Check(testkit.Rows("test t p0 a 0 0 1 1 1 1", "test t p0 b 0 0 1 1 1 1", "test t p0 idx 1 0 1 1 1 1")) result = tk.MustQuery("show stats_healthy") result.Check(testkit.Rows("test t p0 100")) } func (s *testShowStatsSuite) TestShowAnalyzeStatus(c *C) { tk := testkit.NewTestKit(c, s.store) statistics.ClearHistoryJobs() tk.MustExec("use test") tk.MustExec("drop table if exists t") tk.MustExec("create table t (a int, b int, primary key(a), index idx(b))") tk.MustExec(`insert into t values (1, 1), (2, 2)`) tk.MustExec("analyze table t") result := tk.MustQuery("show analyze status").Sort() c.Assert(len(result.Rows()), Equals, 2) c.Assert(result.Rows()[0][0], Equals, "test") c.Assert(result.Rows()[0][1], Equals, "t") c.Assert(result.Rows()[0][2], Equals, "") c.Assert(result.Rows()[0][3], Equals, "analyze columns") c.Assert(result.Rows()[0][4], Equals, "2") c.Assert(result.Rows()[0][5], NotNil) c.Assert(result.Rows()[0][6], Equals, "finished") c.Assert(len(result.Rows()), Equals, 2) c.Assert(result.Rows()[1][0], Equals, "test") c.Assert(result.Rows()[1][1], Equals, "t") c.Assert(result.Rows()[1][2], Equals, "") c.Assert(result.Rows()[1][3], Equals, "analyze index idx") c.Assert(result.Rows()[1][4], Equals, "2") c.Assert(result.Rows()[1][5], NotNil) c.Assert(result.Rows()[1][6], Equals, "finished") } func (s *testShowStatsSuite) TestShowStatusSnapshot(c *C) { tk := testkit.NewTestKit(c, s.store) tk.MustExec("drop database if exists test;") tk.MustExec("create database test;") tk.MustExec("use test;") tk.MustExec("create table t (a int);") // For mocktikv, safe point is not initialized, we manually insert it for snapshot to use. safePointName := "tikv_gc_safe_point" safePointValue := "20060102-15:04:05 -0700" safePointComment := "All versions after safe point can be accessed. (DO NOT EDIT)" updateSafePoint := fmt.Sprintf(`INSERT INTO mysql.tidb VALUES ('%[1]s', '%[2]s', '%[3]s') ON DUPLICATE KEY UPDATE variable_value = '%[2]s', comment = '%[3]s'`, safePointName, safePointValue, safePointComment) tk.MustExec(updateSafePoint) snapshotTime := time.Now() tk.MustExec("drop table t;") tk.MustQuery("show table status;").Check(testkit.Rows()) tk.MustExec("set @@tidb_snapshot = '" + snapshotTime.Format("2006-01-02 15:04:05.999999") + "'") result := tk.MustQuery("show table status;") c.Check(result.Rows()[0][0], Matches, "t") }