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show_stats_test.go
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show_stats_test.go
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// 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 (
. "github.com/pingcap/check"
"github.com/pingcap/tidb/statistics"
"github.com/pingcap/tidb/util/testkit"
)
type testShowStatsSuite struct {
testSuite
}
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)"))
}
func (s *testShowStatsSuite) TestShowStatsHasNullValue(c *C) {
tk := testkit.NewTestKit(c, s.store)
tk.MustExec("use test")
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")
}