118 lines
3.7 KiB
Go
118 lines
3.7 KiB
Go
// Copyright 2018 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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// 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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. "github.com/pingcap/check"
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"github.com/pingcap/parser/model"
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"github.com/pingcap/tidb/statistics"
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"github.com/pingcap/tidb/util/testkit"
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)
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func (s *testStatsSuite) TestConversion(c *C) {
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defer cleanEnv(c, s.store, s.do)
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tk := testkit.NewTestKit(c, s.store)
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tk.MustExec("use test")
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tk.MustExec("create table t (a int, b int)")
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tk.MustExec("create index c on t(a,b)")
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tk.MustExec("insert into t(a,b) values (3, 1),(2, 1),(1, 10)")
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tk.MustExec("analyze table t")
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tk.MustExec("insert into t(a,b) values (1, 1),(3, 1),(5, 10)")
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is := s.do.InfoSchema()
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h := s.do.StatsHandle()
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h.DumpStatsDeltaToKV(statistics.DumpAll)
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h.Update(is)
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tableInfo, err := is.TableByName(model.NewCIStr("test"), model.NewCIStr("t"))
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c.Assert(err, IsNil)
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jsonTbl, err := h.DumpStatsToJSON("test", tableInfo.Meta())
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c.Assert(err, IsNil)
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loadTbl, err := statistics.TableStatsFromJSON(tableInfo.Meta(), tableInfo.Meta().ID, jsonTbl)
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c.Assert(err, IsNil)
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tbl := h.GetTableStats(tableInfo.Meta())
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assertTableEqual(c, loadTbl, tbl)
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err = h.LoadStatsFromJSON(is, jsonTbl)
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c.Assert(err, IsNil)
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loadTblInStorage := h.GetTableStats(tableInfo.Meta())
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assertTableEqual(c, loadTblInStorage, tbl)
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}
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func (s *testStatsSuite) TestDumpPartitions(c *C) {
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defer cleanEnv(c, s.store, s.do)
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tk := testkit.NewTestKit(c, s.store)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t")
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createTable := `CREATE TABLE t (a int, b int, primary key(a), index idx(b))
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PARTITION BY RANGE ( a ) (
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PARTITION p0 VALUES LESS THAN (6),
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PARTITION p1 VALUES LESS THAN (11),
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PARTITION p2 VALUES LESS THAN (16),
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PARTITION p3 VALUES LESS THAN (21)
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)`
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tk.MustExec(createTable)
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for i := 1; i < 21; i++ {
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tk.MustExec(fmt.Sprintf(`insert into t values (%d, %d)`, i, i))
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}
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tk.MustExec("analyze table t")
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is := s.do.InfoSchema()
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h := s.do.StatsHandle()
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h.Update(is)
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table, err := is.TableByName(model.NewCIStr("test"), model.NewCIStr("t"))
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c.Assert(err, IsNil)
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tableInfo := table.Meta()
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jsonTbl, err := h.DumpStatsToJSON("test", tableInfo)
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c.Assert(err, IsNil)
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pi := tableInfo.GetPartitionInfo()
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originTables := make([]*statistics.Table, 0, len(pi.Definitions))
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for _, def := range pi.Definitions {
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originTables = append(originTables, h.GetPartitionStats(tableInfo, def.ID))
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}
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tk.MustExec("delete from mysql.stats_meta")
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tk.MustExec("delete from mysql.stats_histograms")
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tk.MustExec("delete from mysql.stats_buckets")
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h.Clear()
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err = h.LoadStatsFromJSON(s.do.InfoSchema(), jsonTbl)
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c.Assert(err, IsNil)
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for i, def := range pi.Definitions {
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t := h.GetPartitionStats(tableInfo, def.ID)
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assertTableEqual(c, originTables[i], t)
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}
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}
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func (s *testStatsSuite) TestDumpAlteredTable(c *C) {
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defer cleanEnv(c, s.store, s.do)
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tk := testkit.NewTestKit(c, s.store)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t")
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h := s.do.StatsHandle()
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oriLease := h.Lease
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h.Lease = 1
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defer func() { h.Lease = oriLease }()
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tk.MustExec("create table t(a int, b int)")
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tk.MustExec("analyze table t")
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tk.MustExec("alter table t drop column a")
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table, err := s.do.InfoSchema().TableByName(model.NewCIStr("test"), model.NewCIStr("t"))
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c.Assert(err, IsNil)
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_, err = h.DumpStatsToJSON("test", table.Meta())
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c.Assert(err, IsNil)
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}
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