130 lines
4.2 KiB
Go
130 lines
4.2 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 executor_test
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import (
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"fmt"
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"strings"
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. "github.com/pingcap/check"
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"github.com/pingcap/parser/model"
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"github.com/pingcap/parser/mysql"
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"github.com/pingcap/tidb/executor"
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"github.com/pingcap/tidb/session"
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"github.com/pingcap/tidb/sessionctx"
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"github.com/pingcap/tidb/util/testkit"
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)
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func (s *testSuite1) TestAnalyzePartition(c *C) {
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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, c varchar(10), 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, "hello")`, i, i))
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}
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tk.MustExec("analyze table t")
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is := executor.GetInfoSchema(tk.Se.(sessionctx.Context))
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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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pi := table.Meta().GetPartitionInfo()
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c.Assert(pi, NotNil)
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do, err := session.GetDomain(s.store)
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c.Assert(err, IsNil)
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handle := do.StatsHandle()
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for _, def := range pi.Definitions {
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statsTbl := handle.GetPartitionStats(table.Meta(), def.ID)
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c.Assert(statsTbl.Pseudo, IsFalse)
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c.Assert(len(statsTbl.Columns), Equals, 3)
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c.Assert(len(statsTbl.Indices), Equals, 1)
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for _, col := range statsTbl.Columns {
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c.Assert(col.Len(), Greater, 0)
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}
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for _, idx := range statsTbl.Indices {
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c.Assert(idx.Len(), Greater, 0)
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}
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}
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tk.MustExec("drop table t")
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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, "hello")`, i, i))
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}
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tk.MustExec("alter table t analyze partition p0")
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is = executor.GetInfoSchema(tk.Se.(sessionctx.Context))
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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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pi = table.Meta().GetPartitionInfo()
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c.Assert(pi, NotNil)
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for i, def := range pi.Definitions {
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statsTbl := handle.GetPartitionStats(table.Meta(), def.ID)
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if i == 0 {
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c.Assert(statsTbl.Pseudo, IsFalse)
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c.Assert(len(statsTbl.Columns), Equals, 3)
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c.Assert(len(statsTbl.Indices), Equals, 1)
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} else {
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c.Assert(statsTbl.Pseudo, IsTrue)
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}
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}
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}
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func (s *testSuite1) TestAnalyzeParameters(c *C) {
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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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tk.MustExec("create table t(a int)")
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for i := 0; i < 20; i++ {
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tk.MustExec(fmt.Sprintf("insert into t values (%d)", i))
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}
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tk.MustExec("analyze table t")
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is := executor.GetInfoSchema(tk.Se.(sessionctx.Context))
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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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tbl := s.dom.StatsHandle().GetTableStats(tableInfo)
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c.Assert(tbl.Columns[1].Len(), Equals, 20)
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tk.MustExec("analyze table t with 4 buckets")
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tbl = s.dom.StatsHandle().GetTableStats(tableInfo)
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c.Assert(tbl.Columns[1].Len(), Equals, 4)
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}
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func (s *testSuite1) TestAnalyzeTooLongColumns(c *C) {
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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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tk.MustExec("create table t(a json)")
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value := fmt.Sprintf(`{"x":"%s"}`, strings.Repeat("x", mysql.MaxFieldVarCharLength))
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tk.MustExec(fmt.Sprintf("insert into t values ('%s')", value))
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tk.MustExec("analyze table t")
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is := executor.GetInfoSchema(tk.Se.(sessionctx.Context))
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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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tbl := s.dom.StatsHandle().GetTableStats(tableInfo)
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c.Assert(tbl.Columns[1].Len(), Equals, 0)
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c.Assert(tbl.Columns[1].TotColSize, Equals, int64(65559))
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}
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