149b8184a6
Scheme info is generated when converting the initial logical plan tree to Group, so in exploration phase, we need to fill in the schema of newly built Group; stats info is generated in lazy style when it is needed during implementation phase.
96 lines
2.7 KiB
Go
96 lines
2.7 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 cascades
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import (
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"math"
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"testing"
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. "github.com/pingcap/check"
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"github.com/pingcap/parser"
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"github.com/pingcap/parser/model"
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"github.com/pingcap/tidb/infoschema"
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plannercore "github.com/pingcap/tidb/planner/core"
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"github.com/pingcap/tidb/planner/property"
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"github.com/pingcap/tidb/sessionctx"
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"github.com/pingcap/tidb/util/testleak"
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)
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func TestT(t *testing.T) {
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CustomVerboseFlag = true
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TestingT(t)
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}
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var _ = Suite(&testCascadesSuite{})
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type testCascadesSuite struct {
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*parser.Parser
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is infoschema.InfoSchema
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sctx sessionctx.Context
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}
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func (s *testCascadesSuite) SetUpSuite(c *C) {
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testleak.BeforeTest()
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s.is = infoschema.MockInfoSchema([]*model.TableInfo{plannercore.MockTable()})
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s.sctx = plannercore.MockContext()
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s.Parser = parser.New()
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}
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func (s *testCascadesSuite) TearDownSuite(c *C) {
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testleak.AfterTest(c)()
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}
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func (s *testCascadesSuite) TestImplGroupZeroCost(c *C) {
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stmt, err := s.ParseOneStmt("select t1.a, t2.a from t as t1 left join t as t2 on t1.a = t2.a where t1.a < 1.0", "", "")
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c.Assert(err, IsNil)
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p, err := plannercore.BuildLogicalPlan(s.sctx, stmt, s.is)
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c.Assert(err, IsNil)
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logic, ok := p.(plannercore.LogicalPlan)
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c.Assert(ok, IsTrue)
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rootGroup := convert2Group(logic)
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prop := &property.PhysicalProperty{
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ExpectedCnt: math.MaxFloat64,
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}
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impl, err := implGroup(rootGroup, prop, 0.0)
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c.Assert(impl, IsNil)
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c.Assert(err, IsNil)
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}
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func (s *testCascadesSuite) TestInitGroupSchema(c *C) {
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stmt, err := s.ParseOneStmt("select a from t", "", "")
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c.Assert(err, IsNil)
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p, err := plannercore.BuildLogicalPlan(s.sctx, stmt, s.is)
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c.Assert(err, IsNil)
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logic, ok := p.(plannercore.LogicalPlan)
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c.Assert(ok, IsTrue)
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g := convert2Group(logic)
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c.Assert(g, NotNil)
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c.Assert(g.Prop, NotNil)
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c.Assert(g.Prop.Schema.Len(), Equals, 1)
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c.Assert(g.Prop.Stats, IsNil)
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}
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func (s *testCascadesSuite) TestFillGroupStats(c *C) {
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stmt, err := s.ParseOneStmt("select * from t t1 join t t2 on t1.a = t2.a", "", "")
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c.Assert(err, IsNil)
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p, err := plannercore.BuildLogicalPlan(s.sctx, stmt, s.is)
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c.Assert(err, IsNil)
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logic, ok := p.(plannercore.LogicalPlan)
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c.Assert(ok, IsTrue)
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rootGroup := convert2Group(logic)
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err = fillGroupStats(rootGroup)
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c.Assert(err, IsNil)
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c.Assert(rootGroup.Prop.Stats, NotNil)
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}
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