127 lines
4.1 KiB
Go
127 lines
4.1 KiB
Go
// Copyright 2015 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 expression
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import (
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"testing"
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"github.com/pingcap/check"
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"github.com/pingcap/parser/ast"
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"github.com/pingcap/parser/mysql"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util/mock"
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"github.com/pingcap/tidb/util/testleak"
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)
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var _ = check.Suite(&testUtilSuite{})
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type testUtilSuite struct {
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}
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func (s *testUtilSuite) TestSubstituteCorCol2Constant(c *check.C) {
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defer testleak.AfterTest(c)()
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ctx := mock.NewContext()
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corCol1 := &CorrelatedColumn{Data: &One.Value}
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corCol1.RetType = types.NewFieldType(mysql.TypeLonglong)
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corCol2 := &CorrelatedColumn{Data: &One.Value}
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corCol2.RetType = types.NewFieldType(mysql.TypeLonglong)
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cast := BuildCastFunction(ctx, corCol1, types.NewFieldType(mysql.TypeLonglong))
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plus := newFunction(ast.Plus, cast, corCol2)
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plus2 := newFunction(ast.Plus, plus, One)
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ans1 := &Constant{Value: types.NewIntDatum(3), RetType: types.NewFieldType(mysql.TypeLonglong)}
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ret, err := SubstituteCorCol2Constant(plus2)
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c.Assert(err, check.IsNil)
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c.Assert(ret.Equal(ctx, ans1), check.IsTrue)
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col1 := &Column{Index: 1, RetType: types.NewFieldType(mysql.TypeLonglong)}
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ret, err = SubstituteCorCol2Constant(col1)
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c.Assert(err, check.IsNil)
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ans2 := col1
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c.Assert(ret.Equal(ctx, ans2), check.IsTrue)
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plus3 := newFunction(ast.Plus, plus2, col1)
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ret, err = SubstituteCorCol2Constant(plus3)
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c.Assert(err, check.IsNil)
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ans3 := newFunction(ast.Plus, ans1, col1)
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c.Assert(ret.Equal(ctx, ans3), check.IsTrue)
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}
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func (s *testUtilSuite) TestPushDownNot(c *check.C) {
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defer testleak.AfterTest(c)()
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ctx := mock.NewContext()
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col := &Column{Index: 1, RetType: types.NewFieldType(mysql.TypeLonglong)}
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// !((a=1||a=1)&&a=1)
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eqFunc := newFunction(ast.EQ, col, One)
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orFunc := newFunction(ast.LogicOr, eqFunc, eqFunc)
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andFunc := newFunction(ast.LogicAnd, orFunc, eqFunc)
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notFunc := newFunction(ast.UnaryNot, andFunc)
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// (a!=1&&a!=1)||a=1
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neFunc := newFunction(ast.NE, col, One)
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andFunc2 := newFunction(ast.LogicAnd, neFunc, neFunc)
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orFunc2 := newFunction(ast.LogicOr, andFunc2, neFunc)
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ret := PushDownNot(ctx, notFunc, false)
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c.Assert(ret.Equal(ctx, orFunc2), check.IsTrue)
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}
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func (s *testUtilSuite) TestFilter(c *check.C) {
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conditions := []Expression{
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newFunction(ast.EQ, newColumn(0), newColumn(1)),
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newFunction(ast.EQ, newColumn(1), newColumn(2)),
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newFunction(ast.LogicOr, newLonglong(1), newColumn(0)),
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}
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result := make([]Expression, 0, 5)
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result = Filter(result, conditions, isLogicOrFunction)
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c.Assert(result, check.HasLen, 1)
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}
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func isLogicOrFunction(e Expression) bool {
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if f, ok := e.(*ScalarFunction); ok {
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return f.FuncName.L == ast.LogicOr
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}
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return false
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}
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func BenchmarkExtractColumns(b *testing.B) {
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conditions := []Expression{
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newFunction(ast.EQ, newColumn(0), newColumn(1)),
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newFunction(ast.EQ, newColumn(1), newColumn(2)),
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newFunction(ast.EQ, newColumn(2), newColumn(3)),
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newFunction(ast.EQ, newColumn(3), newLonglong(1)),
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newFunction(ast.LogicOr, newLonglong(1), newColumn(0)),
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}
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expr := ComposeCNFCondition(mock.NewContext(), conditions...)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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ExtractColumns(expr)
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}
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b.ReportAllocs()
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}
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func BenchmarkExprFromSchema(b *testing.B) {
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conditions := []Expression{
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newFunction(ast.EQ, newColumn(0), newColumn(1)),
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newFunction(ast.EQ, newColumn(1), newColumn(2)),
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newFunction(ast.EQ, newColumn(2), newColumn(3)),
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newFunction(ast.EQ, newColumn(3), newLonglong(1)),
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newFunction(ast.LogicOr, newLonglong(1), newColumn(0)),
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}
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expr := ComposeCNFCondition(mock.NewContext(), conditions...)
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schema := &Schema{Columns: ExtractColumns(expr)}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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ExprFromSchema(expr, schema)
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}
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b.ReportAllocs()
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}
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