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225 lines
7.2 KiB
225 lines
7.2 KiB
// Copyright 2017 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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"time"
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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/model"
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"github.com/pingcap/parser/mysql"
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"github.com/pingcap/tidb/sessionctx/stmtctx"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util/chunk"
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"github.com/pingcap/tidb/util/mock"
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)
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func (s *testEvaluatorSuite) TestNewValuesFunc(c *C) {
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res := NewValuesFunc(s.ctx, 0, types.NewFieldType(mysql.TypeLonglong))
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c.Assert(res.FuncName.O, Equals, "values")
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c.Assert(res.RetType.Tp, Equals, mysql.TypeLonglong)
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_, ok := res.Function.(*builtinValuesIntSig)
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c.Assert(ok, IsTrue)
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}
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func (s *testEvaluatorSuite) TestEvaluateExprWithNull(c *C) {
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tblInfo := newTestTableBuilder("").add("col0", mysql.TypeLonglong).add("col1", mysql.TypeLonglong).build()
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schema := tableInfoToSchemaForTest(tblInfo)
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col0 := schema.Columns[0]
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col1 := schema.Columns[1]
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schema.Columns = schema.Columns[:1]
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innerIfNull, err := newFunctionForTest(s.ctx, ast.Ifnull, col1, NewOne())
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c.Assert(err, IsNil)
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outerIfNull, err := newFunctionForTest(s.ctx, ast.Ifnull, col0, innerIfNull)
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c.Assert(err, IsNil)
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res := EvaluateExprWithNull(s.ctx, schema, outerIfNull)
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c.Assert(res.String(), Equals, "ifnull(Column#1, 1)")
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schema.Columns = append(schema.Columns, col1)
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// ifnull(null, ifnull(null, 1))
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res = EvaluateExprWithNull(s.ctx, schema, outerIfNull)
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c.Assert(res.Equal(s.ctx, NewOne()), IsTrue)
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}
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func (s *testEvaluatorSuite) TestConstant(c *C) {
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sc := &stmtctx.StatementContext{TimeZone: time.Local}
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c.Assert(NewZero().IsCorrelated(), IsFalse)
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c.Assert(NewZero().ConstItem(sc), IsTrue)
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c.Assert(NewZero().Decorrelate(nil).Equal(s.ctx, NewZero()), IsTrue)
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c.Assert(NewZero().HashCode(sc), DeepEquals, []byte{0x0, 0x8, 0x0})
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c.Assert(NewZero().Equal(s.ctx, NewOne()), IsFalse)
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res, err := NewZero().MarshalJSON()
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c.Assert(err, IsNil)
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c.Assert(res, DeepEquals, []byte{0x22, 0x30, 0x22})
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}
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func (s *testEvaluatorSuite) TestIsBinaryLiteral(c *C) {
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col := &Column{RetType: types.NewFieldType(mysql.TypeEnum)}
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c.Assert(IsBinaryLiteral(col), IsFalse)
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col.RetType.Tp = mysql.TypeSet
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c.Assert(IsBinaryLiteral(col), IsFalse)
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col.RetType.Tp = mysql.TypeBit
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c.Assert(IsBinaryLiteral(col), IsFalse)
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col.RetType.Tp = mysql.TypeDuration
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c.Assert(IsBinaryLiteral(col), IsFalse)
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con := &Constant{RetType: types.NewFieldType(mysql.TypeVarString), Value: types.NewBinaryLiteralDatum([]byte{byte(0), byte(1)})}
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c.Assert(IsBinaryLiteral(con), IsTrue)
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con.Value = types.NewIntDatum(1)
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c.Assert(IsBinaryLiteral(con), IsFalse)
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}
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func (s *testEvaluatorSuite) TestConstItem(c *C) {
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sf := newFunction(ast.Rand)
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c.Assert(sf.ConstItem(s.ctx.GetSessionVars().StmtCtx), Equals, false)
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sf = newFunction(ast.UUID)
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c.Assert(sf.ConstItem(s.ctx.GetSessionVars().StmtCtx), Equals, false)
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sf = newFunction(ast.GetParam, NewOne())
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c.Assert(sf.ConstItem(s.ctx.GetSessionVars().StmtCtx), Equals, false)
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sf = newFunction(ast.Abs, NewOne())
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c.Assert(sf.ConstItem(s.ctx.GetSessionVars().StmtCtx), Equals, true)
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}
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func (s *testEvaluatorSuite) TestVectorizable(c *C) {
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exprs := make([]Expression, 0, 4)
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sf := newFunction(ast.Rand)
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column := &Column{
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UniqueID: 0,
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RetType: types.NewFieldType(mysql.TypeLonglong),
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}
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exprs = append(exprs, sf)
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exprs = append(exprs, NewOne())
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exprs = append(exprs, NewNull())
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exprs = append(exprs, column)
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c.Assert(Vectorizable(exprs), Equals, true)
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column0 := &Column{
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UniqueID: 1,
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RetType: types.NewFieldType(mysql.TypeString),
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}
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column1 := &Column{
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UniqueID: 2,
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RetType: types.NewFieldType(mysql.TypeString),
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}
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column2 := &Column{
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UniqueID: 3,
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RetType: types.NewFieldType(mysql.TypeLonglong),
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}
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exprs = exprs[:0]
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sf = newFunction(ast.SetVar, column0, column1)
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exprs = append(exprs, sf)
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c.Assert(Vectorizable(exprs), Equals, false)
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exprs = exprs[:0]
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sf = newFunction(ast.GetVar, column0)
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exprs = append(exprs, sf)
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c.Assert(Vectorizable(exprs), Equals, false)
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exprs = exprs[:0]
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sf = newFunction(ast.NextVal, column0)
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exprs = append(exprs, sf)
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sf = newFunction(ast.LastVal, column0)
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exprs = append(exprs, sf)
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sf = newFunction(ast.SetVal, column1, column2)
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exprs = append(exprs, sf)
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c.Assert(Vectorizable(exprs), Equals, false)
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}
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type testTableBuilder struct {
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tableName string
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columnNames []string
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tps []byte
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}
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func newTestTableBuilder(tableName string) *testTableBuilder {
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return &testTableBuilder{tableName: tableName}
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}
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func (builder *testTableBuilder) add(name string, tp byte) *testTableBuilder {
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builder.columnNames = append(builder.columnNames, name)
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builder.tps = append(builder.tps, tp)
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return builder
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}
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func (builder *testTableBuilder) build() *model.TableInfo {
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ti := &model.TableInfo{
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ID: 1,
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Name: model.NewCIStr(builder.tableName),
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State: model.StatePublic,
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}
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for i, colName := range builder.columnNames {
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tp := builder.tps[i]
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fieldType := types.NewFieldType(tp)
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fieldType.Flen, fieldType.Decimal = mysql.GetDefaultFieldLengthAndDecimal(tp)
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fieldType.Charset, fieldType.Collate = types.DefaultCharsetForType(tp)
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ti.Columns = append(ti.Columns, &model.ColumnInfo{
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ID: int64(i + 1),
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Name: model.NewCIStr(colName),
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Offset: i,
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FieldType: *fieldType,
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State: model.StatePublic,
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})
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}
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return ti
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}
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func tableInfoToSchemaForTest(tableInfo *model.TableInfo) *Schema {
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columns := tableInfo.Columns
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schema := NewSchema(make([]*Column, 0, len(columns))...)
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for i, col := range columns {
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schema.Append(&Column{
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UniqueID: int64(i),
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ID: col.ID,
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RetType: &col.FieldType,
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})
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}
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return schema
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}
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func (s *testEvaluatorSuite) TestEvalExpr(c *C) {
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ctx := mock.NewContext()
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eTypes := []types.EvalType{types.ETInt, types.ETReal, types.ETDecimal, types.ETString, types.ETTimestamp, types.ETDatetime, types.ETDuration}
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tNames := []string{"int", "real", "decimal", "string", "timestamp", "datetime", "duration"}
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for i := 0; i < len(tNames); i++ {
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ft := eType2FieldType(eTypes[i])
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colExpr := &Column{Index: 0, RetType: ft}
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input := chunk.New([]*types.FieldType{ft}, 1024, 1024)
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fillColumnWithGener(eTypes[i], input, 0, nil)
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colBuf := chunk.NewColumn(ft, 1024)
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colBuf2 := chunk.NewColumn(ft, 1024)
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var err error
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c.Assert(colExpr.Vectorized(), IsTrue)
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ctx.GetSessionVars().EnableVectorizedExpression = false
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err = EvalExpr(ctx, colExpr, colExpr.GetType().EvalType(), input, colBuf)
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if err != nil {
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c.Fatal(err)
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}
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ctx.GetSessionVars().EnableVectorizedExpression = true
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err = EvalExpr(ctx, colExpr, colExpr.GetType().EvalType(), input, colBuf2)
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if err != nil {
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c.Fatal(err)
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}
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for j := 0; j < 1024; j++ {
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isNull := colBuf.IsNull(j)
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isNull2 := colBuf2.IsNull(j)
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c.Assert(isNull, Equals, isNull2)
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if isNull {
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continue
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}
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c.Assert(string(colBuf.GetRaw(j)), Equals, string(colBuf2.GetRaw(j)))
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}
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}
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}
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