77 lines
2.1 KiB
Go
77 lines
2.1 KiB
Go
// Copyright 2021 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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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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 aggregation
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import (
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"testing"
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"github.com/pingcap/tidb/expression"
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"github.com/pingcap/tidb/parser/ast"
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"github.com/pingcap/tidb/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/stretchr/testify/require"
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)
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func TestClone(t *testing.T) {
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ctx := mock.NewContext()
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col := &expression.Column{
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UniqueID: 0,
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RetType: types.NewFieldType(mysql.TypeLonglong),
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}
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desc, err := newBaseFuncDesc(ctx, ast.AggFuncFirstRow, []expression.Expression{col})
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require.NoError(t, err)
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cloned := desc.clone()
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require.True(t, desc.equal(ctx, cloned))
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col1 := &expression.Column{
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UniqueID: 1,
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RetType: types.NewFieldType(mysql.TypeVarchar),
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}
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cloned.Args[0] = col1
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require.Equal(t, col, desc.Args[0])
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require.False(t, desc.equal(ctx, cloned))
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}
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func TestBaseFunc_InferAggRetType(t *testing.T) {
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ctx := mock.NewContext()
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doubleType := types.NewFieldType(mysql.TypeDouble)
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bitType := types.NewFieldType(mysql.TypeBit)
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funcNames := []string{
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ast.AggFuncMax, ast.AggFuncMin,
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}
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dataTypes := []*types.FieldType{
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doubleType, bitType,
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}
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for _, dataType := range dataTypes {
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notNullType := dataType.Clone()
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notNullType.AddFlag(mysql.NotNullFlag)
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col := &expression.Column{
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UniqueID: 0,
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RetType: notNullType,
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}
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for _, name := range funcNames {
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desc, err := newBaseFuncDesc(ctx, name, []expression.Expression{col})
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require.NoError(t, err)
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err = desc.TypeInfer(ctx)
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require.NoError(t, err)
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require.Equal(t, dataType, desc.RetTp)
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}
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}
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}
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