124 lines
3.7 KiB
Go
124 lines
3.7 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 util_test
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import (
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"testing"
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"github.com/pingcap/tidb/pkg/domain"
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"github.com/pingcap/tidb/pkg/meta/model"
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"github.com/pingcap/tidb/pkg/planner/util"
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"github.com/pingcap/tidb/pkg/planner/util/coretestsdk"
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"github.com/pingcap/tidb/pkg/types"
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"github.com/pingcap/tidb/pkg/util/collate"
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"github.com/pingcap/tidb/pkg/util/ranger"
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"github.com/stretchr/testify/require"
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)
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func TestCompareCol2Len(t *testing.T) {
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tests := []struct {
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c1 util.Col2Len
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c2 util.Col2Len
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res int
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comparable bool
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}{
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{
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c1: util.Col2Len{1: -1, 2: -1, 3: -1},
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c2: util.Col2Len{1: -1, 2: 10},
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res: 1,
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comparable: true,
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},
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{
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c1: util.Col2Len{1: 5},
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c2: util.Col2Len{1: 10, 2: -1},
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res: -1,
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comparable: true,
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},
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{
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c1: util.Col2Len{1: -1, 2: -1},
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c2: util.Col2Len{1: -1, 2: 5, 3: -1},
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res: -1,
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comparable: false,
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},
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{
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c1: util.Col2Len{1: -1, 2: 10},
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c2: util.Col2Len{1: -1, 2: 5, 3: -1},
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res: -1,
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comparable: false,
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},
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{
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c1: util.Col2Len{1: -1, 2: 10},
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c2: util.Col2Len{1: -1, 2: 10},
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res: 0,
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comparable: true,
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},
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{
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c1: util.Col2Len{1: -1, 2: -1},
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c2: util.Col2Len{1: -1, 2: 10},
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res: -1,
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comparable: false,
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},
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}
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for _, tt := range tests {
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res, comparable1 := util.CompareCol2Len(tt.c1, tt.c2)
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require.Equal(t, tt.res, res)
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require.Equal(t, tt.comparable, comparable1)
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}
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}
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func TestOnlyPointRange(t *testing.T) {
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sctx := coretestsdk.MockContext()
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defer func() {
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do := domain.GetDomain(sctx)
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do.StatsHandle().Close()
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}()
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nullDatum := types.MinNotNullDatum()
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nullDatum.SetNull()
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nullPointRange := ranger.Range{
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LowVal: []types.Datum{*nullDatum.Clone()},
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HighVal: []types.Datum{*nullDatum.Clone()},
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Collators: collate.GetBinaryCollatorSlice(1),
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}
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onePointRange := ranger.Range{
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LowVal: []types.Datum{types.NewIntDatum(1)},
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HighVal: []types.Datum{types.NewIntDatum(1)},
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Collators: collate.GetBinaryCollatorSlice(1),
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}
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one2TwoRange := ranger.Range{
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LowVal: []types.Datum{types.NewIntDatum(1)},
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HighVal: []types.Datum{types.NewIntDatum(2)},
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Collators: collate.GetBinaryCollatorSlice(1),
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}
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tc := sctx.GetSessionVars().StmtCtx.TypeCtx()
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intHandlePath := &util.AccessPath{IsIntHandlePath: true}
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intHandlePath.Ranges = []*ranger.Range{&nullPointRange, &onePointRange}
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require.True(t, intHandlePath.OnlyPointRange(tc))
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intHandlePath.Ranges = []*ranger.Range{&onePointRange, &one2TwoRange}
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require.False(t, intHandlePath.OnlyPointRange(tc))
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indexPath := &util.AccessPath{Index: &model.IndexInfo{Columns: make([]*model.IndexColumn, 1)}}
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indexPath.Ranges = []*ranger.Range{&onePointRange}
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require.True(t, indexPath.OnlyPointRange(tc))
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indexPath.Ranges = []*ranger.Range{&nullPointRange, &onePointRange}
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require.False(t, indexPath.OnlyPointRange(tc))
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indexPath.Ranges = []*ranger.Range{&onePointRange, &one2TwoRange}
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require.False(t, indexPath.OnlyPointRange(tc))
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indexPath.Index.Columns = make([]*model.IndexColumn, 2)
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indexPath.Ranges = []*ranger.Range{&onePointRange}
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require.False(t, indexPath.OnlyPointRange(tc))
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}
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