92 lines
3.0 KiB
Go
92 lines
3.0 KiB
Go
// Copyright 2023 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 testutil
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import (
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"github.com/pingcap/tidb/pkg/parser/model"
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"github.com/pingcap/tidb/pkg/parser/mysql"
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"github.com/pingcap/tidb/pkg/statistics"
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"github.com/pingcap/tidb/pkg/types"
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)
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// NewMockStatisticsTable creates a mock statistics table with given columns and indices.
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// each column and index consumes 4 bytes memory
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func NewMockStatisticsTable(columns int, indices int, withCMS, withTopN, withHist bool) *statistics.Table {
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t := &statistics.Table{}
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t.Columns = make(map[int64]*statistics.Column)
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t.Indices = make(map[int64]*statistics.Index)
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for i := 1; i <= columns; i++ {
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t.Columns[int64(i)] = &statistics.Column{
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Info: &model.ColumnInfo{ID: int64(i)},
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StatsLoadedStatus: statistics.NewStatsFullLoadStatus(),
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}
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if withCMS {
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t.Columns[int64(i)].CMSketch = statistics.NewCMSketch(1, 1)
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}
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if withTopN {
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t.Columns[int64(i)].TopN = statistics.NewTopN(1)
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t.Columns[int64(i)].TopN.AppendTopN([]byte{}, 1)
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}
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if withHist {
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t.Columns[int64(i)].Histogram = *statistics.NewHistogram(0, 10, 0, 0, types.NewFieldType(mysql.TypeBlob), 1, 0)
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}
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}
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for i := 1; i <= indices; i++ {
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t.Indices[int64(i)] = &statistics.Index{
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Info: &model.IndexInfo{ID: int64(i)},
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StatsLoadedStatus: statistics.NewStatsFullLoadStatus(),
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}
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if withCMS {
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t.Indices[int64(i)].CMSketch = statistics.NewCMSketch(1, 1)
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}
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if withTopN {
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t.Indices[int64(i)].TopN = statistics.NewTopN(1)
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t.Indices[int64(i)].TopN.AppendTopN([]byte{}, 1)
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}
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if withHist {
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t.Indices[int64(i)].Histogram = *statistics.NewHistogram(0, 10, 0, 0, types.NewFieldType(mysql.TypeBlob), 1, 0)
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}
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}
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return t
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}
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// MockTableAppendColumn appends a column to the table.
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func MockTableAppendColumn(t *statistics.Table) {
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index := int64(len(t.Columns) + 1)
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t.Columns[index] = &statistics.Column{
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Info: &model.ColumnInfo{ID: index},
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CMSketch: statistics.NewCMSketch(1, 1),
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}
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}
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// MockTableAppendIndex appends an index to the table.
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func MockTableAppendIndex(t *statistics.Table) {
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index := int64(len(t.Indices) + 1)
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t.Indices[index] = &statistics.Index{
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Info: &model.IndexInfo{ID: index},
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CMSketch: statistics.NewCMSketch(1, 1),
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}
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}
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// MockTableRemoveColumn removes the last column of the table.
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func MockTableRemoveColumn(t *statistics.Table) {
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delete(t.Columns, int64(len(t.Columns)))
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}
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// MockTableRemoveIndex removes the last index of the table.
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func MockTableRemoveIndex(t *statistics.Table) {
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delete(t.Indices, int64(len(t.Indices)))
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}
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