1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "args_table.h"
17
18 namespace SysTuning {
19 namespace TraceStreamer {
20 enum Index { ID = 0, KEY, DATATYPE, VALUE, ARGSETID };
ArgsTable(const TraceDataCache * dataCache)21 ArgsTable::ArgsTable(const TraceDataCache* dataCache) : TableBase(dataCache)
22 {
23 tableColumn_.push_back(TableBase::ColumnInfo("id", "INTEGER"));
24 tableColumn_.push_back(TableBase::ColumnInfo("key", "INTEGER"));
25 tableColumn_.push_back(TableBase::ColumnInfo("datatype", "INTEGER"));
26 tableColumn_.push_back(TableBase::ColumnInfo("value", "INTEGER"));
27 tableColumn_.push_back(TableBase::ColumnInfo("argset", "INTEGER"));
28 tablePriKey_.push_back("id");
29 }
30
~ArgsTable()31 ArgsTable::~ArgsTable() {}
32
EstimateFilterCost(FilterConstraints & fc,EstimatedIndexInfo & ei)33 void ArgsTable::EstimateFilterCost(FilterConstraints& fc, EstimatedIndexInfo& ei)
34 {
35 constexpr double filterBaseCost = 1000.0; // set-up and tear-down
36 constexpr double indexCost = 2.0;
37 ei.estimatedCost = filterBaseCost;
38
39 auto rowCount = dataCache_->GetConstArgSetData().Size();
40 if (rowCount == 0 || rowCount == 1) {
41 ei.estimatedRows = rowCount;
42 ei.estimatedCost += indexCost * rowCount;
43 return;
44 }
45
46 double filterCost = 0.0;
47 auto constraints = fc.GetConstraints();
48 if (constraints.empty()) { // scan all rows
49 filterCost = rowCount;
50 } else {
51 FilterByConstraint(fc, filterCost, rowCount);
52 }
53 ei.estimatedCost += filterCost;
54 ei.estimatedRows = rowCount;
55 ei.estimatedCost += rowCount * indexCost;
56
57 ei.isOrdered = true;
58 auto orderbys = fc.GetOrderBys();
59 for (auto i = 0; i < orderbys.size(); i++) {
60 switch (orderbys[i].iColumn) {
61 case ID:
62 break;
63 default: // other columns can be sorted by SQLite
64 ei.isOrdered = false;
65 break;
66 }
67 }
68 }
69
FilterByConstraint(FilterConstraints & fc,double & filterCost,size_t rowCount)70 void ArgsTable::FilterByConstraint(FilterConstraints& fc, double& filterCost, size_t rowCount)
71 {
72 auto fcConstraints = fc.GetConstraints();
73 for (int32_t i = 0; i < static_cast<int32_t>(fcConstraints.size()); i++) {
74 if (rowCount <= 1) {
75 // only one row or nothing, needn't filter by constraint
76 filterCost += rowCount;
77 break;
78 }
79 const auto& c = fcConstraints[i];
80 switch (c.col) {
81 case ID: {
82 if (CanFilterId(c.op, rowCount)) {
83 fc.UpdateConstraint(i, true);
84 filterCost += 1; // id can position by 1 step
85 } else {
86 filterCost += rowCount; // scan all rows
87 }
88 break;
89 }
90 default: // other column
91 filterCost += rowCount; // scan all rows
92 break;
93 }
94 }
95 }
96
CreateCursor()97 std::unique_ptr<TableBase::Cursor> ArgsTable::CreateCursor()
98 {
99 return std::make_unique<Cursor>(dataCache_, this);
100 }
101
Cursor(const TraceDataCache * dataCache,TableBase * table)102 ArgsTable::Cursor::Cursor(const TraceDataCache* dataCache, TableBase* table)
103 : TableBase::Cursor(dataCache, table, static_cast<uint32_t>(dataCache->GetConstArgSetData().Size())),
104 argSet_(dataCache->GetConstArgSetData())
105 {
106 }
107
~Cursor()108 ArgsTable::Cursor::~Cursor() {}
109
Filter(const FilterConstraints & fc,sqlite3_value ** argv)110 int32_t ArgsTable::Cursor::Filter(const FilterConstraints& fc, sqlite3_value** argv)
111 {
112 // reset indexMap_
113 indexMap_ = std::make_unique<IndexMap>(0, rowCount_);
114
115 if (rowCount_ <= 0) {
116 return SQLITE_OK;
117 }
118
119 auto& cs = fc.GetConstraints();
120 for (size_t i = 0; i < cs.size(); i++) {
121 const auto& c = cs[i];
122 switch (c.col) {
123 case ID:
124 FilterId(c.op, argv[i]);
125 break;
126 default:
127 break;
128 }
129 }
130
131 auto orderbys = fc.GetOrderBys();
132 for (auto i = orderbys.size(); i > 0;) {
133 i--;
134 switch (orderbys[i].iColumn) {
135 case ID:
136 indexMap_->SortBy(orderbys[i].desc);
137 break;
138 default:
139 break;
140 }
141 }
142
143 return SQLITE_OK;
144 }
145
Column(int32_t col) const146 int32_t ArgsTable::Cursor::Column(int32_t col) const
147 {
148 switch (col) {
149 case ID:
150 sqlite3_result_int64(context_, CurrentRow()); // IdsData() will be optimized
151 break;
152 case KEY:
153 sqlite3_result_int64(context_, static_cast<int64_t>(argSet_.NamesData()[CurrentRow()]));
154 break;
155 case DATATYPE:
156 sqlite3_result_int64(context_, static_cast<int64_t>(argSet_.DataTypes()[CurrentRow()]));
157 break;
158 case VALUE:
159 sqlite3_result_int64(context_, static_cast<int64_t>(argSet_.ValuesData()[CurrentRow()]));
160 break;
161 case ARGSETID:
162 sqlite3_result_int64(context_, static_cast<int64_t>(argSet_.ArgsData()[CurrentRow()]));
163 break;
164 default:
165 TS_LOGF("Unregistered column : %d", col);
166 break;
167 }
168 return SQLITE_OK;
169 }
170 } // namespace TraceStreamer
171 } // namespace SysTuning
172