1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
#include <Access/AccessControl.h>
#include <Columns/getLeastSuperColumn.h>
#include <Interpreters/Context.h>
#include <Interpreters/InterpreterSelectIntersectExceptQuery.h>
#include <Interpreters/InterpreterSelectQuery.h>
#include <Interpreters/QueryLog.h>
#include <Parsers/ASTSelectIntersectExceptQuery.h>
#include <Parsers/ASTSelectWithUnionQuery.h>
#include <Processors/QueryPlan/DistinctStep.h>
#include <Processors/QueryPlan/ExpressionStep.h>
#include <Processors/QueryPlan/IQueryPlanStep.h>
#include <Processors/QueryPlan/IntersectOrExceptStep.h>
#include <Processors/QueryPlan/LimitStep.h>
#include <Processors/QueryPlan/OffsetStep.h>
#include <Processors/QueryPlan/Optimizations/QueryPlanOptimizationSettings.h>
#include <Processors/QueryPlan/QueryPlan.h>
#include <QueryPipeline/QueryPipelineBuilder.h>
namespace DB
{
namespace ErrorCodes
{
extern const int INTERSECT_OR_EXCEPT_RESULT_STRUCTURES_MISMATCH;
extern const int LOGICAL_ERROR;
}
static Block getCommonHeader(const Blocks & headers)
{
size_t num_selects = headers.size();
Block common_header = headers.front();
size_t num_columns = common_header.columns();
for (size_t query_num = 1; query_num < num_selects; ++query_num)
{
if (headers[query_num].columns() != num_columns)
throw Exception(ErrorCodes::INTERSECT_OR_EXCEPT_RESULT_STRUCTURES_MISMATCH,
"Different number of columns in IntersectExceptQuery elements:\n {} \nand\n {}",
common_header.dumpNames(), headers[query_num].dumpNames());
}
std::vector<const ColumnWithTypeAndName *> columns(num_selects);
for (size_t column_num = 0; column_num < num_columns; ++column_num)
{
for (size_t i = 0; i < num_selects; ++i)
columns[i] = &headers[i].getByPosition(column_num);
ColumnWithTypeAndName & result_elem = common_header.getByPosition(column_num);
result_elem = getLeastSuperColumn(columns);
}
return common_header;
}
InterpreterSelectIntersectExceptQuery::InterpreterSelectIntersectExceptQuery(
const ASTPtr & query_ptr_,
ContextPtr context_,
const SelectQueryOptions & options_)
:InterpreterSelectIntersectExceptQuery(query_ptr_, Context::createCopy(context_), options_)
{
}
InterpreterSelectIntersectExceptQuery::InterpreterSelectIntersectExceptQuery(
const ASTPtr & query_ptr_,
ContextMutablePtr context_,
const SelectQueryOptions & options_)
: IInterpreterUnionOrSelectQuery(query_ptr_->clone(), context_, options_)
{
ASTSelectIntersectExceptQuery * ast = query_ptr->as<ASTSelectIntersectExceptQuery>();
final_operator = ast->final_operator;
const auto & children = ast->getListOfSelects();
size_t num_children = children.size();
/// AST must have been changed by the visitor.
if (final_operator == Operator::UNKNOWN || num_children != 2)
throw Exception(ErrorCodes::LOGICAL_ERROR,
"SelectIntersectExceptyQuery has not been normalized (number of children: {})",
num_children);
nested_interpreters.resize(num_children);
for (size_t i = 0; i < num_children; ++i)
{
nested_interpreters[i] = buildCurrentChildInterpreter(children.at(i));
uses_view_source |= nested_interpreters[i]->usesViewSource();
}
Blocks headers(num_children);
for (size_t query_num = 0; query_num < num_children; ++query_num)
headers[query_num] = nested_interpreters[query_num]->getSampleBlock();
result_header = getCommonHeader(headers);
}
std::unique_ptr<IInterpreterUnionOrSelectQuery>
InterpreterSelectIntersectExceptQuery::buildCurrentChildInterpreter(const ASTPtr & ast_ptr_)
{
if (ast_ptr_->as<ASTSelectWithUnionQuery>())
return std::make_unique<InterpreterSelectWithUnionQuery>(ast_ptr_, context, SelectQueryOptions());
if (ast_ptr_->as<ASTSelectQuery>())
return std::make_unique<InterpreterSelectQuery>(ast_ptr_, context, SelectQueryOptions());
if (ast_ptr_->as<ASTSelectIntersectExceptQuery>())
return std::make_unique<InterpreterSelectIntersectExceptQuery>(ast_ptr_, context, SelectQueryOptions());
throw Exception(ErrorCodes::LOGICAL_ERROR, "Unexpected query: {}", ast_ptr_->getID());
}
void InterpreterSelectIntersectExceptQuery::buildQueryPlan(QueryPlan & query_plan)
{
auto local_limits = getStorageLimits(*context, options);
storage_limits.emplace_back(local_limits);
for (auto & interpreter : nested_interpreters)
interpreter->addStorageLimits(storage_limits);
size_t num_plans = nested_interpreters.size();
std::vector<std::unique_ptr<QueryPlan>> plans(num_plans);
DataStreams data_streams(num_plans);
for (size_t i = 0; i < num_plans; ++i)
{
plans[i] = std::make_unique<QueryPlan>();
nested_interpreters[i]->buildQueryPlan(*plans[i]);
if (!blocksHaveEqualStructure(plans[i]->getCurrentDataStream().header, result_header))
{
auto actions_dag = ActionsDAG::makeConvertingActions(
plans[i]->getCurrentDataStream().header.getColumnsWithTypeAndName(),
result_header.getColumnsWithTypeAndName(),
ActionsDAG::MatchColumnsMode::Position);
auto converting_step = std::make_unique<ExpressionStep>(plans[i]->getCurrentDataStream(), std::move(actions_dag));
converting_step->setStepDescription("Conversion before UNION");
plans[i]->addStep(std::move(converting_step));
}
data_streams[i] = plans[i]->getCurrentDataStream();
}
const Settings & settings = context->getSettingsRef();
auto max_threads = settings.max_threads;
auto step = std::make_unique<IntersectOrExceptStep>(std::move(data_streams), final_operator, max_threads);
query_plan.unitePlans(std::move(step), std::move(plans));
const auto & query = query_ptr->as<ASTSelectIntersectExceptQuery &>();
if (query.final_operator == ASTSelectIntersectExceptQuery::Operator::INTERSECT_DISTINCT
|| query.final_operator == ASTSelectIntersectExceptQuery::Operator::EXCEPT_DISTINCT)
{
/// Add distinct transform
SizeLimits limits(settings.max_rows_in_distinct, settings.max_bytes_in_distinct, settings.distinct_overflow_mode);
auto distinct_step = std::make_unique<DistinctStep>(
query_plan.getCurrentDataStream(),
limits,
0,
result_header.getNames(),
false,
settings.optimize_distinct_in_order);
query_plan.addStep(std::move(distinct_step));
}
addAdditionalPostFilter(query_plan);
query_plan.addInterpreterContext(context);
}
BlockIO InterpreterSelectIntersectExceptQuery::execute()
{
BlockIO res;
QueryPlan query_plan;
buildQueryPlan(query_plan);
auto builder = query_plan.buildQueryPipeline(
QueryPlanOptimizationSettings::fromContext(context),
BuildQueryPipelineSettings::fromContext(context));
res.pipeline = QueryPipelineBuilder::getPipeline(std::move(*builder));
setQuota(res.pipeline);
return res;
}
void InterpreterSelectIntersectExceptQuery::ignoreWithTotals()
{
for (auto & interpreter : nested_interpreters)
interpreter->ignoreWithTotals();
}
void InterpreterSelectIntersectExceptQuery::extendQueryLogElemImpl(QueryLogElement & elem, const ASTPtr & /*ast*/, ContextPtr /*context_*/) const
{
for (const auto & interpreter : nested_interpreters)
{
if (const auto * select_interpreter = dynamic_cast<const InterpreterSelectQuery *>(interpreter.get()))
{
auto filter = select_interpreter->getRowPolicyFilter();
if (filter)
{
for (const auto & row_policy : filter->policies)
{
auto name = row_policy->getFullName().toString();
elem.used_row_policies.emplace(std::move(name));
}
}
}
}
}
}
|
