blob: c85b863a20377168e7be4b65e09d647b47e9972a (
plain) (
blame)
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
|
#include <Analyzer/Passes/NormalizeCountVariantsPass.h>
#include <AggregateFunctions/AggregateFunctionFactory.h>
#include <AggregateFunctions/IAggregateFunction.h>
#include <Analyzer/InDepthQueryTreeVisitor.h>
#include <Analyzer/ConstantNode.h>
#include <Analyzer/FunctionNode.h>
#include <Interpreters/Context.h>
namespace DB
{
namespace
{
class NormalizeCountVariantsVisitor : public InDepthQueryTreeVisitorWithContext<NormalizeCountVariantsVisitor>
{
public:
using Base = InDepthQueryTreeVisitorWithContext<NormalizeCountVariantsVisitor>;
using Base::Base;
void enterImpl(QueryTreeNodePtr & node)
{
if (!getSettings().optimize_normalize_count_variants)
return;
auto * function_node = node->as<FunctionNode>();
if (!function_node || !function_node->isAggregateFunction() || (function_node->getFunctionName() != "count" && function_node->getFunctionName() != "sum"))
return;
if (function_node->getArguments().getNodes().size() != 1)
return;
auto & first_argument = function_node->getArguments().getNodes()[0];
auto * first_argument_constant_node = first_argument->as<ConstantNode>();
if (!first_argument_constant_node)
return;
const auto & first_argument_constant_literal = first_argument_constant_node->getValue();
if (function_node->getFunctionName() == "count" && !first_argument_constant_literal.isNull())
{
resolveAsCountAggregateFunction(*function_node);
function_node->getArguments().getNodes().clear();
}
else if (function_node->getFunctionName() == "sum" &&
first_argument_constant_literal.getType() == Field::Types::UInt64 &&
first_argument_constant_literal.get<UInt64>() == 1)
{
resolveAsCountAggregateFunction(*function_node);
function_node->getArguments().getNodes().clear();
}
}
private:
static inline void resolveAsCountAggregateFunction(FunctionNode & function_node)
{
AggregateFunctionProperties properties;
auto aggregate_function = AggregateFunctionFactory::instance().get("count", {}, {}, properties);
function_node.resolveAsAggregateFunction(std::move(aggregate_function));
}
};
}
void NormalizeCountVariantsPass::run(QueryTreeNodePtr query_tree_node, ContextPtr context)
{
NormalizeCountVariantsVisitor visitor(context);
visitor.visit(query_tree_node);
}
}
|
