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#include <Analyzer/Passes/SumIfToCountIfPass.h>
#include <DataTypes/DataTypesNumber.h>
#include <DataTypes/DataTypeNullable.h>
#include <AggregateFunctions/AggregateFunctionFactory.h>
#include <AggregateFunctions/IAggregateFunction.h>
#include <Functions/FunctionFactory.h>
#include <Interpreters/Context.h>
#include <Analyzer/InDepthQueryTreeVisitor.h>
#include <Analyzer/ConstantNode.h>
#include <Analyzer/FunctionNode.h>
namespace DB
{
namespace
{
class SumIfToCountIfVisitor : public InDepthQueryTreeVisitorWithContext<SumIfToCountIfVisitor>
{
public:
using Base = InDepthQueryTreeVisitorWithContext<SumIfToCountIfVisitor>;
using Base::Base;
void enterImpl(QueryTreeNodePtr & node)
{
if (!getSettings().optimize_rewrite_sum_if_to_count_if)
return;
auto * function_node = node->as<FunctionNode>();
if (!function_node || !function_node->isAggregateFunction())
return;
auto function_name = function_node->getFunctionName();
auto lower_function_name = Poco::toLower(function_name);
/// sumIf, SumIf or sUMIf are valid function names, but sumIF or sumiF are not
if (lower_function_name != "sum" && (lower_function_name != "sumif" || !function_name.ends_with("If")))
return;
auto & function_node_arguments_nodes = function_node->getArguments().getNodes();
/// Rewrite `sumIf(1, cond)` into `countIf(cond)`
if (lower_function_name == "sumif")
{
if (function_node_arguments_nodes.size() != 2)
return;
const auto * constant_node = function_node_arguments_nodes[0]->as<ConstantNode>();
if (!constant_node)
return;
const auto & constant_value_literal = constant_node->getValue();
if (!isInt64OrUInt64FieldType(constant_value_literal.getType()))
return;
if (getSettings().aggregate_functions_null_for_empty)
return;
/// Rewrite `sumIf(1, cond)` into `countIf(cond)`
auto multiplier_node = function_node_arguments_nodes[0];
function_node_arguments_nodes[0] = std::move(function_node_arguments_nodes[1]);
function_node_arguments_nodes.resize(1);
resolveAsCountIfAggregateFunction(*function_node, function_node_arguments_nodes[0]->getResultType());
if (constant_value_literal.get<UInt64>() != 1)
{
/// Rewrite `sumIf(123, cond)` into `123 * countIf(cond)`
node = getMultiplyFunction(std::move(multiplier_node), node);
}
return;
}
/** Rewrite `sum(if(cond, 1, 0))` into `countIf(cond)`.
* Rewrite `sum(if(cond, 0, 1))` into `countIf(not(cond))`.
*/
if (function_node_arguments_nodes.size() != 1)
return;
auto & nested_argument = function_node_arguments_nodes[0];
auto * nested_function = nested_argument->as<FunctionNode>();
if (!nested_function || nested_function->getFunctionName() != "if")
return;
const auto nested_if_function_arguments_nodes = nested_function->getArguments().getNodes();
if (nested_if_function_arguments_nodes.size() != 3)
return;
const auto & cond_argument = nested_if_function_arguments_nodes[0];
const auto * if_true_condition_constant_node = nested_if_function_arguments_nodes[1]->as<ConstantNode>();
const auto * if_false_condition_constant_node = nested_if_function_arguments_nodes[2]->as<ConstantNode>();
if (!if_true_condition_constant_node || !if_false_condition_constant_node)
return;
const auto & if_true_condition_constant_value_literal = if_true_condition_constant_node->getValue();
const auto & if_false_condition_constant_value_literal = if_false_condition_constant_node->getValue();
if (!isInt64OrUInt64FieldType(if_true_condition_constant_value_literal.getType()) ||
!isInt64OrUInt64FieldType(if_false_condition_constant_value_literal.getType()))
return;
auto if_true_condition_value = if_true_condition_constant_value_literal.get<UInt64>();
auto if_false_condition_value = if_false_condition_constant_value_literal.get<UInt64>();
if (if_false_condition_value == 0)
{
/// Rewrite `sum(if(cond, 1, 0))` into `countIf(cond)`.
function_node_arguments_nodes[0] = nested_if_function_arguments_nodes[0];
function_node_arguments_nodes.resize(1);
resolveAsCountIfAggregateFunction(*function_node, function_node_arguments_nodes[0]->getResultType());
if (if_true_condition_value != 1)
{
/// Rewrite `sum(if(cond, 123, 0))` into `123 * countIf(cond)`.
node = getMultiplyFunction(nested_if_function_arguments_nodes[1], node);
}
return;
}
if (if_true_condition_value == 0 && !cond_argument->getResultType()->isNullable())
{
/// Rewrite `sum(if(cond, 0, 1))` into `countIf(not(cond))` if condition is not Nullable (otherwise the result can be different).
DataTypePtr not_function_result_type = std::make_shared<DataTypeUInt8>();
const auto & condition_result_type = nested_if_function_arguments_nodes[0]->getResultType();
if (condition_result_type->isNullable())
not_function_result_type = makeNullable(not_function_result_type);
auto not_function = std::make_shared<FunctionNode>("not");
auto & not_function_arguments = not_function->getArguments().getNodes();
not_function_arguments.push_back(nested_if_function_arguments_nodes[0]);
not_function->resolveAsFunction(FunctionFactory::instance().get("not", getContext())->build(not_function->getArgumentColumns()));
function_node_arguments_nodes[0] = std::move(not_function);
function_node_arguments_nodes.resize(1);
resolveAsCountIfAggregateFunction(*function_node, function_node_arguments_nodes[0]->getResultType());
if (if_false_condition_value != 1)
{
/// Rewrite `sum(if(cond, 0, 123))` into `123 * countIf(not(cond))` if condition is not Nullable (otherwise the result can be different).
node = getMultiplyFunction(nested_if_function_arguments_nodes[2], node);
}
return;
}
}
private:
static inline void resolveAsCountIfAggregateFunction(FunctionNode & function_node, const DataTypePtr & argument_type)
{
AggregateFunctionProperties properties;
auto aggregate_function = AggregateFunctionFactory::instance().get("countIf",
{argument_type},
function_node.getAggregateFunction()->getParameters(),
properties);
function_node.resolveAsAggregateFunction(std::move(aggregate_function));
}
inline QueryTreeNodePtr getMultiplyFunction(QueryTreeNodePtr left, QueryTreeNodePtr right)
{
auto multiply_function_node = std::make_shared<FunctionNode>("multiply");
auto & multiply_arguments_nodes = multiply_function_node->getArguments().getNodes();
multiply_arguments_nodes.push_back(std::move(left));
multiply_arguments_nodes.push_back(std::move(right));
auto multiply_function_base = FunctionFactory::instance().get("multiply", getContext())->build(multiply_function_node->getArgumentColumns());
multiply_function_node->resolveAsFunction(std::move(multiply_function_base));
return std::move(multiply_function_node);
}
};
}
void SumIfToCountIfPass::run(QueryTreeNodePtr query_tree_node, ContextPtr context)
{
SumIfToCountIfVisitor visitor(context);
visitor.visit(query_tree_node);
}
}
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