mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-01 14:10:50 +00:00
89 lines
3.4 KiB
C++
89 lines
3.4 KiB
C++
#include <AggregateFunctions/AggregateFunctionFactory.h>
|
|
#include <AggregateFunctions/Helpers.h>
|
|
#include <AggregateFunctions/AggregateFunctionUniqUpTo.h>
|
|
#include <DataTypes/DataTypeDate.h>
|
|
#include <DataTypes/DataTypeDateTime.h>
|
|
#include <DataTypes/DataTypeString.h>
|
|
#include <DataTypes/DataTypeFixedString.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
|
|
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
|
|
extern const int ARGUMENT_OUT_OF_BOUND;
|
|
}
|
|
|
|
|
|
namespace
|
|
{
|
|
|
|
static constexpr UInt8 uniq_upto_max_threshold = 100;
|
|
|
|
|
|
AggregateFunctionPtr createAggregateFunctionUniqUpTo(const std::string & name, const DataTypes & argument_types, const Array & params)
|
|
{
|
|
UInt8 threshold = 5; /// default value
|
|
|
|
if (!params.empty())
|
|
{
|
|
if (params.size() != 1)
|
|
throw Exception("Aggregate function " + name + " requires one parameter or less.", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
|
|
|
UInt64 threshold_param = applyVisitor(FieldVisitorConvertToNumber<UInt64>(), params[0]);
|
|
|
|
if (threshold_param > uniq_upto_max_threshold)
|
|
throw Exception("Too large parameter for aggregate function " + name + ". Maximum: " + toString(uniq_upto_max_threshold),
|
|
ErrorCodes::ARGUMENT_OUT_OF_BOUND);
|
|
|
|
threshold = threshold_param;
|
|
}
|
|
|
|
if (argument_types.size() == 1)
|
|
{
|
|
const IDataType & argument_type = *argument_types[0];
|
|
|
|
AggregateFunctionPtr res(createWithNumericType<AggregateFunctionUniqUpTo>(*argument_types[0], threshold));
|
|
|
|
if (res)
|
|
return res;
|
|
else if (typeid_cast<const DataTypeDate *>(&argument_type))
|
|
return std::make_shared<AggregateFunctionUniqUpTo<DataTypeDate::FieldType>>(threshold);
|
|
else if (typeid_cast<const DataTypeDateTime *>(&argument_type))
|
|
return std::make_shared<AggregateFunctionUniqUpTo<DataTypeDateTime::FieldType>>(threshold);
|
|
else if (typeid_cast<const DataTypeString *>(&argument_type) || typeid_cast<const DataTypeFixedString*>(&argument_type))
|
|
return std::make_shared<AggregateFunctionUniqUpTo<String>>(threshold);
|
|
else if (typeid_cast<const DataTypeTuple *>(&argument_type))
|
|
return std::make_shared<AggregateFunctionUniqUpToVariadic<true>>(argument_types, threshold);
|
|
else if (typeid_cast<const DataTypeUUID *>(&argument_type))
|
|
return std::make_shared<AggregateFunctionUniqUpTo<DataTypeUUID::FieldType>>(threshold);
|
|
else
|
|
throw Exception("Illegal type " + argument_types[0]->getName() + " of argument for aggregate function " + name, ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
|
}
|
|
else if (argument_types.size() > 1)
|
|
{
|
|
/// If there are several arguments, then no tuples allowed among them.
|
|
for (const auto & type : argument_types)
|
|
if (typeid_cast<const DataTypeTuple *>(type.get()))
|
|
throw Exception("Tuple argument of function " + name + " must be the only argument",
|
|
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
|
|
|
return std::make_shared<AggregateFunctionUniqUpToVariadic<false>>(argument_types, threshold);
|
|
}
|
|
else
|
|
throw Exception("Incorrect number of arguments for aggregate function " + name,
|
|
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
|
}
|
|
|
|
}
|
|
|
|
void registerAggregateFunctionUniqUpTo(AggregateFunctionFactory & factory)
|
|
{
|
|
factory.registerFunction("uniqUpTo", createAggregateFunctionUniqUpTo);
|
|
}
|
|
|
|
}
|