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#include <AggregateFunctions/Helpers.h>
#include <AggregateFunctions/AggregateFunctionFactory.h>
#include <AggregateFunctions/AggregateFunctionSequenceMatch.h>
#include <DataTypes/DataTypeDate.h>
#include <DataTypes/DataTypeDate32.h>
#include <DataTypes/DataTypeDateTime.h>
#include <base/range.h>
namespace DB
{
struct Settings;
namespace ErrorCodes
{
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
extern const int TOO_MANY_ARGUMENTS_FOR_FUNCTION;
extern const int TOO_FEW_ARGUMENTS_FOR_FUNCTION;
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
}
namespace
{
template <template <typename, typename> typename AggregateFunction, template <typename> typename Data>
AggregateFunctionPtr createAggregateFunctionSequenceBase(
const std::string & name, const DataTypes & argument_types, const Array & params, const Settings *)
{
if (params.size() != 1)
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Aggregate function {} requires exactly one parameter.",
name);
const auto arg_count = argument_types.size();
if (arg_count < 3)
throw Exception(ErrorCodes::TOO_FEW_ARGUMENTS_FOR_FUNCTION, "Aggregate function {} requires at least 3 arguments.",
name);
if (arg_count - 1 > max_events)
throw Exception(ErrorCodes::TOO_MANY_ARGUMENTS_FOR_FUNCTION, "Aggregate function {} supports up to {} event arguments.", name, max_events);
const auto * time_arg = argument_types.front().get();
for (const auto i : collections::range(1, arg_count))
{
const auto * cond_arg = argument_types[i].get();
if (!isUInt8(cond_arg))
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
"Illegal type {} of argument {} of aggregate function {}, must be UInt8",
cond_arg->getName(), toString(i + 1), name);
}
String pattern = params.front().safeGet<std::string>();
AggregateFunctionPtr res(createWithUnsignedIntegerType<AggregateFunction, Data>(*argument_types[0], argument_types, params, pattern));
if (res)
return res;
WhichDataType which(argument_types.front().get());
if (which.isDateTime())
return std::make_shared<AggregateFunction<DataTypeDateTime::FieldType, Data<DataTypeDateTime::FieldType>>>(argument_types, params, pattern);
else if (which.isDate())
return std::make_shared<AggregateFunction<DataTypeDate::FieldType, Data<DataTypeDate::FieldType>>>(argument_types, params, pattern);
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
"Illegal type {} of first argument of aggregate function {}, must be DateTime",
time_arg->getName(), name);
}
}
void registerAggregateFunctionsSequenceMatch(AggregateFunctionFactory & factory)
{
factory.registerFunction("sequenceMatch", createAggregateFunctionSequenceBase<AggregateFunctionSequenceMatch, AggregateFunctionSequenceMatchData>);
factory.registerFunction("sequenceCount", createAggregateFunctionSequenceBase<AggregateFunctionSequenceCount, AggregateFunctionSequenceMatchData>);
}
}
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