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67 lines
2.3 KiB
C++
67 lines
2.3 KiB
C++
#include <AggregateFunctions/AggregateFunctionFactory.h>
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#include <AggregateFunctions/AggregateFunctionGroupUniqArray.h>
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#include <AggregateFunctions/Helpers.h>
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#include <AggregateFunctions/FactoryHelpers.h>
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#include <DataTypes/DataTypeDate.h>
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#include <DataTypes/DataTypeDateTime.h>
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namespace DB
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{
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namespace
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{
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/// Substitute return type for Date and DateTime
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class AggregateFunctionGroupUniqArrayDate : public AggregateFunctionGroupUniqArray<DataTypeDate::FieldType>
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{
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DataTypePtr getReturnType() const override { return std::make_shared<DataTypeArray>(std::make_shared<DataTypeDate>()); }
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};
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class AggregateFunctionGroupUniqArrayDateTime : public AggregateFunctionGroupUniqArray<DataTypeDateTime::FieldType>
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{
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DataTypePtr getReturnType() const override { return std::make_shared<DataTypeArray>(std::make_shared<DataTypeDateTime>()); }
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};
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static IAggregateFunction * createWithExtraTypes(const DataTypePtr & argument_type)
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{
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WhichDataType which(argument_type);
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if (which.idx == TypeIndex::Date) return new AggregateFunctionGroupUniqArrayDate;
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else if (which.idx == TypeIndex::DateTime) return new AggregateFunctionGroupUniqArrayDateTime;
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else
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{
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/// Check that we can use plain version of AggreagteFunctionGroupUniqArrayGeneric
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if (argument_type->isValueUnambiguouslyRepresentedInContiguousMemoryRegion())
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return new AggreagteFunctionGroupUniqArrayGeneric<true>(argument_type);
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else
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return new AggreagteFunctionGroupUniqArrayGeneric<false>(argument_type);
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}
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}
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AggregateFunctionPtr createAggregateFunctionGroupUniqArray(const std::string & name, const DataTypes & argument_types, const Array & parameters)
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{
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assertNoParameters(name, parameters);
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assertUnary(name, argument_types);
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AggregateFunctionPtr res(createWithNumericType<AggregateFunctionGroupUniqArray>(*argument_types[0]));
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if (!res)
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res = AggregateFunctionPtr(createWithExtraTypes(argument_types[0]));
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if (!res)
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throw Exception("Illegal type " + argument_types[0]->getName() +
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" of argument for aggregate function " + name, ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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return res;
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}
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}
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void registerAggregateFunctionGroupUniqArray(AggregateFunctionFactory & factory)
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{
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factory.registerFunction("groupUniqArray", createAggregateFunctionGroupUniqArray);
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}
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}
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