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#pragma once
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <Functions/IFunction.h>
#include <Functions/FunctionHelpers.h>
#include <Columns/ColumnVector.h>
#include <Columns/ColumnString.h>
#include <Columns/ColumnFixedString.h>
#include <Columns/ColumnArray.h>
#include <Columns/ColumnMap.h>
#include <Columns/ColumnsNumber.h>
#include <Interpreters/Context_fwd.h>
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_COLUMN;
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
}
template <typename Impl, typename Name, typename ResultType, bool is_suitable_for_short_circuit_arguments_execution = true>
class FunctionStringOrArrayToT : public IFunction
{
public:
static constexpr auto name = Name::name;
static FunctionPtr create(ContextPtr)
{
return std::make_shared<FunctionStringOrArrayToT>();
}
String getName() const override
{
return name;
}
size_t getNumberOfArguments() const override
{
return 1;
}
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override
{
return is_suitable_for_short_circuit_arguments_execution;
}
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
if (!isStringOrFixedString(arguments[0])
&& !isArray(arguments[0])
&& !isMap(arguments[0])
&& !isUUID(arguments[0])
&& !isIPv6(arguments[0])
&& !isIPv4(arguments[0]))
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Illegal type {} of argument of function {}", arguments[0]->getName(), getName());
return std::make_shared<DataTypeNumber<ResultType>>();
}
bool useDefaultImplementationForConstants() const override { return true; }
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & result_type, size_t input_rows_count) const override
{
const ColumnPtr column = arguments[0].column;
if (const ColumnString * col = checkAndGetColumn<ColumnString>(column.get()))
{
auto col_res = ColumnVector<ResultType>::create();
typename ColumnVector<ResultType>::Container & vec_res = col_res->getData();
vec_res.resize(col->size());
Impl::vector(col->getChars(), col->getOffsets(), vec_res);
return col_res;
}
else if (const ColumnFixedString * col_fixed = checkAndGetColumn<ColumnFixedString>(column.get()))
{
if (Impl::is_fixed_to_constant)
{
ResultType res = 0;
Impl::vectorFixedToConstant(col_fixed->getChars(), col_fixed->getN(), res);
return result_type->createColumnConst(col_fixed->size(), toField(res));
}
else
{
auto col_res = ColumnVector<ResultType>::create();
typename ColumnVector<ResultType>::Container & vec_res = col_res->getData();
vec_res.resize(col_fixed->size());
Impl::vectorFixedToVector(col_fixed->getChars(), col_fixed->getN(), vec_res);
return col_res;
}
}
else if (const ColumnArray * col_arr = checkAndGetColumn<ColumnArray>(column.get()))
{
auto col_res = ColumnVector<ResultType>::create();
typename ColumnVector<ResultType>::Container & vec_res = col_res->getData();
vec_res.resize(col_arr->size());
Impl::array(col_arr->getOffsets(), vec_res);
return col_res;
}
else if (const ColumnMap * col_map = checkAndGetColumn<ColumnMap>(column.get()))
{
auto col_res = ColumnVector<ResultType>::create();
typename ColumnVector<ResultType>::Container & vec_res = col_res->getData();
vec_res.resize(col_map->size());
const auto & col_nested = col_map->getNestedColumn();
Impl::array(col_nested.getOffsets(), vec_res);
return col_res;
}
else if (const ColumnUUID * col_uuid = checkAndGetColumn<ColumnUUID>(column.get()))
{
auto col_res = ColumnVector<ResultType>::create();
typename ColumnVector<ResultType>::Container & vec_res = col_res->getData();
vec_res.resize(col_uuid->size());
Impl::uuid(col_uuid->getData(), input_rows_count, vec_res);
return col_res;
}
else if (const ColumnIPv6 * col_ipv6 = checkAndGetColumn<ColumnIPv6>(column.get()))
{
auto col_res = ColumnVector<ResultType>::create();
typename ColumnVector<ResultType>::Container & vec_res = col_res->getData();
vec_res.resize(col_ipv6->size());
Impl::ipv6(col_ipv6->getData(), input_rows_count, vec_res);
return col_res;
}
else if (const ColumnIPv4 * col_ipv4 = checkAndGetColumn<ColumnIPv4>(column.get()))
{
auto col_res = ColumnVector<ResultType>::create();
typename ColumnVector<ResultType>::Container & vec_res = col_res->getData();
vec_res.resize(col_ipv4->size());
Impl::ipv4(col_ipv4->getData(), input_rows_count, vec_res);
return col_res;
}
else
throw Exception(ErrorCodes::ILLEGAL_COLUMN, "Illegal column {} of argument of function {}",
arguments[0].column->getName(), getName());
}
};
}
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