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https://github.com/ClickHouse/ClickHouse.git
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70d1adfe4b
* save format string for NetException * format exceptions * format exceptions 2 * format exceptions 3 * format exceptions 4 * format exceptions 5 * format exceptions 6 * fix * format exceptions 7 * format exceptions 8 * Update MergeTreeIndexGin.cpp * Update AggregateFunctionMap.cpp * Update AggregateFunctionMap.cpp * fix
110 lines
3.4 KiB
C++
110 lines
3.4 KiB
C++
#pragma once
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#include <Functions/IFunction.h>
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#include <Functions/FunctionHelpers.h>
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#include <Columns/ColumnString.h>
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#include <Columns/ColumnVector.h>
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#include <DataTypes/DataTypeString.h>
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#include <IO/WriteBufferFromVector.h>
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#include <IO/WriteHelpers.h>
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#include <Interpreters/Context_fwd.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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extern const int ILLEGAL_COLUMN;
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}
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/** formatReadableSize - prints the transferred size in bytes in form `123.45 GiB`.
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* formatReadableQuantity - prints the quantity in form of 123 million.
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*/
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template <typename Impl>
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class FunctionFormatReadable : public IFunction
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{
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public:
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static constexpr auto name = Impl::name;
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static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionFormatReadable<Impl>>(); }
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String getName() const override
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{
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return name;
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}
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override
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{
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return true;
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}
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size_t getNumberOfArguments() const override { return 1; }
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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const IDataType & type = *arguments[0];
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if (!isNativeNumber(type))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Cannot format {} because it's not a native numeric type", type.getName());
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return std::make_shared<DataTypeString>();
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}
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bool useDefaultImplementationForConstants() const override { return true; }
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t /*input_rows_count*/) const override
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{
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ColumnPtr res;
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if (!((res = executeType<UInt8>(arguments))
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|| (res = executeType<UInt16>(arguments))
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|| (res = executeType<UInt32>(arguments))
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|| (res = executeType<UInt64>(arguments))
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|| (res = executeType<Int8>(arguments))
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|| (res = executeType<Int16>(arguments))
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|| (res = executeType<Int32>(arguments))
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|| (res = executeType<Int64>(arguments))
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|| (res = executeType<Float32>(arguments))
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|| (res = executeType<Float64>(arguments))))
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throw Exception(ErrorCodes::ILLEGAL_COLUMN, "Illegal column {} of argument of function {}",
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arguments[0].column->getName(), getName());
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return res;
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}
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private:
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template <typename T>
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ColumnPtr executeType(const ColumnsWithTypeAndName & arguments) const
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{
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if (const ColumnVector<T> * col_from = checkAndGetColumn<ColumnVector<T>>(arguments[0].column.get()))
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{
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auto col_to = ColumnString::create();
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const typename ColumnVector<T>::Container & vec_from = col_from->getData();
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ColumnString::Chars & data_to = col_to->getChars();
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ColumnString::Offsets & offsets_to = col_to->getOffsets();
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size_t size = vec_from.size();
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data_to.resize(size * 2);
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offsets_to.resize(size);
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WriteBufferFromVector<ColumnString::Chars> buf_to(data_to);
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for (size_t i = 0; i < size; ++i)
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{
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Impl::format(static_cast<double>(vec_from[i]), buf_to);
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writeChar(0, buf_to);
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offsets_to[i] = buf_to.count();
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}
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buf_to.finalize();
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return col_to;
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}
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return nullptr;
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}
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};
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}
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