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https://github.com/ClickHouse/ClickHouse.git
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1442 lines
46 KiB
C++
1442 lines
46 KiB
C++
#pragma once
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#include <Poco/UTF8Encoding.h>
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#include <Poco/Unicode.h>
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#include <DB/DataTypes/DataTypesNumberFixed.h>
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#include <DB/DataTypes/DataTypeString.h>
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#include <DB/DataTypes/DataTypeFixedString.h>
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#include <DB/DataTypes/DataTypeArray.h>
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#include <DB/Columns/ColumnString.h>
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#include <DB/Columns/ColumnArray.h>
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#include <DB/Columns/ColumnFixedString.h>
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#include <DB/Columns/ColumnConst.h>
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#include <DB/Functions/IFunction.h>
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#include <statdaemons/ext/range.hpp>
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namespace DB
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{
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/** Функции работы со строками:
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*
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* length, empty, notEmpty,
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* concat, substring, lower, upper, reverse, // left, right, insert, replace,
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* // escape, quote, unescape, unquote, trim, trimLeft, trimRight, pad, padLeft
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* lengthUTF8, substringUTF8, lowerUTF8, upperUTF8, reverseUTF8, // leftUTF8, rightUTF8, insertUTF8, replaceUTF8
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* // padUTF8, padLeftUTF8.
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*
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* s -> UInt8: empty, notEmpty
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* s -> UInt64: length, lengthUTF8
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* s -> s: lower, upper, lowerUTF8, upperUTF8, reverse, reverseUTF8, escape, quote, unescape, unquote, trim, trimLeft, trimRight
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* s, s -> s: concat
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* s, c1, c2 -> s: substring, substringUTF8
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* s, c1 -> s: left, right, leftUTF8, rightUTF8
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* s, c1, s2 -> s: insert, insertUTF8, pad, padLeft, padUTF8, padLeftUTF8
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* s, c1, c2, s2 -> s: replace, replaceUTF8
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*
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* Функции поиска строк и регулярных выражений расположены отдельно.
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* Функции работы с URL расположены отдельно.
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* Функции кодирования строк, конвертации в другие типы расположены отдельно.
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*
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* Функции length, empty, notEmpty также работают с массивами.
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*/
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template <bool negative = false>
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struct EmptyImpl
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{
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static void vector(const ColumnString::Chars_t & data, const ColumnString::Offsets_t & offsets,
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PODArray<UInt8> & res)
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{
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size_t size = offsets.size();
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ColumnString::Offset_t prev_offset = 1;
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for (size_t i = 0; i < size; ++i)
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{
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res[i] = negative ^ (offsets[i] == prev_offset);
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prev_offset = offsets[i] + 1;
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}
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}
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static void vector_fixed_to_constant(const ColumnString::Chars_t & data, size_t n,
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UInt8 & res)
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{
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res = negative ^ (n == 0);
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}
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static void vector_fixed_to_vector(const ColumnString::Chars_t & data, size_t n,
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PODArray<UInt8> & res)
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{
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}
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static void constant(const std::string & data, UInt8 & res)
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{
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res = negative ^ (data.empty());
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}
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static void array(const ColumnString::Offsets_t & offsets, PODArray<UInt8> & res)
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{
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size_t size = offsets.size();
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ColumnString::Offset_t prev_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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res[i] = negative ^ (offsets[i] == prev_offset);
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prev_offset = offsets[i];
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}
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}
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static void constant_array(const Array & data, UInt8 & res)
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{
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res = negative ^ (data.empty());
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}
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};
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/** Вычисляет длину строки в байтах.
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*/
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struct LengthImpl
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{
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static void vector(const ColumnString::Chars_t & data, const ColumnString::Offsets_t & offsets,
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PODArray<UInt64> & res)
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{
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size_t size = offsets.size();
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for (size_t i = 0; i < size; ++i)
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res[i] = i == 0
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? (offsets[i] - 1)
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: (offsets[i] - 1 - offsets[i - 1]);
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}
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static void vector_fixed_to_constant(const ColumnString::Chars_t & data, size_t n,
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UInt64 & res)
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{
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res = n;
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}
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static void vector_fixed_to_vector(const ColumnString::Chars_t & data, size_t n,
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PODArray<UInt64> & res)
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{
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}
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static void constant(const std::string & data, UInt64 & res)
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{
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res = data.size();
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}
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static void array(const ColumnString::Offsets_t & offsets, PODArray<UInt64> & res)
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{
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size_t size = offsets.size();
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for (size_t i = 0; i < size; ++i)
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res[i] = i == 0
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? (offsets[i])
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: (offsets[i] - offsets[i - 1]);
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}
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static void constant_array(const Array & data, UInt64 & res)
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{
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res = data.size();
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}
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};
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/** Если строка представляет собой текст в кодировке UTF-8, то возвращает длину текста в кодовых точках.
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* (не в символах: длина текста "ё" может быть как 1, так и 2, в зависимости от нормализации)
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* Иначе - поведение не определено.
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*/
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struct LengthUTF8Impl
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{
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static void vector(const ColumnString::Chars_t & data, const ColumnString::Offsets_t & offsets,
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PODArray<UInt64> & res)
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{
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size_t size = offsets.size();
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ColumnString::Offset_t prev_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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res[i] = 0;
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for (const UInt8 * c = &data[prev_offset]; c + 1 < &data[offsets[i]]; ++c)
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if (*c <= 0x7F || *c >= 0xC0)
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++res[i];
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prev_offset = offsets[i];
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}
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}
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static void vector_fixed_to_constant(const ColumnString::Chars_t & data, size_t n,
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UInt64 & res)
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{
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}
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static void vector_fixed_to_vector(const ColumnString::Chars_t & data, size_t n,
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PODArray<UInt64> & res)
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{
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size_t size = data.size() / n;
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for (size_t i = 0; i < size; ++i)
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{
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res[i] = 0;
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for (const UInt8 * c = &data[i * n]; c < &data[(i + 1) * n]; ++c)
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if (*c <= 0x7F || *c >= 0xC0)
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++res[i];
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}
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}
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static void constant(const std::string & data, UInt64 & res)
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{
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res = 0;
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for (const UInt8 * c = reinterpret_cast<const UInt8 *>(data.data()); c < reinterpret_cast<const UInt8 *>(data.data() + data.size()); ++c)
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if (*c <= 0x7F || *c >= 0xC0)
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++res;
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}
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static void array(const ColumnString::Offsets_t & offsets, PODArray<UInt64> & res)
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{
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throw Exception("Cannot apply function lengthUTF8 to Array argument", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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}
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static void constant_array(const Array & data, UInt64 & res)
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{
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throw Exception("Cannot apply function lengthUTF8 to Array argument", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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}
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};
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/** Переводит строку в нижний (верхний) регистр, в текущей локали, в однобайтовой кодировке.
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*/
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template <int F(int)>
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struct LowerUpperImpl
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{
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static void vector(const ColumnString::Chars_t & data, const ColumnString::Offsets_t & offsets,
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ColumnString::Chars_t & res_data, ColumnString::Offsets_t & res_offsets)
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{
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res_data.resize(data.size());
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res_offsets.assign(offsets);
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array(&*data.begin(), &*data.end(), &*res_data.begin());
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}
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static void vector_fixed(const ColumnString::Chars_t & data, size_t n,
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ColumnString::Chars_t & res_data)
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{
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res_data.resize(data.size());
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array(&*data.begin(), &*data.end(), &*res_data.begin());
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}
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static void constant(const std::string & data, std::string & res_data)
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{
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res_data.resize(data.size());
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array(reinterpret_cast<const UInt8 *>(&*data.begin()), reinterpret_cast<const UInt8 *>(&*data.end()),
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reinterpret_cast<UInt8 *>(&*res_data.begin()));
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}
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private:
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static void array(const UInt8 * src, const UInt8 * src_end, UInt8 * dst)
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{
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for (; src < src_end; ++src, ++dst)
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*dst = F(*src);
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}
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};
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/** Если строка содержит текст в кодировке UTF-8 - перевести его в нижний (верхний) регистр.
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* Замечание: предполагается, что после перевода символа в другой регистр,
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* длина его мультибайтовой последовательности в UTF-8 не меняется.
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* Иначе - поведение не определено.
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*/
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template <int F(int)>
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struct LowerUpperUTF8Impl
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{
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static void vector(const ColumnString::Chars_t & data, const ColumnString::Offsets_t & offsets,
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ColumnString::Chars_t & res_data, ColumnString::Offsets_t & res_offsets)
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{
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res_data.resize(data.size());
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res_offsets.assign(offsets);
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array(&*data.begin(), &*data.end(), &*res_data.begin());
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}
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static void vector_fixed(const ColumnString::Chars_t & data, size_t n,
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ColumnString::Chars_t & res_data)
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{
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res_data.resize(data.size());
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array(&*data.begin(), &*data.end(), &*res_data.begin());
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}
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static void constant(const std::string & data, std::string & res_data)
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{
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res_data.resize(data.size());
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array(reinterpret_cast<const UInt8 *>(&*data.begin()), reinterpret_cast<const UInt8 *>(&*data.end()),
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reinterpret_cast<UInt8 *>(&*res_data.begin()));
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}
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private:
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static void array(const UInt8 * src, const UInt8 * src_end, UInt8 * dst)
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{
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static Poco::UTF8Encoding utf8;
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while (src < src_end)
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{
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int chars = utf8.convert(F(utf8.convert(src)), dst, src_end - src);
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if (chars)
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{
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src += chars;
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dst += chars;
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}
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else
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{
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++src;
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++dst;
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}
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}
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}
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};
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/** Разворачивает строку в байтах.
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*/
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struct ReverseImpl
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{
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static void vector(const ColumnString::Chars_t & data, const ColumnString::Offsets_t & offsets,
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ColumnString::Chars_t & res_data, ColumnString::Offsets_t & res_offsets)
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{
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res_data.resize(data.size());
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res_offsets.assign(offsets);
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size_t size = offsets.size();
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ColumnString::Offset_t prev_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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for (size_t j = prev_offset; j < offsets[i] - 1; ++j)
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res_data[j] = data[offsets[i] + prev_offset - 2 - j];
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res_data[offsets[i] - 1] = 0;
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prev_offset = offsets[i];
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}
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}
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static void vector_fixed(const ColumnString::Chars_t & data, size_t n,
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ColumnString::Chars_t & res_data)
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{
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res_data.resize(data.size());
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size_t size = data.size() / n;
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for (size_t i = 0; i < size; ++i)
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for (size_t j = i * n; j < (i + 1) * n; ++j)
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res_data[j] = data[(i * 2 + 1) * n - j - 1];
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}
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static void constant(const std::string & data, std::string & res_data)
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{
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res_data.resize(data.size());
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for (size_t j = 0; j < data.size(); ++j)
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res_data[j] = data[data.size() - j - 1];
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}
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};
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/** Разворачивает последовательность кодовых точек в строке в кодировке UTF-8.
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* Результат может не соответствовать ожидаемому, так как модифицирующие кодовые точки (например, диакритика) могут примениться не к тем символам.
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* Если строка не в кодировке UTF-8, то поведение не определено.
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*/
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struct ReverseUTF8Impl
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{
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static void vector(const ColumnString::Chars_t & data, const ColumnString::Offsets_t & offsets,
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ColumnString::Chars_t & res_data, ColumnString::Offsets_t & res_offsets)
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{
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res_data.resize(data.size());
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res_offsets.assign(offsets);
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size_t size = offsets.size();
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ColumnString::Offset_t prev_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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ColumnString::Offset_t j = prev_offset;
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while (j < offsets[i] - 1)
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{
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if (data[j] < 0xBF)
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{
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res_data[offsets[i] + prev_offset - 2 - j] = data[j];
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j += 1;
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}
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else if (data[j] < 0xE0)
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{
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memcpy(&res_data[offsets[i] + prev_offset - 2 - j - 1], &data[j], 2);
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j += 2;
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}
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else if (data[j] < 0xF0)
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{
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memcpy(&res_data[offsets[i] + prev_offset - 2 - j - 2], &data[j], 3);
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j += 3;
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}
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else
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{
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res_data[offsets[i] + prev_offset - 2 - j] = data[j];
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j += 1;
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}
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}
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res_data[offsets[i] - 1] = 0;
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prev_offset = offsets[i];
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}
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}
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static void vector_fixed(const ColumnString::Chars_t & data, size_t n,
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ColumnString::Chars_t & res_data)
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{
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throw Exception("Cannot apply function reverseUTF8 to fixed string.", ErrorCodes::ILLEGAL_COLUMN);
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}
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static void constant(const std::string & data, std::string & res_data)
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{
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res_data.resize(data.size());
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size_t j = 0;
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while (j < data.size())
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{
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if (static_cast<unsigned char>(data[j]) < 0xBF)
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{
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res_data[data.size() - 1 - j] = data[j];
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j += 1;
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}
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else if (static_cast<unsigned char>(data[j]) < 0xE0)
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{
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memcpy(&res_data[data.size() - 1 - j - 1], &data[j], 2);
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j += 2;
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}
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else if (static_cast<unsigned char>(data[j]) < 0xF0)
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{
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memcpy(&res_data[data.size() - 1 - j - 2], &data[j], 3);
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j += 3;
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}
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else
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{
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res_data[data.size() - 1 - j] = data[j];
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j += 1;
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}
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}
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}
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};
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/** Выделяет подстроку в строке, как последовательности байт.
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*/
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struct SubstringImpl
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{
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static void vector(const ColumnString::Chars_t & data, const ColumnString::Offsets_t & offsets,
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size_t start, size_t length,
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ColumnString::Chars_t & res_data, ColumnString::Offsets_t & res_offsets)
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{
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res_data.reserve(data.size());
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size_t size = offsets.size();
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res_offsets.resize(size);
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ColumnString::Offset_t prev_offset = 0;
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ColumnString::Offset_t res_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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if (start + prev_offset >= offsets[i] + 1)
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{
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res_data.resize(res_data.size() + 1);
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res_data[res_offset] = 0;
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++res_offset;
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}
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else
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{
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size_t bytes_to_copy = std::min(offsets[i] - prev_offset - start, length);
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res_data.resize(res_data.size() + bytes_to_copy + 1);
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memcpy(&res_data[res_offset], &data[prev_offset + start - 1], bytes_to_copy);
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res_offset += bytes_to_copy + 1;
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res_data[res_offset - 1] = 0;
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}
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res_offsets[i] = res_offset;
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prev_offset = offsets[i];
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}
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}
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static void vector_fixed(const ColumnString::Chars_t & data, size_t n,
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size_t start, size_t length,
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ColumnString::Chars_t & res_data, ColumnString::Offsets_t & res_offsets)
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{
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if (length == 0 || start + length > n + 1)
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throw Exception("Index out of bound for function substring of fixed size value", ErrorCodes::ARGUMENT_OUT_OF_BOUND);
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||
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||
size_t size = data.size() / n;
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res_offsets.resize(size);
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res_data.resize(length * size + size);
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||
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ColumnString::Offset_t res_offset = 0;
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for (size_t i = 0; i < size; ++i)
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||
{
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memcpy(&res_data[res_offset], &data[i * n + start - 1], length);
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||
res_offset += length;
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||
res_data[res_offset] = 0;
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++res_offset;
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res_offsets[i] = res_offset;
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||
}
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||
}
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||
static void constant(const std::string & data,
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||
size_t start, size_t length,
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std::string & res_data)
|
||
{
|
||
if (start + length > data.size() + 1)
|
||
throw Exception("Index out of bound for function substring of fixed size value", ErrorCodes::ARGUMENT_OUT_OF_BOUND);
|
||
|
||
res_data = data.substr(start - 1, length);
|
||
}
|
||
};
|
||
|
||
|
||
/** Если строка в кодировке UTF-8, то выделяет в ней подстроку кодовых точек.
|
||
* Иначе - поведение не определено.
|
||
*/
|
||
struct SubstringUTF8Impl
|
||
{
|
||
static void vector(const ColumnString::Chars_t & data, const ColumnString::Offsets_t & offsets,
|
||
size_t start, size_t length,
|
||
ColumnString::Chars_t & res_data, ColumnString::Offsets_t & res_offsets)
|
||
{
|
||
res_data.reserve(data.size());
|
||
size_t size = offsets.size();
|
||
res_offsets.resize(size);
|
||
|
||
ColumnString::Offset_t prev_offset = 0;
|
||
ColumnString::Offset_t res_offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
ColumnString::Offset_t j = prev_offset;
|
||
ColumnString::Offset_t pos = 1;
|
||
ColumnString::Offset_t bytes_start = 0;
|
||
ColumnString::Offset_t bytes_length = 0;
|
||
while (j < offsets[i] - 1)
|
||
{
|
||
if (pos == start)
|
||
bytes_start = j - prev_offset + 1;
|
||
|
||
if (data[j] < 0xBF)
|
||
j += 1;
|
||
else if (data[j] < 0xE0)
|
||
j += 2;
|
||
else if (data[j] < 0xF0)
|
||
j += 3;
|
||
else
|
||
j += 1;
|
||
|
||
if (pos >= start && pos < start + length)
|
||
bytes_length = j - prev_offset + 1 - bytes_start;
|
||
else if (pos >= start + length)
|
||
break;
|
||
|
||
++pos;
|
||
}
|
||
|
||
if (bytes_start == 0)
|
||
{
|
||
res_data.resize(res_data.size() + 1);
|
||
res_data[res_offset] = 0;
|
||
++res_offset;
|
||
}
|
||
else
|
||
{
|
||
size_t bytes_to_copy = std::min(offsets[i] - prev_offset - bytes_start, bytes_length);
|
||
res_data.resize(res_data.size() + bytes_to_copy + 1);
|
||
memcpy(&res_data[res_offset], &data[prev_offset + bytes_start - 1], bytes_to_copy);
|
||
res_offset += bytes_to_copy + 1;
|
||
res_data[res_offset - 1] = 0;
|
||
}
|
||
res_offsets[i] = res_offset;
|
||
prev_offset = offsets[i];
|
||
}
|
||
}
|
||
|
||
static void vector_fixed(const ColumnString::Chars_t & data, ColumnString::Offset_t n,
|
||
size_t start, size_t length,
|
||
ColumnString::Chars_t & res_data, ColumnString::Offsets_t & res_offsets)
|
||
{
|
||
throw Exception("Cannot apply function substringUTF8 to fixed string.", ErrorCodes::ILLEGAL_COLUMN);
|
||
}
|
||
|
||
static void constant(const std::string & data,
|
||
size_t start, size_t length,
|
||
std::string & res_data)
|
||
{
|
||
if (start + length > data.size() + 1)
|
||
throw Exception("Index out of bound for function substring of constant value", ErrorCodes::ARGUMENT_OUT_OF_BOUND);
|
||
|
||
ColumnString::Offset_t j = 0;
|
||
ColumnString::Offset_t pos = 1;
|
||
ColumnString::Offset_t bytes_start = 0;
|
||
ColumnString::Offset_t bytes_length = 0;
|
||
while (j < data.size())
|
||
{
|
||
if (pos == start)
|
||
bytes_start = j + 1;
|
||
|
||
if (static_cast<unsigned char>(data[j]) < 0xBF)
|
||
j += 1;
|
||
else if (static_cast<unsigned char>(data[j]) < 0xE0)
|
||
j += 2;
|
||
else if (static_cast<unsigned char>(data[j]) < 0xF0)
|
||
j += 3;
|
||
else
|
||
j += 1;
|
||
|
||
if (pos >= start && pos < start + length)
|
||
bytes_length = j + 1 - bytes_start;
|
||
else if (pos >= start + length)
|
||
break;
|
||
|
||
++pos;
|
||
}
|
||
|
||
if (bytes_start != 0)
|
||
res_data = data.substr(bytes_start - 1, bytes_length);
|
||
}
|
||
};
|
||
|
||
|
||
template <typename Impl, typename Name, typename ResultType>
|
||
class FunctionStringOrArrayToT : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = Name::name;
|
||
static IFunction * create(const Context & context) { return new FunctionStringOrArrayToT; }
|
||
|
||
/// Получить имя функции.
|
||
String getName() const
|
||
{
|
||
return name;
|
||
}
|
||
|
||
/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnType(const DataTypes & arguments) const
|
||
{
|
||
if (arguments.size() != 1)
|
||
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
|
||
+ toString(arguments.size()) + ", should be 1.",
|
||
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
||
|
||
if (!typeid_cast<const DataTypeString *>(&*arguments[0]) && !typeid_cast<const DataTypeFixedString *>(&*arguments[0])
|
||
&& !typeid_cast<const DataTypeArray *>(&*arguments[0]))
|
||
throw Exception("Illegal type " + arguments[0]->getName() + " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
return new typename DataTypeFromFieldType<ResultType>::Type;
|
||
}
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
|
||
{
|
||
const ColumnPtr column = block.getByPosition(arguments[0]).column;
|
||
if (const ColumnString * col = typeid_cast<const ColumnString *>(&*column))
|
||
{
|
||
ColumnVector<ResultType> * col_res = new ColumnVector<ResultType>;
|
||
block.getByPosition(result).column = col_res;
|
||
|
||
typename ColumnVector<ResultType>::Container_t & vec_res = col_res->getData();
|
||
vec_res.resize(col->size());
|
||
Impl::vector(col->getChars(), col->getOffsets(), vec_res);
|
||
}
|
||
else if (const ColumnFixedString * col = typeid_cast<const ColumnFixedString *>(&*column))
|
||
{
|
||
/// Для фиксированной строки, только функция lengthUTF8 возвращает не константу.
|
||
if ("lengthUTF8" != getName())
|
||
{
|
||
ResultType res = 0;
|
||
Impl::vector_fixed_to_constant(col->getChars(), col->getN(), res);
|
||
|
||
ColumnConst<ResultType> * col_res = new ColumnConst<ResultType>(col->size(), res);
|
||
block.getByPosition(result).column = col_res;
|
||
}
|
||
else
|
||
{
|
||
ColumnVector<ResultType> * col_res = new ColumnVector<ResultType>;
|
||
block.getByPosition(result).column = col_res;
|
||
|
||
typename ColumnVector<ResultType>::Container_t & vec_res = col_res->getData();
|
||
vec_res.resize(col->size());
|
||
Impl::vector_fixed_to_vector(col->getChars(), col->getN(), vec_res);
|
||
}
|
||
}
|
||
else if (const ColumnConstString * col = typeid_cast<const ColumnConstString *>(&*column))
|
||
{
|
||
ResultType res = 0;
|
||
Impl::constant(col->getData(), res);
|
||
|
||
ColumnConst<ResultType> * col_res = new ColumnConst<ResultType>(col->size(), res);
|
||
block.getByPosition(result).column = col_res;
|
||
}
|
||
else if (const ColumnArray * col = typeid_cast<const ColumnArray *>(&*column))
|
||
{
|
||
ColumnVector<ResultType> * col_res = new ColumnVector<ResultType>;
|
||
block.getByPosition(result).column = col_res;
|
||
|
||
typename ColumnVector<ResultType>::Container_t & vec_res = col_res->getData();
|
||
vec_res.resize(col->size());
|
||
Impl::array(col->getOffsets(), vec_res);
|
||
}
|
||
else if (const ColumnConstArray * col = typeid_cast<const ColumnConstArray *>(&*column))
|
||
{
|
||
ResultType res = 0;
|
||
Impl::constant_array(col->getData(), res);
|
||
|
||
ColumnConst<ResultType> * col_res = new ColumnConst<ResultType>(col->size(), res);
|
||
block.getByPosition(result).column = col_res;
|
||
}
|
||
else
|
||
throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
|
||
+ " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_COLUMN);
|
||
}
|
||
};
|
||
|
||
|
||
template <typename Impl, typename Name>
|
||
class FunctionStringToString : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = Name::name;
|
||
static IFunction * create(const Context & context) { return new FunctionStringToString; }
|
||
|
||
/// Получить имя функции.
|
||
String getName() const
|
||
{
|
||
return name;
|
||
}
|
||
|
||
/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnType(const DataTypes & arguments) const
|
||
{
|
||
if (arguments.size() != 1)
|
||
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
|
||
+ toString(arguments.size()) + ", should be 1.",
|
||
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
||
|
||
if (!typeid_cast<const DataTypeString *>(&*arguments[0]) && !typeid_cast<const DataTypeFixedString *>(&*arguments[0]))
|
||
throw Exception("Illegal type " + arguments[0]->getName() + " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
return arguments[0]->clone();
|
||
}
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
|
||
{
|
||
const ColumnPtr column = block.getByPosition(arguments[0]).column;
|
||
if (const ColumnString * col = typeid_cast<const ColumnString *>(&*column))
|
||
{
|
||
ColumnString * col_res = new ColumnString;
|
||
block.getByPosition(result).column = col_res;
|
||
Impl::vector(col->getChars(), col->getOffsets(),
|
||
col_res->getChars(), col_res->getOffsets());
|
||
}
|
||
else if (const ColumnFixedString * col = typeid_cast<const ColumnFixedString *>(&*column))
|
||
{
|
||
ColumnFixedString * col_res = new ColumnFixedString(col->getN());
|
||
block.getByPosition(result).column = col_res;
|
||
Impl::vector_fixed(col->getChars(), col->getN(),
|
||
col_res->getChars());
|
||
}
|
||
else if (const ColumnConstString * col = typeid_cast<const ColumnConstString *>(&*column))
|
||
{
|
||
String res;
|
||
Impl::constant(col->getData(), res);
|
||
ColumnConstString * col_res = new ColumnConstString(col->size(), res);
|
||
block.getByPosition(result).column = col_res;
|
||
}
|
||
else
|
||
throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
|
||
+ " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_COLUMN);
|
||
}
|
||
};
|
||
|
||
|
||
class FunctionConcat : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = "concat";
|
||
static IFunction * create(const Context & context) { return new FunctionConcat; }
|
||
|
||
/// Получить имя функции.
|
||
String getName() const
|
||
{
|
||
return name;
|
||
}
|
||
|
||
/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnType(const DataTypes & arguments) const
|
||
{
|
||
if (arguments.size() < 2)
|
||
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
|
||
+ toString(arguments.size()) + ", should be at least 1.",
|
||
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
||
|
||
for (const auto arg_idx : ext::range(0, arguments.size()))
|
||
{
|
||
const auto arg = arguments[arg_idx].get();
|
||
if (!typeid_cast<const DataTypeString *>(arg) &&
|
||
!typeid_cast<const DataTypeFixedString *>(arg))
|
||
throw Exception{
|
||
"Illegal type " + arg->getName() + " of argument " + std::to_string(arg_idx + 1) + " of function " + getName(),
|
||
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT
|
||
};
|
||
}
|
||
|
||
return new DataTypeString;
|
||
}
|
||
|
||
void execute(Block & block, const ColumnNumbers & arguments, const size_t result)
|
||
{
|
||
if (arguments.size() == 2)
|
||
executeBinary(block, arguments, result);
|
||
else
|
||
executeNAry(block, arguments, result);
|
||
}
|
||
|
||
private:
|
||
enum class instr_type : uint8_t
|
||
{
|
||
copy_string,
|
||
copy_fixed_string,
|
||
copy_const_string
|
||
};
|
||
|
||
/// column pointer augmented with offset (current offset String/FixedString, unused for Const<String>)
|
||
using column_uint_pair_t = std::pair<const IColumn *, IColumn::Offset_t>;
|
||
/// instr_type is being stored to allow using static_cast safely
|
||
using instr_t = std::pair<instr_type, column_uint_pair_t>;
|
||
using instrs_t = std::vector<instr_t>;
|
||
|
||
/** calculate total length of resulting strings (without terminating nulls), determine whether all input
|
||
* strings are constant, assemble instructions */
|
||
instrs_t getInstructions(const Block & block, const ColumnNumbers & arguments, size_t & out_length, bool & out_const)
|
||
{
|
||
instrs_t result{};
|
||
result.reserve(arguments.size());
|
||
|
||
out_length = 0;
|
||
out_const = true;
|
||
|
||
size_t rows{};
|
||
for (const auto arg_pos : arguments)
|
||
{
|
||
const auto column = block.getByPosition(arg_pos).column.get();
|
||
|
||
if (const auto col = typeid_cast<const ColumnString *>(column))
|
||
{
|
||
/** ColumnString stores strings with terminating null character
|
||
* which should not be copied, therefore the decrease of total size by
|
||
* the number of terminating nulls */
|
||
rows = col->size();
|
||
out_length += col->getChars().size() - col->getOffsets().size();
|
||
out_const = false;
|
||
|
||
result.emplace_back(instr_type::copy_string, column_uint_pair_t{col, 0});
|
||
}
|
||
else if (const auto col = typeid_cast<const ColumnFixedString *>(column))
|
||
{
|
||
rows = col->size();
|
||
out_length += col->getChars().size();
|
||
out_const = false;
|
||
|
||
result.emplace_back(instr_type::copy_fixed_string, column_uint_pair_t{col, 0});
|
||
}
|
||
else if (const auto col = typeid_cast<const ColumnConstString *>(column))
|
||
{
|
||
rows = col->size();
|
||
out_length += col->getData().size() * col->size();
|
||
out_const = out_const && true;
|
||
|
||
result.emplace_back(instr_type::copy_const_string, column_uint_pair_t{col, 0});
|
||
}
|
||
else
|
||
throw Exception("Illegal column " + column->getName() + " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_COLUMN);
|
||
}
|
||
|
||
if (out_const && rows)
|
||
out_length /= rows;
|
||
|
||
return result;
|
||
}
|
||
|
||
void executeBinary(Block & block, const ColumnNumbers & arguments, const size_t result)
|
||
{
|
||
const IColumn * c0 = &*block.getByPosition(arguments[0]).column;
|
||
const IColumn * c1 = &*block.getByPosition(arguments[1]).column;
|
||
|
||
const ColumnString * c0_string = typeid_cast<const ColumnString *>(c0);
|
||
const ColumnString * c1_string = typeid_cast<const ColumnString *>(c1);
|
||
const ColumnFixedString * c0_fixed_string = typeid_cast<const ColumnFixedString *>(c0);
|
||
const ColumnFixedString * c1_fixed_string = typeid_cast<const ColumnFixedString *>(c1);
|
||
const ColumnConstString * c0_const = typeid_cast<const ColumnConstString *>(c0);
|
||
const ColumnConstString * c1_const = typeid_cast<const ColumnConstString *>(c1);
|
||
|
||
/// Результат - const string
|
||
if (c0_const && c1_const)
|
||
{
|
||
ColumnConstString * c_res = new ColumnConstString(c0_const->size(), "");
|
||
block.getByPosition(result).column = c_res;
|
||
constant_constant(c0_const->getData(), c1_const->getData(), c_res->getData());
|
||
}
|
||
else
|
||
{
|
||
ColumnString * c_res = new ColumnString;
|
||
block.getByPosition(result).column = c_res;
|
||
ColumnString::Chars_t & vec_res = c_res->getChars();
|
||
ColumnString::Offsets_t & offsets_res = c_res->getOffsets();
|
||
|
||
if (c0_string && c1_string)
|
||
vector_vector(
|
||
c0_string->getChars(), c0_string->getOffsets(),
|
||
c1_string->getChars(), c1_string->getOffsets(),
|
||
vec_res, offsets_res);
|
||
else if (c0_string && c1_fixed_string)
|
||
vector_fixed_vector(
|
||
c0_string->getChars(), c0_string->getOffsets(),
|
||
c1_fixed_string->getChars(), c1_fixed_string->getN(),
|
||
vec_res, offsets_res);
|
||
else if (c0_string && c1_const)
|
||
vector_constant(
|
||
c0_string->getChars(), c0_string->getOffsets(),
|
||
c1_const->getData(),
|
||
vec_res, offsets_res);
|
||
else if (c0_fixed_string && c1_string)
|
||
fixed_vector_vector(
|
||
c0_fixed_string->getChars(), c0_fixed_string->getN(),
|
||
c1_string->getChars(), c1_string->getOffsets(),
|
||
vec_res, offsets_res);
|
||
else if (c0_const && c1_string)
|
||
constant_vector(
|
||
c0_const->getData(),
|
||
c1_string->getChars(), c1_string->getOffsets(),
|
||
vec_res, offsets_res);
|
||
else if (c0_fixed_string && c1_fixed_string)
|
||
fixed_vector_fixed_vector(
|
||
c0_fixed_string->getChars(), c0_fixed_string->getN(),
|
||
c1_fixed_string->getChars(), c1_fixed_string->getN(),
|
||
vec_res, offsets_res);
|
||
else if (c0_fixed_string && c1_const)
|
||
fixed_vector_constant(
|
||
c0_fixed_string->getChars(), c0_fixed_string->getN(),
|
||
c1_const->getData(),
|
||
vec_res, offsets_res);
|
||
else if (c0_const && c1_fixed_string)
|
||
constant_fixed_vector(
|
||
c0_const->getData(),
|
||
c1_fixed_string->getChars(), c1_fixed_string->getN(),
|
||
vec_res, offsets_res);
|
||
else
|
||
throw Exception("Illegal columns "
|
||
+ block.getByPosition(arguments[0]).column->getName() + " and "
|
||
+ block.getByPosition(arguments[1]).column->getName()
|
||
+ " of arguments of function " + getName(),
|
||
ErrorCodes::ILLEGAL_COLUMN);
|
||
}
|
||
}
|
||
|
||
void executeNAry(Block & block, const ColumnNumbers & arguments, const size_t result)
|
||
{
|
||
const auto size = block.rowsInFirstColumn();
|
||
std::size_t result_length{};
|
||
bool result_is_const{};
|
||
auto instrs = getInstructions(block, arguments, result_length, result_is_const);
|
||
|
||
if (result_is_const)
|
||
{
|
||
const auto out = new ColumnConst<String>{size, ""};
|
||
block.getByPosition(result).column = out;
|
||
|
||
auto & data = out->getData();
|
||
data.reserve(result_length);
|
||
|
||
for (const auto & instr : instrs)
|
||
data += static_cast<const ColumnConst<String> *>(instr.second.first)->getData();
|
||
}
|
||
else
|
||
{
|
||
const auto out = new ColumnString{};
|
||
block.getByPosition(result).column = out;
|
||
|
||
auto & out_data = out->getChars();
|
||
out_data.resize(result_length + size);
|
||
|
||
auto & out_offsets = out->getOffsets();
|
||
out_offsets.resize(size);
|
||
|
||
std::size_t out_offset{};
|
||
|
||
for (const auto row : ext::range(0, size))
|
||
{
|
||
for (auto & instr : instrs)
|
||
{
|
||
if (instr_type::copy_string == instr.first)
|
||
{
|
||
auto & in_offset = instr.second.second;
|
||
const auto col = static_cast<const ColumnString *>(instr.second.first);
|
||
const auto offset = col->getOffsets()[row];
|
||
const auto length = offset - in_offset - 1;
|
||
|
||
memcpy(&out_data[out_offset], &col->getChars()[in_offset], length);
|
||
out_offset += length;
|
||
in_offset = offset;
|
||
}
|
||
else if (instr_type::copy_fixed_string == instr.first)
|
||
{
|
||
auto & in_offset = instr.second.second;
|
||
const auto col = static_cast<const ColumnFixedString *>(instr.second.first);
|
||
const auto length = col->getN();
|
||
|
||
memcpy(&out_data[out_offset], &col->getChars()[in_offset], length);
|
||
out_offset += length;
|
||
in_offset += length;
|
||
}
|
||
else if (instr_type::copy_const_string == instr.first)
|
||
{
|
||
const auto col = static_cast<const ColumnConst<String> *>(instr.second.first);
|
||
const auto & data = col->getData();
|
||
const auto length = data.size();
|
||
|
||
memcpy(&out_data[out_offset], data.data(), length);
|
||
out_offset += length;
|
||
}
|
||
else
|
||
throw std::logic_error{"unknown instr_type"};
|
||
}
|
||
|
||
out_data[out_offset] = '\0';
|
||
out_offsets[row] = ++out_offset;
|
||
}
|
||
}
|
||
}
|
||
|
||
static void vector_vector(
|
||
const ColumnString::Chars_t & a_data, const ColumnString::Offsets_t & a_offsets,
|
||
const ColumnString::Chars_t & b_data, const ColumnString::Offsets_t & b_offsets,
|
||
ColumnString::Chars_t & c_data, ColumnString::Offsets_t & c_offsets)
|
||
{
|
||
size_t size = a_offsets.size();
|
||
c_data.resize(a_data.size() + b_data.size() - size);
|
||
c_offsets.resize(size);
|
||
|
||
ColumnString::Offset_t offset = 0;
|
||
ColumnString::Offset_t a_offset = 0;
|
||
ColumnString::Offset_t b_offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
memcpy(&c_data[offset], &a_data[a_offset], a_offsets[i] - a_offset - 1);
|
||
offset += a_offsets[i] - a_offset - 1;
|
||
memcpy(&c_data[offset], &b_data[b_offset], b_offsets[i] - b_offset);
|
||
offset += b_offsets[i] - b_offset;
|
||
|
||
a_offset = a_offsets[i];
|
||
b_offset = b_offsets[i];
|
||
|
||
c_offsets[i] = offset;
|
||
}
|
||
}
|
||
|
||
static void vector_fixed_vector(
|
||
const ColumnString::Chars_t & a_data, const ColumnString::Offsets_t & a_offsets,
|
||
const ColumnString::Chars_t & b_data, ColumnString::Offset_t b_n,
|
||
ColumnString::Chars_t & c_data, ColumnString::Offsets_t & c_offsets)
|
||
{
|
||
size_t size = a_offsets.size();
|
||
c_data.resize(a_data.size() + b_data.size());
|
||
c_offsets.resize(size);
|
||
|
||
ColumnString::Offset_t offset = 0;
|
||
ColumnString::Offset_t a_offset = 0;
|
||
ColumnString::Offset_t b_offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
memcpy(&c_data[offset], &a_data[a_offset], a_offsets[i] - a_offset - 1);
|
||
offset += a_offsets[i] - a_offset - 1;
|
||
memcpy(&c_data[offset], &b_data[b_offset], b_n);
|
||
offset += b_n;
|
||
c_data[offset] = 0;
|
||
offset += 1;
|
||
|
||
a_offset = a_offsets[i];
|
||
b_offset += b_n;
|
||
|
||
c_offsets[i] = offset;
|
||
}
|
||
}
|
||
|
||
static void vector_constant(
|
||
const ColumnString::Chars_t & a_data, const ColumnString::Offsets_t & a_offsets,
|
||
const std::string & b,
|
||
ColumnString::Chars_t & c_data, ColumnString::Offsets_t & c_offsets)
|
||
{
|
||
size_t size = a_offsets.size();
|
||
c_data.resize(a_data.size() + b.size() * size);
|
||
c_offsets.assign(a_offsets);
|
||
|
||
for (size_t i = 0; i < size; ++i)
|
||
c_offsets[i] += b.size() * (i + 1);
|
||
|
||
ColumnString::Offset_t offset = 0;
|
||
ColumnString::Offset_t a_offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
memcpy(&c_data[offset], &a_data[a_offset], a_offsets[i] - a_offset - 1);
|
||
offset += a_offsets[i] - a_offset - 1;
|
||
memcpy(&c_data[offset], b.data(), b.size() + 1);
|
||
offset += b.size() + 1;
|
||
|
||
a_offset = a_offsets[i];
|
||
}
|
||
}
|
||
|
||
static void fixed_vector_vector(
|
||
const ColumnString::Chars_t & a_data, ColumnString::Offset_t a_n,
|
||
const ColumnString::Chars_t & b_data, const ColumnString::Offsets_t & b_offsets,
|
||
ColumnString::Chars_t & c_data, ColumnString::Offsets_t & c_offsets)
|
||
{
|
||
size_t size = b_offsets.size();
|
||
c_data.resize(a_data.size() + b_data.size());
|
||
c_offsets.resize(size);
|
||
|
||
ColumnString::Offset_t offset = 0;
|
||
ColumnString::Offset_t a_offset = 0;
|
||
ColumnString::Offset_t b_offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
memcpy(&c_data[offset], &a_data[a_offset], a_n);
|
||
offset += a_n;
|
||
memcpy(&c_data[offset], &b_data[b_offset], b_offsets[i] - b_offset);
|
||
offset += b_offsets[i] - b_offset;
|
||
|
||
a_offset = a_n;
|
||
b_offset = b_offsets[i];
|
||
|
||
c_offsets[i] = offset;
|
||
}
|
||
}
|
||
|
||
static void fixed_vector_fixed_vector(
|
||
const ColumnString::Chars_t & a_data, ColumnString::Offset_t a_n,
|
||
const ColumnString::Chars_t & b_data, ColumnString::Offset_t b_n,
|
||
ColumnString::Chars_t & c_data, ColumnString::Offsets_t & c_offsets)
|
||
{
|
||
size_t size = a_data.size() / a_n;
|
||
c_data.resize(a_data.size() + b_data.size() + size);
|
||
c_offsets.resize(size);
|
||
|
||
ColumnString::Offset_t offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
memcpy(&c_data[offset], &a_data[i * a_n], a_n);
|
||
offset += a_n;
|
||
memcpy(&c_data[offset], &b_data[i * b_n], b_n);
|
||
offset += b_n;
|
||
c_data[offset] = 0;
|
||
++offset;
|
||
|
||
c_offsets[i] = offset;
|
||
}
|
||
}
|
||
|
||
static void fixed_vector_constant(
|
||
const ColumnString::Chars_t & a_data, ColumnString::Offset_t a_n,
|
||
const std::string & b,
|
||
ColumnString::Chars_t & c_data, ColumnString::Offsets_t & c_offsets)
|
||
{
|
||
size_t size = a_data.size() / a_n;
|
||
ColumnString::Offset_t b_n = b.size();
|
||
c_data.resize(a_data.size() + size * b_n + size);
|
||
c_offsets.resize(size);
|
||
|
||
ColumnString::Offset_t offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
memcpy(&c_data[offset], &a_data[i * a_n], a_n);
|
||
offset += a_n;
|
||
memcpy(&c_data[offset], b.data(), b_n);
|
||
offset += b_n;
|
||
c_data[offset] = 0;
|
||
++offset;
|
||
|
||
c_offsets[i] = offset;
|
||
}
|
||
}
|
||
|
||
static void constant_vector(
|
||
const std::string & a,
|
||
const ColumnString::Chars_t & b_data, const ColumnString::Offsets_t & b_offsets,
|
||
ColumnString::Chars_t & c_data, ColumnString::Offsets_t & c_offsets)
|
||
{
|
||
size_t size = b_offsets.size();
|
||
c_data.resize(b_data.size() + a.size() * size);
|
||
c_offsets.assign(b_offsets);
|
||
|
||
for (size_t i = 0; i < size; ++i)
|
||
c_offsets[i] += a.size() * (i + 1);
|
||
|
||
ColumnString::Offset_t offset = 0;
|
||
ColumnString::Offset_t b_offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
memcpy(&c_data[offset], a.data(), a.size());
|
||
offset += a.size();
|
||
memcpy(&c_data[offset], &b_data[b_offset], b_offsets[i] - b_offset);
|
||
offset += b_offsets[i] - b_offset;
|
||
|
||
b_offset = b_offsets[i];
|
||
}
|
||
}
|
||
|
||
static void constant_fixed_vector(
|
||
const std::string & a,
|
||
const ColumnString::Chars_t & b_data, ColumnString::Offset_t b_n,
|
||
ColumnString::Chars_t & c_data, ColumnString::Offsets_t & c_offsets)
|
||
{
|
||
size_t size = b_data.size() / b_n;
|
||
ColumnString::Offset_t a_n = a.size();
|
||
c_data.resize(size * a_n + b_data.size() + size);
|
||
c_offsets.resize(size);
|
||
|
||
ColumnString::Offset_t offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
memcpy(&c_data[offset], a.data(), a_n);
|
||
offset += a_n;
|
||
memcpy(&c_data[offset], &b_data[i * b_n], b_n);
|
||
offset += b_n;
|
||
c_data[offset] = 0;
|
||
++offset;
|
||
|
||
c_offsets[i] = offset;
|
||
}
|
||
}
|
||
|
||
static void constant_constant(
|
||
const std::string & a,
|
||
const std::string & b,
|
||
std::string & c)
|
||
{
|
||
c = a + b;
|
||
}
|
||
};
|
||
|
||
|
||
template <typename Impl, typename Name>
|
||
class FunctionStringNumNumToString : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = Name::name;
|
||
static IFunction * create(const Context & context) { return new FunctionStringNumNumToString; }
|
||
|
||
/// Получить имя функции.
|
||
String getName() const
|
||
{
|
||
return name;
|
||
}
|
||
|
||
/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnType(const DataTypes & arguments) const
|
||
{
|
||
if (arguments.size() != 3)
|
||
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
|
||
+ toString(arguments.size()) + ", should be 3.",
|
||
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
||
|
||
if (!typeid_cast<const DataTypeString *>(&*arguments[0]) && !typeid_cast<const DataTypeFixedString *>(&*arguments[0]))
|
||
throw Exception("Illegal type " + arguments[0]->getName() + " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
if (!arguments[1]->isNumeric() || !arguments[2]->isNumeric())
|
||
throw Exception("Illegal type " + (arguments[1]->isNumeric() ? arguments[2]->getName() : arguments[1]->getName()) + " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
return new DataTypeString;
|
||
}
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
|
||
{
|
||
const ColumnPtr column_string = block.getByPosition(arguments[0]).column;
|
||
const ColumnPtr column_start = block.getByPosition(arguments[1]).column;
|
||
const ColumnPtr column_length = block.getByPosition(arguments[2]).column;
|
||
|
||
if (!column_start->isConst() || !column_length->isConst())
|
||
throw Exception("2nd and 3rd arguments of function " + getName() + " must be constants.");
|
||
|
||
FieldVisitorConvertToNumber<UInt64> converter;
|
||
Field start_field = (*block.getByPosition(arguments[1]).column)[0];
|
||
Field length_field = (*block.getByPosition(arguments[2]).column)[0];
|
||
UInt64 start = apply_visitor(converter, start_field);
|
||
UInt64 length = apply_visitor(converter, length_field);
|
||
|
||
if (start == 0)
|
||
throw Exception("Second argument of function substring must be greater than 0.", ErrorCodes::ARGUMENT_OUT_OF_BOUND);
|
||
|
||
if (const ColumnString * col = typeid_cast<const ColumnString *>(&*column_string))
|
||
{
|
||
ColumnString * col_res = new ColumnString;
|
||
block.getByPosition(result).column = col_res;
|
||
Impl::vector(col->getChars(), col->getOffsets(),
|
||
start, length,
|
||
col_res->getChars(), col_res->getOffsets());
|
||
}
|
||
else if (const ColumnFixedString * col = typeid_cast<const ColumnFixedString *>(&*column_string))
|
||
{
|
||
ColumnString * col_res = new ColumnString;
|
||
block.getByPosition(result).column = col_res;
|
||
Impl::vector_fixed(col->getChars(), col->getN(),
|
||
start, length,
|
||
col_res->getChars(), col_res->getOffsets());
|
||
}
|
||
else if (const ColumnConstString * col = typeid_cast<const ColumnConstString *>(&*column_string))
|
||
{
|
||
String res;
|
||
Impl::constant(col->getData(), start, length, res);
|
||
ColumnConstString * col_res = new ColumnConstString(col->size(), res);
|
||
block.getByPosition(result).column = col_res;
|
||
}
|
||
else
|
||
throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
|
||
+ " of first argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_COLUMN);
|
||
}
|
||
};
|
||
|
||
|
||
class FunctionAppendTrailingCharIfAbsent : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = "appendTrailingCharIfAbsent";
|
||
static IFunction * create(const Context & context) { return new FunctionAppendTrailingCharIfAbsent; }
|
||
|
||
String getName() const
|
||
{
|
||
return name;
|
||
}
|
||
|
||
private:
|
||
DataTypePtr getReturnType(const DataTypes & arguments) const
|
||
{
|
||
if (arguments.size() != 2)
|
||
throw Exception{
|
||
"Number of arguments for function " + getName() + " doesn't match: passed "
|
||
+ toString(arguments.size()) + ", should be 2.",
|
||
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH
|
||
};
|
||
|
||
if (!typeid_cast<const DataTypeString *>(arguments[0].get()))
|
||
throw Exception{
|
||
"Illegal type " + arguments[0]->getName() + " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT
|
||
};
|
||
|
||
if (!typeid_cast<const DataTypeString *>(arguments[1].get()))
|
||
throw Exception{
|
||
"Illegal type " + arguments[1]->getName() + " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT
|
||
};
|
||
|
||
return new DataTypeString;
|
||
}
|
||
|
||
void execute(Block & block, const ColumnNumbers & arguments, const size_t result)
|
||
{
|
||
const auto & column = block.getByPosition(arguments[0]).column;
|
||
const auto & column_char = block.getByPosition(arguments[1]).column;
|
||
|
||
if (!typeid_cast<const ColumnConstString *>(column_char.get()))
|
||
throw Exception{
|
||
"Second argument of function " + getName() + " must be a constant string",
|
||
ErrorCodes::ILLEGAL_COLUMN
|
||
};
|
||
|
||
const auto & trailing_char_str = static_cast<const ColumnConstString &>(*column_char).getData();
|
||
|
||
if (trailing_char_str.size() != 1)
|
||
throw Exception{
|
||
"Second argument of function " + getName() + " must be a one-character string",
|
||
ErrorCodes::BAD_ARGUMENTS
|
||
};
|
||
|
||
if (const auto col = typeid_cast<const ColumnString *>(&*column))
|
||
{
|
||
auto col_res = new ColumnString;
|
||
block.getByPosition(result).column = col_res;
|
||
|
||
const auto & src_data = col->getChars();
|
||
const auto & src_offsets = col->getOffsets();
|
||
|
||
auto & dst_data = col_res->getChars();
|
||
auto & dst_offsets = col_res->getOffsets();
|
||
|
||
const auto size = src_offsets.size();
|
||
dst_data.resize(src_data.size() + size);
|
||
dst_offsets.resize(size);
|
||
|
||
ColumnString::Offset_t src_offset{};
|
||
ColumnString::Offset_t dst_offset{};
|
||
|
||
for (const auto i : ext::range(0, size))
|
||
{
|
||
const auto src_length = src_offsets[i] - src_offset;
|
||
memcpy(&dst_data[dst_offset], &src_data[src_offset], src_length);
|
||
src_offset = src_offsets[i];
|
||
dst_offset += src_length;
|
||
|
||
if (src_length > 1 && dst_data[dst_offset - 2] != trailing_char_str.front())
|
||
{
|
||
dst_data[dst_offset - 1] = trailing_char_str.front();
|
||
dst_data[dst_offset] = 0;
|
||
++dst_offset;
|
||
}
|
||
|
||
dst_offsets[i] = dst_offset;
|
||
}
|
||
|
||
dst_data.resize_assume_reserved(dst_offset);
|
||
}
|
||
else if (const auto col = typeid_cast<const ColumnConstString *>(&*column))
|
||
{
|
||
const auto & in_data = col->getData();
|
||
|
||
block.getByPosition(result).column = new ColumnConstString{
|
||
col->size(),
|
||
in_data.size() == 0 ? in_data :
|
||
in_data.back() == trailing_char_str.front() ? in_data : in_data + trailing_char_str
|
||
};
|
||
}
|
||
else
|
||
throw Exception{
|
||
"Illegal column " + block.getByPosition(arguments[0]).column->getName()
|
||
+ " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_COLUMN
|
||
};
|
||
}
|
||
};
|
||
|
||
|
||
struct NameEmpty { static constexpr auto name = "empty"; };
|
||
struct NameNotEmpty { static constexpr auto name = "notEmpty"; };
|
||
struct NameLength { static constexpr auto name = "length"; };
|
||
struct NameLengthUTF8 { static constexpr auto name = "lengthUTF8"; };
|
||
struct NameLower { static constexpr auto name = "lower"; };
|
||
struct NameUpper { static constexpr auto name = "upper"; };
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struct NameLowerUTF8 { static constexpr auto name = "lowerUTF8"; };
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struct NameUpperUTF8 { static constexpr auto name = "upperUTF8"; };
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||
struct NameReverse { static constexpr auto name = "reverse"; };
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||
struct NameReverseUTF8 { static constexpr auto name = "reverseUTF8"; };
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||
struct NameSubstring { static constexpr auto name = "substring"; };
|
||
struct NameSubstringUTF8 { static constexpr auto name = "substringUTF8"; };
|
||
|
||
typedef FunctionStringOrArrayToT<EmptyImpl<false>, NameEmpty, UInt8> FunctionEmpty;
|
||
typedef FunctionStringOrArrayToT<EmptyImpl<true>, NameNotEmpty, UInt8> FunctionNotEmpty;
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||
typedef FunctionStringOrArrayToT<LengthImpl, NameLength, UInt64> FunctionLength;
|
||
typedef FunctionStringOrArrayToT<LengthUTF8Impl, NameLengthUTF8, UInt64> FunctionLengthUTF8;
|
||
typedef FunctionStringToString<LowerUpperImpl<tolower>, NameLower> FunctionLower;
|
||
typedef FunctionStringToString<LowerUpperImpl<toupper>, NameUpper> FunctionUpper;
|
||
typedef FunctionStringToString<LowerUpperUTF8Impl<Poco::Unicode::toLower>, NameLowerUTF8> FunctionLowerUTF8;
|
||
typedef FunctionStringToString<LowerUpperUTF8Impl<Poco::Unicode::toUpper>, NameUpperUTF8> FunctionUpperUTF8;
|
||
typedef FunctionStringToString<ReverseImpl, NameReverse> FunctionReverse;
|
||
typedef FunctionStringToString<ReverseUTF8Impl, NameReverseUTF8> FunctionReverseUTF8;
|
||
typedef FunctionStringNumNumToString<SubstringImpl, NameSubstring> FunctionSubstring;
|
||
typedef FunctionStringNumNumToString<SubstringUTF8Impl, NameSubstringUTF8> FunctionSubstringUTF8;
|
||
|
||
|
||
}
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