2012-09-17 04:34:19 +00:00
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#pragma once
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#include <DB/DataTypes/DataTypeString.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/ColumnConst.h>
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#include <DB/Columns/ColumnArray.h>
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#include <DB/Functions/IFunction.h>
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2013-08-02 13:09:42 +00:00
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#include <DB/Functions/FunctionsStringSearch.h>
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2012-09-17 04:34:19 +00:00
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namespace DB
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{
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/** Функции, разделяющие строки на массив строк или наоборот.
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*
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2012-09-23 05:28:59 +00:00
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* splitByChar(sep, s)
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* splitByString(sep, s)
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* splitByRegexp(regexp, s)
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*
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2013-08-07 11:25:02 +00:00
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* extractAll(s, regexp) - выделить из строки подпоследовательности, соответствующие регекспу.
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2013-08-02 16:31:23 +00:00
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* - первый subpattern, если в regexp-е есть subpattern;
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* - нулевой subpattern (сматчившуюся часть, иначе);
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* - инача, пустой массив
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*
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2012-09-17 04:34:19 +00:00
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* join(sep, arr)
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* join(arr)
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2012-09-23 05:28:59 +00:00
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*
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2012-09-22 07:30:40 +00:00
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* alphaTokens(s) - выделить из строки подпоследовательности [a-zA-Z]+.
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2012-09-17 04:34:19 +00:00
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*
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* Функции работы с URL расположены отдельно.
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*/
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typedef const char * Pos;
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2012-09-23 05:28:59 +00:00
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/// Генераторы подстрок. Все они обладают общим интерфейсом.
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class AlphaTokensImpl
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2012-09-17 04:34:19 +00:00
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{
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2012-09-23 05:28:59 +00:00
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private:
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Pos pos;
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Pos end;
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public:
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/// Получить имя фукнции.
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static String getName() { return "alphaTokens"; }
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/// Проверить типы агрументов функции.
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static void checkArguments(const DataTypes & arguments)
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{
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if (arguments.size() != 1)
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throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
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2013-06-21 20:34:19 +00:00
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+ toString(arguments.size()) + ", should be 1.",
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2012-09-23 05:28:59 +00:00
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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2012-09-17 04:34:19 +00:00
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2012-09-23 05:28:59 +00:00
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if (!dynamic_cast<const DataTypeString *>(&*arguments[0]))
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throw Exception("Illegal type " + arguments[0]->getName() + " of first argument of function " + getName() + ". Must be String.",
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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}
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/// Инициализировать по аргументам функции.
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void init(Block & block, const ColumnNumbers & arguments) {}
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2012-09-17 04:34:19 +00:00
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2012-09-23 05:28:59 +00:00
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/// Вызывается для каждой следующей строки.
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void set(Pos pos_, Pos end_)
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{
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pos = pos_;
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end = end_;
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}
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2012-09-17 04:34:19 +00:00
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2013-08-07 11:25:02 +00:00
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/// Возвращает позицию аргумента, являющегося столбцом строк
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size_t getStringsArgumentPosition()
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{
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return 0;
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}
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2012-09-23 05:28:59 +00:00
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/// Получить следующий токен, если есть, или вернуть false.
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bool get(Pos & token_begin, Pos & token_end)
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{
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/// Пропускаем мусор
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while (pos < end && !((*pos >= 'a' && *pos <= 'z') || (*pos >= 'A' && *pos <= 'Z')))
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++pos;
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2012-09-17 04:34:19 +00:00
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2012-09-23 05:28:59 +00:00
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if (pos == end)
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return false;
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2012-09-17 04:34:19 +00:00
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2012-09-23 05:28:59 +00:00
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token_begin = pos;
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while (pos < end && ((*pos >= 'a' && *pos <= 'z') || (*pos >= 'A' && *pos <= 'Z')))
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++pos;
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token_end = pos;
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return true;
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}
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};
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2012-09-17 04:34:19 +00:00
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2012-09-23 05:28:59 +00:00
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class SplitByCharImpl
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2012-09-17 04:34:19 +00:00
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{
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2012-09-23 05:28:59 +00:00
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private:
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Pos pos;
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Pos end;
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char sep;
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2012-09-17 04:34:19 +00:00
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public:
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2012-09-23 05:28:59 +00:00
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static String getName() { return "splitByChar"; }
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2012-09-17 04:34:19 +00:00
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2012-09-23 05:28:59 +00:00
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static void checkArguments(const DataTypes & arguments)
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2012-09-17 04:34:19 +00:00
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{
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2012-09-23 05:28:59 +00:00
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if (arguments.size() != 2)
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2012-09-17 04:34:19 +00:00
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throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
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2013-06-21 20:34:19 +00:00
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+ toString(arguments.size()) + ", should be 2.",
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2012-09-17 04:34:19 +00:00
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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if (!dynamic_cast<const DataTypeString *>(&*arguments[0]))
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throw Exception("Illegal type " + arguments[0]->getName() + " of first argument of function " + getName() + ". Must be String.",
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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2012-09-23 05:28:59 +00:00
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if (!dynamic_cast<const DataTypeString *>(&*arguments[1]))
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throw Exception("Illegal type " + arguments[1]->getName() + " of second argument of function " + getName() + ". Must be String.",
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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}
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void init(Block & block, const ColumnNumbers & arguments)
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{
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const ColumnConstString * col = dynamic_cast<const ColumnConstString *>(&*block.getByPosition(arguments[0]).column);
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if (!col)
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throw Exception("Illegal column " + col->getName() + " of first argument of function " + getName() + ". Must be constant string.",
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ErrorCodes::ILLEGAL_COLUMN);
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const String & sep_str = col->getData();
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if (sep_str.size() != 1)
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throw Exception("Illegal separator for function " + getName() + ". Must be exactly one byte.");
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sep = sep_str[0];
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}
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2013-08-07 11:25:02 +00:00
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/// Возвращает позицию аргумента, являющегося столбцом строк
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size_t getStringsArgumentPosition()
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{
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return 1;
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}
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2012-09-23 05:28:59 +00:00
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void set(Pos pos_, Pos end_)
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{
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pos = pos_;
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end = end_;
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}
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bool get(Pos & token_begin, Pos & token_end)
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{
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if (!pos)
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return false;
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token_begin = pos;
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pos = reinterpret_cast<Pos>(memchr(pos, sep, end - pos));
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if (pos)
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{
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token_end = pos;
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++pos;
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}
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else
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token_end = end;
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return true;
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}
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};
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class SplitByStringImpl
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{
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private:
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Pos pos;
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Pos end;
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String sep;
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public:
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static String getName() { return "splitByString"; }
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static void checkArguments(const DataTypes & arguments)
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{
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SplitByCharImpl::checkArguments(arguments);
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}
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void init(Block & block, const ColumnNumbers & arguments)
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{
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const ColumnConstString * col = dynamic_cast<const ColumnConstString *>(&*block.getByPosition(arguments[0]).column);
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if (!col)
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throw Exception("Illegal column " + col->getName() + " of first argument of function " + getName() + ". Must be constant string.",
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ErrorCodes::ILLEGAL_COLUMN);
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sep = col->getData();
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}
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2013-08-07 11:25:02 +00:00
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/// Возвращает позицию аргумента, являющегося столбцом строк
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size_t getStringsArgumentPosition()
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{
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return 1;
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}
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2012-09-23 05:28:59 +00:00
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/// Вызывается для каждой следующей строки.
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void set(Pos pos_, Pos end_)
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{
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pos = pos_;
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end = end_;
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}
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/// Получить следующий токен, если есть, или вернуть false.
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bool get(Pos & token_begin, Pos & token_end)
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{
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if (!pos)
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return false;
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token_begin = pos;
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pos = reinterpret_cast<Pos>(memmem(pos, end - pos, sep.data(), sep.size()));
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if (pos)
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{
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token_end = pos;
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pos += sep.size();
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}
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else
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token_end = end;
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return true;
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}
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};
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2013-08-05 08:40:56 +00:00
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class ExtractAllImpl
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2013-08-02 13:09:42 +00:00
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{
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private:
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const OptimizedRegularExpression *re;
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OptimizedRegularExpression::MatchVec matches;
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2013-08-02 16:31:23 +00:00
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size_t capture;
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2013-08-02 13:09:42 +00:00
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Pos pos;
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Pos end;
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public:
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2013-08-05 08:40:56 +00:00
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ExtractAllImpl():re(NULL) { }
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2013-08-02 13:09:42 +00:00
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/// Получить имя функции.
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static String getName() { return "extractAll"; }
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/// Проверить типы агрументов функции.
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static void checkArguments( const DataTypes & arguments )
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{
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SplitByStringImpl::checkArguments(arguments);
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}
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/// Инициализировать по аргументам функции.
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void init(Block & block, const ColumnNumbers & arguments)
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{
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2013-08-07 11:25:02 +00:00
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const ColumnConstString * col = dynamic_cast<const ColumnConstString *>(&*block.getByPosition(arguments[1]).column);
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2013-08-02 13:09:42 +00:00
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if (!col)
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throw Exception("Illegal column " + col->getName() + " of first argument of function " + getName() + ". Must be constant string.",
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ErrorCodes::ILLEGAL_COLUMN);
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2013-08-02 16:31:23 +00:00
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re = &Regexps::get(col->getData());
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capture = re->getNumberOfSubpatterns() > 0 ? 1 : 0;
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2013-08-05 08:40:56 +00:00
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matches.resize(capture + 1);
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2013-08-02 13:09:42 +00:00
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}
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2013-08-07 11:25:02 +00:00
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/// Возвращает позицию аргумента, являющегося столбцом строк
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size_t getStringsArgumentPosition()
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{
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return 0;
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}
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2013-08-02 13:09:42 +00:00
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/// Вызывается для каждой следующей строки.
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void set(Pos pos_, Pos end_)
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{
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pos = pos_;
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end = end_;
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}
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/// Получить следующий токен, если есть, или вернуть false.
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bool get(Pos & token_begin, Pos & token_end)
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{
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2013-08-05 08:40:56 +00:00
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if (!pos || pos > end)
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2013-08-02 13:09:42 +00:00
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return false;
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2013-08-05 08:40:56 +00:00
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if (!re->match(pos, end - pos, matches))
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2013-08-02 16:31:23 +00:00
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return false;
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2013-08-02 13:09:42 +00:00
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2013-08-05 08:40:56 +00:00
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token_begin = pos + matches[capture].offset;
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token_end = token_begin + matches[capture].length;
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2013-08-02 13:09:42 +00:00
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2013-08-07 11:25:02 +00:00
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pos += matches[capture].offset + matches[capture].length;
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2013-08-02 13:09:42 +00:00
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return true;
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}
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};
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2012-09-23 05:28:59 +00:00
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/// Функция, принимающая строку, и возвращающая массив подстрок, создаваемый некоторым генератором.
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template <typename Generator>
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class FunctionTokens : public IFunction
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{
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public:
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/// Получить имя функции.
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String getName() const
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{
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return Generator::getName();
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}
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/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
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DataTypePtr getReturnType(const DataTypes & arguments) const
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{
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2013-03-26 19:30:23 +00:00
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Generator::checkArguments(arguments);
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2012-09-23 05:28:59 +00:00
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2012-09-17 04:34:19 +00:00
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return new DataTypeArray(new DataTypeString);
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}
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/// Выполнить функцию над блоком.
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void execute(Block & block, const ColumnNumbers & arguments, size_t result)
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{
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2013-03-26 19:30:23 +00:00
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Generator generator;
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2012-09-23 05:28:59 +00:00
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generator.init(block, arguments);
|
2013-08-07 11:25:02 +00:00
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size_t arrayArgumentPosition = arguments[generator.getStringsArgumentPosition()];
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2012-09-23 05:28:59 +00:00
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2013-08-07 11:25:02 +00:00
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const ColumnString * col_str = dynamic_cast<const ColumnString *>(&*block.getByPosition(arrayArgumentPosition).column);
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const ColumnConstString * col_const_str =
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dynamic_cast<const ColumnConstString *>(&*block.getByPosition(arrayArgumentPosition).column);
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2012-09-17 04:34:19 +00:00
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ColumnArray * col_res = new ColumnArray(new ColumnString);
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ColumnString & res_strings = dynamic_cast<ColumnString &>(col_res->getData());
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ColumnArray::Offsets_t & res_offsets = col_res->getOffsets();
|
2013-05-05 15:25:25 +00:00
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ColumnString::Chars_t & res_strings_chars = res_strings.getChars();
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2012-09-17 04:34:19 +00:00
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ColumnString::Offsets_t & res_strings_offsets = res_strings.getOffsets();
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if (col_str)
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{
|
2013-05-05 15:25:25 +00:00
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const ColumnString::Chars_t & src_chars = col_str->getChars();
|
2012-09-17 04:34:19 +00:00
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const ColumnString::Offsets_t & src_offsets = col_str->getOffsets();
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res_offsets.reserve(src_offsets.size());
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res_strings_offsets.reserve(src_offsets.size() * 5); /// Константа 5 - наугад.
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res_strings_chars.reserve(src_chars.size());
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Pos token_begin = NULL;
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Pos token_end = NULL;
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size_t size = src_offsets.size();
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ColumnString::Offset_t current_src_offset = 0;
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ColumnArray::Offset_t current_dst_offset = 0;
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ColumnString::Offset_t current_dst_strings_offset = 0;
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|
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for (size_t i = 0; i < size; ++i)
|
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|
|
|
{
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|
|
Pos pos = reinterpret_cast<Pos>(&src_chars[current_src_offset]);
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|
|
current_src_offset = src_offsets[i];
|
2012-09-23 05:28:59 +00:00
|
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|
|
Pos end = reinterpret_cast<Pos>(&src_chars[current_src_offset]) - 1;
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|
|
generator.set(pos, end);
|
2012-09-17 04:34:19 +00:00
|
|
|
|
|
|
|
|
|
size_t j = 0;
|
2012-09-23 05:28:59 +00:00
|
|
|
|
while (generator.get(token_begin, token_end))
|
2012-09-17 04:34:19 +00:00
|
|
|
|
{
|
|
|
|
|
size_t token_size = token_end - token_begin;
|
|
|
|
|
|
|
|
|
|
res_strings_chars.resize(res_strings_chars.size() + token_size + 1);
|
|
|
|
|
memcpy(&res_strings_chars[current_dst_strings_offset], token_begin, token_size);
|
|
|
|
|
/// Нулевой байт после токена и так инициализирован std::vector-ом.
|
|
|
|
|
|
|
|
|
|
current_dst_strings_offset += token_size + 1;
|
|
|
|
|
res_strings_offsets.push_back(current_dst_strings_offset);
|
|
|
|
|
++j;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
current_dst_offset += j;
|
|
|
|
|
res_offsets.push_back(current_dst_offset);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
block.getByPosition(result).column = col_res;
|
|
|
|
|
}
|
|
|
|
|
else if (col_const_str)
|
|
|
|
|
{
|
|
|
|
|
String src = col_const_str->getData();
|
|
|
|
|
Array dst;
|
|
|
|
|
|
2012-09-23 05:28:59 +00:00
|
|
|
|
generator.set(src.data(), src.data() + src.size());
|
2012-09-17 04:34:19 +00:00
|
|
|
|
Pos token_begin = NULL;
|
|
|
|
|
Pos token_end = NULL;
|
|
|
|
|
|
2012-09-23 05:28:59 +00:00
|
|
|
|
while (generator.get(token_begin, token_end))
|
2012-09-17 04:34:19 +00:00
|
|
|
|
dst.push_back(String(token_begin, token_end - token_begin));
|
|
|
|
|
|
2013-03-27 10:07:23 +00:00
|
|
|
|
block.getByPosition(result).column = new ColumnConstArray(col_const_str->size(), dst, new DataTypeArray(new DataTypeString));
|
2012-09-17 04:34:19 +00:00
|
|
|
|
}
|
|
|
|
|
else
|
2013-08-07 11:25:02 +00:00
|
|
|
|
throw Exception("Illegal columns " + block.getByPosition(arrayArgumentPosition).column->getName()
|
|
|
|
|
+ ", " + block.getByPosition(arrayArgumentPosition).column->getName()
|
2012-09-17 04:34:19 +00:00
|
|
|
|
+ " of arguments of function " + getName(),
|
|
|
|
|
ErrorCodes::ILLEGAL_COLUMN);
|
|
|
|
|
}
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
2013-03-06 13:44:40 +00:00
|
|
|
|
typedef FunctionTokens<AlphaTokensImpl> FunctionAlphaTokens;
|
|
|
|
|
typedef FunctionTokens<SplitByCharImpl> FunctionSplitByChar;
|
2012-09-23 05:28:59 +00:00
|
|
|
|
typedef FunctionTokens<SplitByStringImpl> FunctionSplitByString;
|
2013-08-05 08:40:56 +00:00
|
|
|
|
typedef FunctionTokens<ExtractAllImpl> FunctionExtractAll;
|
2012-09-23 05:28:59 +00:00
|
|
|
|
|
2012-09-17 04:34:19 +00:00
|
|
|
|
}
|