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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2010 Brian Aker
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include "plugin/utility_dictionary/dictionary.h"
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#include <drizzled/atomics.h>
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#include <drizzled/session.h>
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using namespace drizzled;
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#define LARGEST_RANDOM_STRING 512
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static const char ALPHANUMERICS[]=
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"0123456789ABCDEFGHIJKLMNOPQRSTWXYZabcdefghijklmnopqrstuvwxyz";
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#define ALPHANUMERICS_SIZE (sizeof(ALPHANUMERICS)-1)
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static size_t get_alpha_num(void)
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return (size_t)random() % ALPHANUMERICS_SIZE;
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utility_dictionary::RandomString::RandomString() :
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plugin::TableFunction("DATA_DICTIONARY", "RANDOM_STRING")
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add_field("VALUE", plugin::TableFunction::STRING, LARGEST_RANDOM_STRING, false);
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bool utility_dictionary::RandomString::Generator::populate()
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if (getSession().getLex()->isSumExprUsed() && count > 0)
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if (getSession().getLex()->current_select->group_list.elements && count > 0)
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if (getSession().getLex()->current_select->explicit_limit or count == 0)
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uint32_t random_char_number= random() % LARGEST_RANDOM_STRING;
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char buffer[LARGEST_RANDOM_STRING];
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for (uint32_t x= 0; x < random_char_number; x++)
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buffer[x]= ALPHANUMERICS[get_alpha_num()];
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buffer[random_char_number]= 0;
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push(buffer, random_char_number);