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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2010 Brian Aker
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "plugin/table_cache_dictionary/dictionary.h"
#include "drizzled/pthread_globals.h"
#include "drizzled/my_hash.h"
using namespace drizzled;
using namespace std;
table_cache_dictionary::TableCache::TableCache() :
plugin::TableFunction("DATA_DICTIONARY", "TABLE_CACHE")
{
add_field("SESSION_ID", plugin::TableFunction::NUMBER);
add_field("TABLE_SCHEMA");
add_field("TABLE_NAME");
add_field("VERSION", plugin::TableFunction::NUMBER);
add_field("IS_NAME_LOCKED", plugin::TableFunction::BOOLEAN);
add_field("ROWS", plugin::TableFunction::NUMBER);
add_field("AVG_ROW_LENGTH", plugin::TableFunction::NUMBER);
add_field("TABLE_SIZE", plugin::TableFunction::NUMBER);
add_field("AUTO_INCREMENT", plugin::TableFunction::NUMBER);
}
table_cache_dictionary::TableCache::Generator::Generator(drizzled::Field **arg) :
drizzled::plugin::TableFunction::Generator(arg),
is_primed(false)
{
pthread_mutex_lock(&LOCK_open); /* Optionally lock for remove tables from open_cahe if not in use */
drizzled::HASH *open_cache=
get_open_cache();
for (uint32_t idx= 0; idx < open_cache->records; idx++ )
{
table= (Table*) hash_element(open_cache, idx);
table_list.push_back(table);
}
std::sort(table_list.begin(), table_list.end(), Table::compare);
}
table_cache_dictionary::TableCache::Generator::~Generator()
{
pthread_mutex_unlock(&LOCK_open); /* Optionally lock for remove tables from open_cahe if not in use */
}
bool table_cache_dictionary::TableCache::Generator::nextCore()
{
if (is_primed)
{
table_list_iterator++;
}
else
{
is_primed= true;
table_list_iterator= table_list.begin();
}
if (table_list_iterator == table_list.end())
return false;
table= *table_list_iterator;
return true;
}
bool table_cache_dictionary::TableCache::Generator::next()
{
while (not nextCore())
{
if (table_list_iterator != table_list.end())
continue;
return false;
}
return true;
}
bool table_cache_dictionary::TableCache::Generator::populate()
{
if (not next())
return false;
fill();
return true;
}
void table_cache_dictionary::TableCache::Generator::fill()
{
/**
For test cases use:
--replace_column 1 # 4 # 5 # 6 # 8 # 9 #
*/
/* SESSION_ID 1 */
if (table->getSession())
push(table->getSession()->getSessionId());
else
push(static_cast<int64_t>(0));
/* TABLE_SCHEMA 2 */
string arg;
push(table->getShare()->getSchemaName(arg));
/* TABLE_NAME 3 */
push(table->getShare()->getTableName(arg));
/* VERSION 4 */
push(static_cast<int64_t>(table->getShare()->version));
/* IS_NAME_LOCKED 5 */
push(table->getShare()->isNameLock());
/* ROWS 6 */
push(static_cast<uint64_t>(table->getCursor().records()));
/* AVG_ROW_LENGTH 7 */
push(table->getCursor().rowSize());
/* TABLE_SIZE 8 */
push(table->getCursor().tableSize());
/* AUTO_INCREMENT 9 */
push(table->getCursor().getNextInsertId());
}
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