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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems
*
* 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; version 2 of the License.
*
* 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 <drizzled/error.h>
#include <drizzled/table.h>
#include <drizzled/session.h>
#include <drizzled/item/cache_row.h>
namespace drizzled
{
void Item_cache_row::make_field(SendField *)
{
illegal_method_call((const char*)"make_field");
}
double Item_cache_row::val_real()
{
illegal_method_call((const char*)"val");
return 0;
}
int64_t Item_cache_row::val_int()
{
illegal_method_call((const char*)"val_int");
return 0;
}
String *Item_cache_row::val_str(String *)
{
illegal_method_call((const char*)"val_str");
return 0;
}
my_decimal *Item_cache_row::val_decimal(my_decimal *)
{
illegal_method_call((const char*)"val_decimal");
return 0;
}
enum Item_result Item_cache_row::result_type() const
{
return ROW_RESULT;
}
uint32_t Item_cache_row::cols()
{
return item_count;
}
Item *Item_cache_row::element_index(uint32_t i)
{
return values[i];
}
Item **Item_cache_row::addr(uint32_t i)
{
return (Item **) (values + i);
}
bool Item_cache_row::allocate(uint32_t num)
{
item_count= num;
Session *session= current_session;
return (!(values=
(Item_cache **) session->calloc(sizeof(Item_cache *)*item_count)));
}
bool Item_cache_row::setup(Item * item)
{
example= item;
if (!values && allocate(item->cols()))
return 1;
for (uint32_t i= 0; i < item_count; i++)
{
Item *el= item->element_index(i);
Item_cache *tmp;
if (!(tmp= values[i]= Item_cache::get_cache(el)))
return 1;
tmp->setup(el);
}
return 0;
}
void Item_cache_row::store(Item * item)
{
null_value= 0;
item->bring_value();
for (uint32_t i= 0; i < item_count; i++)
{
values[i]->store(item->element_index(i));
null_value|= values[i]->null_value;
}
}
void Item_cache_row::illegal_method_call(const char *)
{
assert(0);
my_error(ER_OPERAND_COLUMNS, MYF(0), 1);
return;
}
bool Item_cache_row::check_cols(uint32_t c)
{
if (c != item_count)
{
my_error(ER_OPERAND_COLUMNS, MYF(0), c);
return 1;
}
return 0;
}
bool Item_cache_row::null_inside()
{
for (uint32_t i= 0; i < item_count; i++)
{
if (values[i]->cols() > 1)
{
if (values[i]->null_inside())
return 1;
}
else
{
values[i]->update_null_value();
if (values[i]->null_value)
return 1;
}
}
return 0;
}
void Item_cache_row::bring_value()
{
for (uint32_t i= 0; i < item_count; i++)
values[i]->bring_value();
return;
}
void Item_cache_row::keep_array()
{
save_array= 1;
}
void Item_cache_row::cleanup()
{
Item_cache::cleanup();
if (save_array)
memset(values, 0, item_count*sizeof(Item**));
else
values= 0;
return;
}
} /* namespace drizzled */
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