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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, Inc.
*
* 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/item/cache_str.h>
#include <drizzled/field.h>
namespace drizzled {
Item_cache_str::Item_cache_str(const Item *item) :
Item_cache(), value(0),
is_varbinary(item->type() == FIELD_ITEM &&
((const Item_field *) item)->field->type() ==
DRIZZLE_TYPE_VARCHAR &&
!((const Item_field *) item)->field->has_charset())
{}
void Item_cache_str::store(Item *item)
{
value_buff.set(buffer, sizeof(buffer), item->collation.collation);
value= item->str_result(&value_buff);
if ((null_value= item->null_value))
value= 0;
else if (value != &value_buff)
{
/*
We copy string value to avoid changing value if 'item' is table field
in queries like following (where t1.c is varchar):
select a,
(select a,b,c from t1 where t1.a=t2.a) = ROW(a,2,'a'),
(select c from t1 where a=t2.a)
from t2;
*/
value_buff.copy(*value);
value= &value_buff;
}
}
double Item_cache_str::val_real()
{
assert(fixed == 1);
int err_not_used;
char *end_not_used;
if (value)
return my_strntod(value->charset(), (char*) value->ptr(),
value->length(), &end_not_used, &err_not_used);
return (double) 0;
}
int64_t Item_cache_str::val_int()
{
assert(fixed == 1);
int err;
if (value)
return my_strntoll(value->charset(), value->ptr(),
value->length(), 10, (char**) 0, &err);
else
return 0;
}
type::Decimal *Item_cache_str::val_decimal(type::Decimal *decimal_val)
{
assert(fixed == 1);
if (value)
decimal_val->store(E_DEC_FATAL_ERROR, value);
else
decimal_val= 0;
return decimal_val;
}
int Item_cache_str::save_in_field(Field *field, bool no_conversions)
{
return Item_cache::save_in_field(field, no_conversions);
}
} /* namespace drizzled */
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