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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
*/
#pragma once
#include <drizzled/function/func.h>
namespace drizzled
{
class Item_func_min_max :public Item_func
{
Item_result cmp_type;
String tmp_value;
int cmp_sign;
/* TRUE <=> arguments should be compared in the DATETIME context. */
bool compare_as_dates;
/* An item used for issuing warnings while string to DATETIME conversion. */
Item *datetime_item;
protected:
enum_field_types cached_field_type;
public:
Item_func_min_max(List<Item> &list,int cmp_sign_arg) :Item_func(list),
cmp_type(INT_RESULT), cmp_sign(cmp_sign_arg), compare_as_dates(false),
datetime_item(0) {}
double val_real();
int64_t val_int();
String *val_str(String *);
type::Decimal *val_decimal(type::Decimal *);
void fix_length_and_dec();
enum Item_result result_type () const { return cmp_type; }
bool result_as_int64_t() { return compare_as_dates; };
uint32_t cmp_datetimes(uint64_t *value);
enum_field_types field_type() const { return cached_field_type; }
};
class Item_func_min :public Item_func_min_max
{
public:
Item_func_min(List<Item> &list) :Item_func_min_max(list,1) {}
const char *func_name() const { return "least"; }
};
class Item_func_max :public Item_func_min_max
{
public:
Item_func_max(List<Item> &list) :Item_func_min_max(list,-1) {}
const char *func_name() const { return "greatest"; }
};
} /* namespace drizzled */
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