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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
*/
#ifndef DRIZZLED_FUNCTION_ROLLUP_CONST_H
#define DRIZZLED_FUNCTION_ROLLUP_CONST_H
#include <drizzled/function/func.h>
/*
Objects of this class are used for ROLLUP queries to wrap up
each constant item referred to in GROUP BY list.
*/
class Item_func_rollup_const :public Item_func
{
public:
Item_func_rollup_const(Item *a) :Item_func(a)
{
name= a->name;
name_length= a->name_length;
}
double val_real() { return args[0]->val_real(); }
int64_t val_int() { return args[0]->val_int(); }
String *val_str(String *str) { return args[0]->val_str(str); }
my_decimal *val_decimal(my_decimal *dec) { return args[0]->val_decimal(dec); }
const char *func_name() const { return "rollup_const"; }
bool const_item() const { return 0; }
Item_result result_type() const { return args[0]->result_type(); }
void fix_length_and_dec()
{
collation= args[0]->collation;
max_length= args[0]->max_length;
decimals=args[0]->decimals;
/* The item could be a NULL constant. */
null_value= args[0]->is_null();
}
};
#endif /* DRIZZLED_FUNCTION_ROLLUP_CONST_H */
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