Drizzled Public API Documentation

minus.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; version 2 of the License.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #include <config.h>
21 
22 #include <drizzled/function/math/minus.h>
23 #include <drizzled/type/decimal.h>
24 
25 namespace drizzled
26 {
27 
34 {
35  Item_num_op::fix_length_and_dec();
36  if (unsigned_flag)
37  unsigned_flag= 0;
38 }
39 
40 
42 {
43  double value= args[0]->val_real() - args[1]->val_real();
44  if ((null_value=args[0]->null_value || args[1]->null_value))
45  return 0.0;
46  return fix_result(value);
47 }
48 
49 
51 {
52  int64_t value=args[0]->val_int() - args[1]->val_int();
53  if ((null_value=args[0]->null_value || args[1]->null_value))
54  return 0;
55  return value;
56 }
57 
63 {
64  type::Decimal value1, *val1;
65  type::Decimal value2, *val2=
66 
67  val1= args[0]->val_decimal(&value1);
68  if ((null_value= args[0]->null_value))
69  return 0;
70  val2= args[1]->val_decimal(&value2);
71  if (!(null_value= (args[1]->null_value ||
72  (class_decimal_sub(E_DEC_FATAL_ERROR, decimal_value, val1,
73  val2) > 3))))
74  return decimal_value;
75  return 0;
76 }
77 
78 } /* namespace drizzled */
virtual int64_t val_int()=0
TODO: Rename this file - func.h is stupid.
bool null_value
Definition: item.h:122
double real_op()
Performs the operation that this functions implements when the result type is REAL.
Definition: minus.cc:41
type::Decimal * decimal_op(type::Decimal *)
Definition: minus.cc:62
virtual double val_real()=0
int64_t int_op()
Performs the operation that this functions implements when the result type is INT.
Definition: minus.cc:50
virtual type::Decimal * val_decimal(type::Decimal *decimal_buffer)=0