1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/* -*- 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_numhybrid: public Item_func
{
protected:
Item_result hybrid_type;
public:
Item_func_numhybrid(): Item_func(), hybrid_type(REAL_RESULT)
{}
Item_func_numhybrid(Item *a) :Item_func(a), hybrid_type(REAL_RESULT)
{}
Item_func_numhybrid(Item *a,Item *b)
:Item_func(a,b), hybrid_type(REAL_RESULT)
{}
Item_func_numhybrid(List<Item> &list)
:Item_func(list), hybrid_type(REAL_RESULT)
{}
enum Item_result result_type () const { return hybrid_type; }
void fix_length_and_dec();
void fix_num_length_and_dec();
virtual void find_num_type()= 0; /* To be called from fix_length_and_dec */
double val_real();
int64_t val_int();
type::Decimal *val_decimal(type::Decimal *);
String *val_str(String*str);
/**
@brief Performs the operation that this functions implements when the
result type is INT.
@return The result of the operation.
*/
virtual int64_t int_op()= 0;
/**
@brief Performs the operation that this functions implements when the
result type is REAL.
@return The result of the operation.
*/
virtual double real_op()= 0;
/**
@brief Performs the operation that this functions implements when the
result type is DECIMAL.
@param A pointer where the DECIMAL value will be allocated.
@return
- 0 If the result is NULL
- The same pointer it was given, with the area initialized to the
result of the operation.
*/
virtual type::Decimal *decimal_op(type::Decimal *)= 0;
/**
@brief Performs the operation that this functions implements when the
result type is a string type.
@return The result of the operation.
*/
virtual String *str_op(String *)= 0;
bool is_null() { update_null_value(); return null_value; }
};
} /* namespace drizzled */
|