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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/* -*- 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/charset.h>
#include <drizzled/field.h>
#include <drizzled/function/str/strfunc.h>
#include <drizzled/temporal.h>
namespace drizzled {
class Item_typecast : public Item_str_func
{
public:
using Item_func::tmp_table_field;
Item_typecast(Item *a) :Item_str_func(a) {}
String *val_str(String *a)
{
assert(fixed == 1);
String *tmp=args[0]->val_str(a);
null_value=args[0]->null_value;
if (tmp)
tmp->set_charset(collation.collation);
return tmp;
}
void fix_length_and_dec()
{
collation.set(&my_charset_bin);
max_length=args[0]->max_length;
}
virtual const char* cast_type() const= 0;
virtual void print(String *str);
};
class Item_typecast_maybe_null :public Item_typecast
{
public:
Item_typecast_maybe_null(Item *a) :Item_typecast(a) {}
void fix_length_and_dec()
{
collation.set(&my_charset_bin);
max_length=args[0]->max_length;
maybe_null= 1;
}
};
class Item_char_typecast :public Item_typecast
{
int cast_length;
const charset_info_st *cast_cs, *from_cs;
bool charset_conversion;
String tmp_value;
public:
using Item_func::tmp_table_field;
Item_char_typecast(Item *a, int length_arg, const charset_info_st * const cs_arg)
:Item_typecast(a), cast_length(length_arg), cast_cs(cs_arg) {}
enum Functype functype() const { return CHAR_TYPECAST_FUNC; }
bool eq(const Item *item, bool binary_cmp) const;
const char *func_name() const { return "cast_as_char"; }
const char* cast_type() const { return "char"; }
String *val_str(String *a);
void fix_length_and_dec();
virtual void print(String *str);
};
class Item_date_typecast :public Item_typecast_maybe_null
{
public:
using Item_func::tmp_table_field;
Item_date_typecast(Item *a) :
Item_typecast_maybe_null(a)
{}
const char *func_name() const { return "cast_as_date"; }
String *val_str(String *str);
bool get_date(type::Time <ime, uint32_t fuzzy_date);
bool get_time(type::Time <ime);
const char *cast_type() const { return "date"; }
enum_field_types field_type() const { return DRIZZLE_TYPE_DATE; }
Field *tmp_table_field(Table *table)
{
return tmp_table_field_from_field_type(table, 0);
}
void fix_length_and_dec()
{
collation.set(&my_charset_bin);
max_length= 10;
maybe_null= 1;
}
bool result_as_int64_t() { return true; }
int64_t val_int();
double val_real() { return (double) val_int(); }
type::Decimal *val_decimal(type::Decimal *decimal_value)
{
assert(fixed == 1);
return val_decimal_from_date(decimal_value);
}
int save_in_field(Field *field, bool )
{
return save_date_in_field(field);
}
};
class Item_datetime_typecast :public Item_typecast_maybe_null
{
public:
using Item_func::tmp_table_field;
Item_datetime_typecast(Item *a) :Item_typecast_maybe_null(a) {}
const char *func_name() const { return "cast_as_datetime"; }
String *val_str(String *str);
const char *cast_type() const { return "datetime"; }
enum_field_types field_type() const { return DRIZZLE_TYPE_DATETIME; }
Field *tmp_table_field(Table *table)
{
return tmp_table_field_from_field_type(table, 0);
}
void fix_length_and_dec()
{
collation.set(&my_charset_bin);
maybe_null= 1;
max_length= DateTime::MAX_STRING_LENGTH * MY_CHARSET_BIN_MB_MAXLEN;
decimals= DATETIME_DEC;
}
bool result_as_int64_t()
{
return true;
}
int64_t val_int();
double val_real()
{
return val_real_from_decimal();
}
double val()
{
return (double) val_int();
}
type::Decimal *val_decimal(type::Decimal *decimal_value)
{
assert(fixed == 1);
return val_decimal_from_date(decimal_value);
}
int save_in_field(Field *field, bool )
{
return save_date_in_field(field);
}
};
} /* namespace drizzled */
|