1
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
4
* Copyright (C) 2008 Sun Microsystems, Inc.
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.
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.
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
20
#ifndef DRIZZLED_FUNCTION_TIME_DATE_H
21
#define DRIZZLED_FUNCTION_TIME_DATE_H
23
#include <drizzled/function/func.h>
24
#include <drizzled/function/str/strfunc.h>
25
#include <drizzled/temporal.h>
30
/* A function which evaluates to a Date */
31
class Item_date :public Item_func
34
using Item_func::tmp_table_field;
36
Item_date() :Item_func() {}
37
Item_date(Item *a) :Item_func(a) {}
38
enum Item_result result_type () const { return STRING_RESULT; }
39
enum_field_types field_type() const { return DRIZZLE_TYPE_DATE; }
40
String *val_str(String *str);
42
double val_real() { return val_real_from_decimal(); }
43
const char *func_name() const { return "date"; }
44
void fix_length_and_dec()
46
collation.set(&my_charset_bin);
48
max_length=Date::MAX_STRING_LENGTH*MY_CHARSET_BIN_MB_MAXLEN;
51
* All functions which inherit from Item_date must implement
52
* their own get_temporal() method, which takes a supplied
53
* Date reference and populates it with a correct
54
* date based on the semantics of the function.
56
* Returns whether the function was able to correctly fill
57
* the supplied date temporal with a proper date.
59
* @param Reference to a Date to populate
61
virtual bool get_temporal(Date &temporal)= 0;
62
Field *tmp_table_field(Table *table)
64
return tmp_table_field_from_field_type(table, 0);
66
bool result_as_int64_t() { return true; }
67
type::Decimal *val_decimal(type::Decimal *decimal_value)
70
return val_decimal_from_date(decimal_value);
72
int save_in_field(Field *field,
75
return save_date_in_field(field);
79
class Item_date_func :public Item_str_func
82
Item_date_func() :Item_str_func() {}
83
Item_date_func(Item *a) :Item_str_func(a) {}
84
Item_date_func(Item *a,Item *b) :Item_str_func(a,b) {}
85
Item_date_func(Item *a,Item *b, Item *c) :Item_str_func(a,b,c) {}
86
enum_field_types field_type() const { return DRIZZLE_TYPE_DATETIME; }
88
using Item_func::tmp_table_field;
89
Field *tmp_table_field(Table *table)
91
return tmp_table_field_from_field_type(table, 0);
93
bool result_as_int64_t() { return true; }
94
double val_real() { return (double) val_int(); }
95
type::Decimal *val_decimal(type::Decimal *decimal_value)
98
return val_decimal_from_date(decimal_value);
100
int save_in_field(Field *field,
103
return save_date_in_field(field);
107
} /* namespace drizzled */
109
#endif /* DRIZZLED_FUNCTION_TIME_DATE_H */