1
/* Copyright (C) 2000-2006 MySQL AB
3
This program is free software; you can redistribute it and/or modify
4
it under the terms of the GNU General Public License as published by
5
the Free Software Foundation; version 2 of the License.
7
This program is distributed in the hope that it will be useful,
8
but WITHOUT ANY WARRANTY; without even the implied warranty of
9
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10
GNU General Public License for more details.
12
You should have received a copy of the GNU General Public License
13
along with this program; if not, write to the Free Software
14
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
21
This file defines all string functions
24
Some string functions don't always put and end-null on a String.
25
(This shouldn't be needed)
30
#include <drizzled/query_id.h>
31
#include <drizzled/error.h>
32
#include <drizzled/function/str/strfunc.h>
35
#include <drizzled/internal/my_static.h>
42
Item_str_func::~Item_str_func() {}
44
bool Item_str_func::fix_fields(Session *session, Item **ref)
46
bool res= Item_func::fix_fields(session, ref);
48
In Item_str_func::check_well_formed_result() we may set null_value
49
flag on the same condition as in test() below.
51
maybe_null= (maybe_null || true);
56
type::Decimal *Item_str_func::val_decimal(type::Decimal *decimal_value)
60
String *res, tmp(buff,sizeof(buff), &my_charset_bin);
65
(void)decimal_value->store(E_DEC_FATAL_ERROR, (char*) res->ptr(), res->length(), res->charset());
71
double Item_str_func::val_real()
75
char *end_not_used, buff[64];
76
String *res, tmp(buff,sizeof(buff), &my_charset_bin);
78
return res ? my_strntod(res->charset(), (char*) res->ptr(), res->length(),
79
&end_not_used, &err_not_used) : 0.0;
83
int64_t Item_str_func::val_int()
87
char buff[DECIMAL_LONGLONG_DIGITS];
88
String *res, tmp(buff,sizeof(buff), &my_charset_bin);
91
my_strntoll(res->charset(), res->ptr(), res->length(), 10, NULL,
96
void Item_str_func::left_right_max_length()
98
max_length=args[0]->max_length;
99
if (args[1]->const_item())
101
int length=(int) args[1]->val_int()*collation.collation->mbmaxlen;
105
set_if_smaller(max_length,(uint) length);
109
DRIZZLED_API String my_empty_string("",default_charset_info);
111
} /* namespace drizzled */