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
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
#include <drizzled/server_includes.h>
22
#include <drizzled/function/math/divide.h>
23
#include <drizzled/session.h>
25
double Item_func_div::real_op()
28
double value= args[0]->val_real();
29
double val2= args[1]->val_real();
30
if ((null_value= args[0]->null_value || args[1]->null_value))
34
signal_divide_by_null();
37
return fix_result(value/val2);
41
my_decimal *Item_func_div::decimal_op(my_decimal *decimal_value)
43
my_decimal value1, *val1;
44
my_decimal value2, *val2;
47
val1= args[0]->val_decimal(&value1);
48
if ((null_value= args[0]->null_value))
50
val2= args[1]->val_decimal(&value2);
51
if ((null_value= args[1]->null_value))
53
if ((err= my_decimal_div(E_DEC_FATAL_ERROR & ~E_DEC_DIV_ZERO, decimal_value,
54
val1, val2, prec_increment)) > 3)
56
if (err == E_DEC_DIV_ZERO)
57
signal_divide_by_null();
65
void Item_func_div::result_precision()
67
uint32_t precision=cmin(args[0]->decimal_precision() + prec_increment,
68
(unsigned int)DECIMAL_MAX_PRECISION);
69
/* Integer operations keep unsigned_flag if one of arguments is unsigned */
70
if (result_type() == INT_RESULT)
71
unsigned_flag= args[0]->unsigned_flag | args[1]->unsigned_flag;
73
unsigned_flag= args[0]->unsigned_flag & args[1]->unsigned_flag;
74
decimals= cmin(args[0]->decimals + prec_increment, (unsigned int)DECIMAL_MAX_SCALE);
75
max_length= my_decimal_precision_to_length(precision, decimals,
80
void Item_func_div::fix_length_and_dec()
82
prec_increment= current_session->variables.div_precincrement;
83
Item_num_op::fix_length_and_dec();
87
decimals=cmax(args[0]->decimals,args[1]->decimals)+prec_increment;
88
set_if_smaller(decimals, NOT_FIXED_DEC);
89
max_length=args[0]->max_length - args[0]->decimals + decimals;
90
uint32_t tmp=float_length(decimals);
91
set_if_smaller(max_length,tmp);
95
hybrid_type= DECIMAL_RESULT;
104
maybe_null= 1; // devision by zero