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
|
/* -*- 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
*/
#include <config.h>
#include <drizzled/function/str/make_set.h>
#include <drizzled/session.h>
namespace drizzled {
void Item_func_make_set::update_used_tables()
{
Item_func::update_used_tables();
item->update_used_tables();
used_tables_cache|=item->used_tables();
const_item_cache&=item->const_item();
}
void Item_func_make_set::split_sum_func(Session *session_arg, Item **ref_pointer_array,
List<Item> &fields)
{
item->split_sum_func(session_arg, ref_pointer_array, fields, &item, true);
Item_str_func::split_sum_func(session_arg, ref_pointer_array, fields);
}
void Item_func_make_set::fix_length_and_dec()
{
max_length=arg_count-1;
if (agg_arg_charsets(collation, args, arg_count, MY_COLL_ALLOW_CONV, 1))
return;
for (uint32_t i=0 ; i < arg_count ; i++)
max_length+=args[i]->max_length;
used_tables_cache|= item->used_tables();
not_null_tables_cache&= item->not_null_tables();
const_item_cache&= item->const_item();
with_sum_func= with_sum_func || item->with_sum_func;
}
String *Item_func_make_set::val_str(String *str)
{
assert(fixed == 1);
uint64_t bits;
bool first_found=0;
Item **ptr=args;
String *result=&my_empty_string;
bits=item->val_int();
if ((null_value=item->null_value))
return NULL;
if (arg_count < 64)
bits &= ((uint64_t) 1 << arg_count)-1;
for (; bits; bits >>= 1, ptr++)
{
if (bits & 1)
{
String *res= (*ptr)->val_str(str);
if (res) // Skip nulls
{
if (!first_found)
{ // First argument
first_found=1;
if (res != str)
result=res; // Use original string
else
{
tmp_str.copy(*res);
result= &tmp_str;
}
}
else
{
if (result != &tmp_str)
{ // Copy data to tmp_str
tmp_str.alloc(result->length()+res->length()+1);
tmp_str.copy(*result);
result= &tmp_str;
}
tmp_str.append(STRING_WITH_LEN(","));
tmp_str.append(*res);
}
}
}
}
return result;
}
Item *Item_func_make_set::transform(Item_transformer transformer, unsigned char *arg)
{
Item *new_item= item->transform(transformer, arg);
if (!new_item)
return 0;
item= new_item;
return Item_str_func::transform(transformer, arg);
}
void Item_func_make_set::print(String *str)
{
str->append(STRING_WITH_LEN("make_set("));
item->print(str);
if (arg_count)
{
str->append(',');
print_args(str, 0);
}
str->append(')');
}
} /* namespace drizzled */
|