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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/* -*- 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 <boost/lexical_cast.hpp>
#include <boost/exception/get_error_info.hpp>
#include <string>
#include "drizzled/session.h"
#include "drizzled/item/string.h"
#include "drizzled/sql_list.h"
using namespace std;
namespace drizzled
{
/**
Execute update of all variables.
First run a check of all variables that all updates will go ok.
If yes, then execute all updates, returning an error if any one failed.
This should ensure that in all normal cases none all or variables are
updated.
@param Session Thread id
@param var_list List of variables to update
@retval
0 ok
@retval
1 ERROR, message sent (normally no variables was updated)
@retval
-1 ERROR, message not sent
*/
int sql_set_variables(Session *session, const SetVarVector &var_list)
{
int error;
SetVarVector::const_iterator it(var_list.begin());
while (it != var_list.end())
{
if ((error= (*it)->check(session)))
goto err;
++it;
}
if (!(error= test(session->is_error())))
{
it= var_list.begin();
while (it != var_list.end())
{
error|= (*it)->update(session); // Returns 0, -1 or 1
++it;
}
}
err:
free_underlaid_joins(session, &session->lex->select_lex);
return(error);
}
/*****************************************************************************
Functions to handle SET mysql_internal_variable=const_expr
*****************************************************************************/
set_var::set_var(sql_var_t type_arg, sys_var *var_arg,
const LEX_STRING *base_name_arg, Item *value_arg) :
var(var_arg), type(type_arg), base(*base_name_arg)
{
/*
If the set value is a field, change it to a string to allow things like
SET table_type=MYISAM;
*/
if (value_arg && value_arg->type() == Item::FIELD_ITEM)
{
Item_field *item= (Item_field*) value_arg;
if (!(value=new Item_string(item->field_name,
(uint32_t) strlen(item->field_name),
item->collation.collation)))
value=value_arg; /* Give error message later */
}
else
value=value_arg;
}
int set_var::check(Session *session)
{
if (var->is_readonly())
{
my_error(ER_INCORRECT_GLOBAL_LOCAL_VAR, MYF(0), var->getName().c_str(), "read only");
return -1;
}
if (var->check_type(type))
{
int err= type == OPT_GLOBAL ? ER_LOCAL_VARIABLE : ER_GLOBAL_VARIABLE;
my_error(static_cast<drizzled::error_t>(err), MYF(0), var->getName().c_str());
return -1;
}
/* value is a NULL pointer if we are using SET ... = DEFAULT */
if (!value)
{
if (var->check_default(type))
{
my_error(ER_NO_DEFAULT, MYF(0), var->getName().c_str());
return -1;
}
return 0;
}
if ((!value->fixed &&
value->fix_fields(session, &value)) || value->check_cols(1))
return -1;
if (var->check_update_type(value->result_type()))
{
my_error(ER_WRONG_TYPE_FOR_VAR, MYF(0), var->getName().c_str());
return -1;
}
return var->check(session, this) ? -1 : 0;
}
/**
Update variable
@param session thread handler
@returns 0|1 ok or ERROR
@note ERROR can be only due to abnormal operations involving
the server's execution evironment such as
out of memory, hard disk failure or the computer blows up.
Consider set_var::check() method if there is a need to return
an error due to logics.
*/
int set_var::update(Session *session)
{
try
{
if (! value)
var->set_default(session, type);
else if (var->update(session, this))
return -1; // should never happen
if (var->getAfterUpdateTrigger())
(*var->getAfterUpdateTrigger())(session, type);
}
catch (invalid_option_value &ex)
{
/* TODO: Fix this to be typesafe once we have properly typed set_var */
string new_val= boost::lexical_cast<string>(save_result.uint32_t_value);
if (boost::get_error_info<invalid_max_info>(ex) != NULL)
{
const uint64_t max_val= *(boost::get_error_info<invalid_max_info>(ex));
string explanation("(> ");
explanation.append(boost::lexical_cast<std::string>(max_val));
explanation.push_back(')');
push_warning_printf(session, DRIZZLE_ERROR::WARN_LEVEL_ERROR,
ER_INVALID_OPTION_VALUE,
ER(ER_INVALID_OPTION_VALUE),
var->getName().c_str(),
new_val.c_str(),
explanation.c_str());
}
else if (boost::get_error_info<invalid_min_info>(ex) != NULL)
{
const int64_t min_val= *(boost::get_error_info<invalid_min_info>(ex));
string explanation("(< ");
explanation.append(boost::lexical_cast<std::string>(min_val));
explanation.push_back(')');
push_warning_printf(session, DRIZZLE_ERROR::WARN_LEVEL_ERROR,
ER_INVALID_OPTION_VALUE,
ER(ER_INVALID_OPTION_VALUE),
var->getName().c_str(),
new_val.c_str(),
explanation.c_str());
}
else
{
push_warning_printf(session, DRIZZLE_ERROR::WARN_LEVEL_ERROR,
ER_INVALID_OPTION_VALUE,
ER(ER_INVALID_OPTION_VALUE),
var->getName().c_str(),
new_val.c_str(),
"");
}
}
return 0;
}
/*****************************************************************************
Functions to handle SET @user_variable=const_expr
*****************************************************************************/
int set_var_user::check(Session *session)
{
/*
Item_func_set_user_var can't substitute something else on its place =>
0 can be passed as last argument (reference on item)
*/
return (user_var_item->fix_fields(session, (Item**) 0) ||
user_var_item->check(0)) ? -1 : 0;
}
int set_var_user::update(Session *)
{
if (user_var_item->update())
{
/* Give an error if it's not given already */
my_message(ER_SET_CONSTANTS_ONLY, ER(ER_SET_CONSTANTS_ONLY), MYF(0));
return -1;
}
return 0;
}
} /* namespace drizzled */
|