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
|
/* Copyright (c) 2019, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
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, version 2.0, 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 "sql/dd/ndbinfo_schema/init.h"
#include <assert.h>
#include "lex_string.h"
#include "m_ctype.h"
#include "mysql/components/services/log_builtins.h" // LogErr
#include "mysql/thread_type.h"
#include "mysql_version.h"
#include "sql/bootstrap.h" // bootstrap::run_bootstrap_thread
#include "sql/dd/cache/dictionary_client.h" // dd::cache::Dictionary_client
#include "sql/dd/dd_schema.h" // dd::schema_exists
#include "sql/dd/dd_utility.h" // check_if_server_ddse_readonly
#include "sql/dd/impl/dictionary_impl.h" // dd::Dictionary_impl
#include "sql/dd/impl/utils.h" // execute_query
#include "sql/dd/properties.h" // dd::Properties
#include "sql/dd/string_type.h" // dd::String_type
#include "sql/dd/upgrade/server.h" // UPGRADE_FORCE
#include "sql/handler.h" // handlerton
#include "sql/opt_costconstantcache.h" // init_optimizer_cost_model()
#include "sql/plugin_table.h" // Plugin_table
#include "sql/sql_class.h" // THD
#include "sql/sql_list.h" // List<T>
#include "sql/thd_raii.h" // Disable_autocommit_guard
static bool forced_upgrade{false};
static bool create_schema(THD *thd, const char *schema_name) {
bool exists = false;
if (dd::schema_exists(thd, schema_name, &exists)) return true;
if (exists) return false;
dd::String_type query("CREATE SCHEMA ");
query.append(schema_name);
return dd::execute_query(thd, query);
}
/* WL#11563
Starting from MySQL 8.0.20, the installed version of the ndbinfo schema
is stored in dd_properties.
If the property does not exist, or the stored schema version does not match
the current version number, this indicates that the server has been upgraded
(or downgraded), and all existing ndbinfo tables and views should be dropped
and re-created using the current definitions.
*/
static bool check_ndbinfo_schema_has_correct_version(THD *thd) {
uint version;
dd::Dictionary_impl *d = dd::Dictionary_impl::instance();
bool tag_exists = d->get_actual_ndbinfo_schema_version(thd, &version);
return tag_exists ? (version == MYSQL_VERSION_ID) : false;
}
static bool drop_object(THD *thd, const Plugin_table &table) {
dd::String_type drop_sql("DROP ");
drop_sql.append(table.get_object_type()); // TABLE or VIEW
drop_sql.append(" IF EXISTS ").append(table.get_qualified_name());
return dd::execute_query(thd, drop_sql);
}
static bool create_object(THD *thd, const Plugin_table &table) {
if (table.get_table_definition()) {
if (dd::execute_query(thd, table.get_ddl())) return true;
}
return false; // success
}
static bool initialize_ndbinfo(THD *thd) {
dd::cache::Dictionary_client::Auto_releaser releaser(thd->dd_client());
Disable_autocommit_guard autocommit_guard(thd);
// Fetch the ndbinfo handler.
plugin_ref plugin = ha_resolve_by_name_raw(thd, LEX_CSTRING{"ndbinfo", 7});
// If the plugin was not found, the server is running without ndbinfo
if (plugin == nullptr) {
return false;
}
// If ndbinfo is present, it should have been initialized
handlerton *hton = plugin_data<handlerton *>(plugin);
if (!(hton && hton->dict_init)) {
assert(false);
return true;
}
// Also check that ndbcluster itself is enabled
if (!ha_storage_engine_is_enabled(
ha_resolve_by_legacy_type(thd, DB_TYPE_NDBCLUSTER))) {
return false;
}
// If no upgrade is needed, just write the "not upgrading" log message
if (!forced_upgrade) {
if (check_ndbinfo_schema_has_correct_version(thd)) {
LogErr(INFORMATION_LEVEL, ER_NDBINFO_NOT_UPGRADING_SCHEMA);
return false;
}
}
// Abort if the data dictionary is in read-only mode
if (dd::check_if_server_ddse_readonly(thd, "ndbinfo")) return true;
// Upgrade of ndbinfo schema begins here. Write the "upgrading" log message.
LogErr(INFORMATION_LEVEL, ER_NDBINFO_UPGRADING_SCHEMA, MYSQL_SERVER_VERSION);
// Call into hton->dict_init() to fetch all ndbinfo tables and views
List<const Plugin_table> ndbinfo_tables;
if (hton->dict_init(DICT_INIT_CREATE_FILES,
dd::Dictionary_impl::instance()->get_target_dd_version(),
&ndbinfo_tables, nullptr))
return true;
// Create the ndbinfo schema
if (create_schema(thd, "ndbinfo")) return true;
// Drop all known tables & views (current version and previous versions)
bool failed = false;
for (const Plugin_table &table : ndbinfo_tables) {
if (!failed) {
failed = drop_object(thd, table);
}
}
// Create the current set of tables and views
for (const Plugin_table &table : ndbinfo_tables) {
if (!failed) {
failed = create_object(thd, table);
}
}
// Update the stored version number
if (!failed) {
dd::Dictionary_impl *d = dd::Dictionary_impl::instance();
failed = d->set_ndbinfo_schema_version(thd, MYSQL_VERSION_ID);
}
ndbinfo_tables.delete_elements();
// Commit the DD transaction
return dd::end_transaction(thd, failed);
}
/* Public interface */
namespace dd {
namespace ndbinfo {
bool init_schema_and_tables(long upgrade_mode) {
forced_upgrade = (upgrade_mode == UPGRADE_FORCE);
// Creating views will require the cost module to be initialized
init_optimizer_cost_module(false);
bool r = ::bootstrap::run_bootstrap_thread(
nullptr, nullptr, &initialize_ndbinfo, SYSTEM_THREAD_DD_RESTART);
// Shut down the temporary cost module
delete_optimizer_cost_module();
return r;
}
} // namespace ndbinfo
} // namespace dd
|
