1 /* Copyright (c) 2014, 2020, Oracle and/or its affiliates. All rights reserved. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License, version 2.0, 5 as published by the Free Software Foundation. 6 7 This program is also distributed with certain software (including 8 but not limited to OpenSSL) that is licensed under separate terms, 9 as designated in a particular file or component or in included license 10 documentation. The authors of MySQL hereby grant you an additional 11 permission to link the program and your derivative works with the 12 separately licensed software that they have included with MySQL. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License, version 2.0, for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ 22 23 #ifndef DD__TRANSACTION_IMPL_INCLUDED 24 #define DD__TRANSACTION_IMPL_INCLUDED 25 26 #include <sys/types.h> 27 #include <map> 28 29 #include "my_inttypes.h" 30 #include "mysql/udf_registration_types.h" 31 #include "sql/dd/dd_kill_immunizer.h" // dd::DD_kill_immunizer 32 #include "sql/dd/impl/types/abstract_table_impl.h" 33 #include "sql/dd/impl/types/charset_impl.h" 34 #include "sql/dd/impl/types/check_constraint_impl.h" 35 #include "sql/dd/impl/types/collation_impl.h" 36 #include "sql/dd/impl/types/column_impl.h" 37 #include "sql/dd/impl/types/column_statistics_impl.h" 38 #include "sql/dd/impl/types/event_impl.h" 39 #include "sql/dd/impl/types/foreign_key_impl.h" 40 #include "sql/dd/impl/types/function_impl.h" 41 #include "sql/dd/impl/types/index_stat_impl.h" 42 #include "sql/dd/impl/types/parameter_impl.h" 43 #include "sql/dd/impl/types/partition_impl.h" 44 #include "sql/dd/impl/types/procedure_impl.h" 45 #include "sql/dd/impl/types/resource_group_impl.h" 46 #include "sql/dd/impl/types/routine_impl.h" 47 #include "sql/dd/impl/types/schema_impl.h" 48 #include "sql/dd/impl/types/spatial_reference_system_impl.h" 49 #include "sql/dd/impl/types/table_impl.h" 50 #include "sql/dd/impl/types/table_stat_impl.h" 51 #include "sql/dd/impl/types/tablespace_impl.h" 52 #include "sql/dd/impl/types/trigger_impl.h" 53 #include "sql/dd/impl/types/view_impl.h" 54 #include "sql/dd/impl/types/view_routine_impl.h" 55 #include "sql/dd/impl/types/view_table_impl.h" 56 #include "sql/dd/string_type.h" // dd::String_type 57 #include "sql/discrete_interval.h" 58 #include "sql/field.h" 59 #include "sql/handler.h" 60 #include "sql/set_var.h" 61 #include "sql/sql_class.h" // THD::killed_state 62 #include "thr_lock.h" 63 64 struct LEX; 65 66 namespace dd { 67 68 class Raw_table; 69 70 /////////////////////////////////////////////////////////////////////////// 71 72 /** 73 Auxiliary class for opening dictionary tables. 74 */ 75 class Open_dictionary_tables_ctx { 76 public: Open_dictionary_tables_ctx(THD * thd,thr_lock_type lock_type)77 Open_dictionary_tables_ctx(THD *thd, thr_lock_type lock_type) 78 : m_thd(thd), m_lock_type(lock_type), m_ignore_global_read_lock(false) {} 79 80 ~Open_dictionary_tables_ctx(); 81 82 Raw_table *get_table(const String_type &name) const; 83 84 template <typename T> get_table()85 Raw_table *get_table() const { 86 return get_table(T::DD_table::instance().name()); 87 } 88 89 template <typename X> register_tables()90 void register_tables() { 91 X::Impl::register_tables(this); 92 } 93 94 template <typename X> add_table()95 void add_table() { 96 this->add_table(X::instance().name()); 97 } 98 99 /** 100 Open all the DD tables in list Open_dictionary_tables_ctx::m_tables. 101 102 @return true - On failure and error is reported. 103 @return false - On success. 104 */ 105 bool open_tables(); 106 107 void add_table(const String_type &name); 108 get_thd()109 THD *get_thd() const { return m_thd; } 110 111 /** 112 Ignore global read lock when opening the tables. 113 */ mark_ignore_global_read_lock()114 void mark_ignore_global_read_lock() { 115 if (m_lock_type == TL_WRITE) m_ignore_global_read_lock = true; 116 } 117 118 private: 119 THD *m_thd; 120 thr_lock_type m_lock_type; 121 bool m_ignore_global_read_lock; 122 typedef std::map<String_type, Raw_table *> Object_table_map; 123 Object_table_map m_tables; 124 }; 125 126 /** 127 Implementation of read-only data-dictionary transaction. 128 Relies on attachable transactions infrastructure. 129 */ 130 class Transaction_ro { 131 public: Transaction_ro(THD * thd,enum_tx_isolation isolation)132 Transaction_ro(THD *thd, enum_tx_isolation isolation) 133 : otx(thd, TL_READ), m_thd(thd), m_kill_immunizer(thd) { 134 thd->begin_attachable_ro_transaction(); 135 thd->tx_isolation = isolation; 136 } 137 ~Transaction_ro()138 ~Transaction_ro() { m_thd->end_attachable_transaction(); } 139 140 Open_dictionary_tables_ctx otx; 141 142 private: 143 THD *m_thd; 144 145 DD_kill_immunizer m_kill_immunizer; 146 }; 147 148 /////////////////////////////////////////////////////////////////////////// 149 150 /** 151 Class for storing/restoring state during dictionary update operations. 152 */ 153 class Update_dictionary_tables_ctx { 154 public: 155 Update_dictionary_tables_ctx(THD *thd); 156 157 ~Update_dictionary_tables_ctx(); 158 159 Open_dictionary_tables_ctx otx; 160 161 private: 162 THD *m_thd; 163 164 DD_kill_immunizer m_kill_immunizer; 165 166 LEX *m_lex_saved; 167 168 // Stores state before DD operations 169 Open_tables_backup m_open_tables_state_backup; 170 bool m_saved_binlog_row_based; 171 ulonglong m_saved_options; 172 sql_mode_t m_saved_mode; 173 long long m_latest_auto_incr_id; 174 enum_check_fields m_saved_check_for_truncated_fields; 175 uint m_saved_in_sub_stmt; 176 bool m_saved_time_zone_used; 177 178 /* 179 Save auto_increment_increment state. 180 181 Value of the auto_increment_increment is set to 1 in the constructor. 182 auto_increment_offset is used only when auto_increment_increment is greater 183 than 1. So saving only auto_increment_increment value. 184 */ 185 ulong m_saved_auto_increment_increment; 186 187 // Save auto_inc_intervals_in_cur_stmt_for_binlog 188 Discrete_intervals_list m_auto_inc_intervals_in_cur_stmt_for_binlog_saved; 189 190 Discrete_intervals_list m_auto_inc_intervals_forced_saved; 191 }; 192 193 /////////////////////////////////////////////////////////////////////////// 194 195 } // namespace dd 196 197 #endif // DD__TRANSACTION_IMPL_INCLUDED 198