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rpl_handler.cc
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/* Copyright (c) 2008, 2024, 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/rpl_handler.h"
#include <string.h>
#include <memory>
#include <new>
#include <unordered_map>
#include <utility>
#include <vector>
#include "lex_string.h"
#include "map_helpers.h"
#include "my_compiler.h"
#include "my_dbug.h"
#include "my_io.h"
#include "mysql/components/services/bits/psi_bits.h"
#include "mysql/components/services/log_builtins.h"
#include "mysql/components/services/log_shared.h"
#include "mysql/my_loglevel.h"
#include "mysql/plugin.h"
#include "mysql/psi/mysql_mutex.h"
#include "mysql/service_mysql_alloc.h"
#include "mysql/strings/m_ctype.h"
#include "mysqld_error.h"
#include "prealloced_array.h"
#include "sql/current_thd.h"
#include "sql/debug_sync.h" // DEBUG_SYNC
#include "sql/handler.h"
#include "sql/item_func.h" // user_var_entry
#include "sql/key.h"
#include "sql/log.h"
#include "sql/mysqld.h" // server_uuid
#include "sql/psi_memory_key.h"
#include "sql/raii/sentry.h" // raii::Sentry<T>
#include "sql/replication.h" // Trans_param
#include "sql/rpl_gtid.h"
#include "sql/rpl_mi.h" // Master_info
#include "sql/set_var.h" // OPT_PERSIST
#include "sql/sql_class.h" // THD
#include "sql/sql_const.h"
#include "sql/sql_lex.h"
#include "sql/sql_parse.h" // sql_command_flags
#include "sql/sql_plugin.h" // plugin_int_to_ref
#include "sql/system_variables.h"
#include "sql/table.h"
#include "sql/thr_malloc.h"
#include "sql/transaction_info.h"
#include "sql_string.h"
Trans_delegate *transaction_delegate;
Binlog_storage_delegate *binlog_storage_delegate;
Server_state_delegate *server_state_delegate;
Binlog_transmit_delegate *binlog_transmit_delegate;
Binlog_relay_IO_delegate *binlog_relay_io_delegate;
bool opt_replication_optimize_for_static_plugin_config{false};
std::atomic<bool> opt_replication_sender_observe_commit_only{false};
Observer_info::Observer_info(void *ob, st_plugin_int *p)
: observer(ob), plugin_int(p) {
plugin = plugin_int_to_ref(plugin_int);
}
Delegate::Delegate(
#ifdef HAVE_PSI_RWLOCK_INTERFACE
PSI_rwlock_key key
#endif
) {
inited = false;
m_configured_lock_type.store(opt_replication_optimize_for_static_plugin_config
? DELEGATE_SPIN_LOCK
: DELEGATE_OS_LOCK);
m_acquired_locks.store(0);
#ifdef HAVE_PSI_RWLOCK_INTERFACE
if (mysql_rwlock_init(key, &lock)) return;
#else
if (mysql_rwlock_init(0, &lock)) return;
#endif
inited = true;
}
Delegate::~Delegate() {
inited = false;
mysql_rwlock_destroy(&lock);
}
int Delegate::add_observer(void *observer, st_plugin_int *plugin) {
int ret = false;
if (!inited) return true;
write_lock();
Observer_info_iterator iter(observer_info_list);
Observer_info *info = iter++;
while (info && info->observer != observer) info = iter++;
if (!info) {
info = new Observer_info(observer, plugin);
if (!info || observer_info_list.push_back(info, &memroot))
ret = true;
else if (this->use_spin_lock_type())
acquire_plugin_ref_count(info);
} else
ret = true;
unlock();
return ret;
}
int Delegate::remove_observer(void *observer) {
int ret = false;
if (!inited) return true;
write_lock();
Observer_info_iterator iter(observer_info_list);
Observer_info *info = iter++;
while (info && info->observer != observer) info = iter++;
if (info) {
iter.remove();
delete info;
} else
ret = true;
unlock();
return ret;
}
Delegate::Observer_info_iterator Delegate::observer_info_iter() {
return Observer_info_iterator(observer_info_list);
}
bool Delegate::is_empty() {
DBUG_PRINT("debug", ("is_empty: %d", observer_info_list.is_empty()));
return observer_info_list.is_empty();
}
int Delegate::read_lock() {
if (!inited) return true;
this->lock_it(DELEGATE_LOCK_MODE_SHARED);
return 0;
}
int Delegate::write_lock() {
if (!inited) return true;
this->lock_it(DELEGATE_LOCK_MODE_EXCLUSIVE);
return 0;
}
int Delegate::unlock() {
if (!inited) return true;
int result = 0;
if (m_acquired_locks.load() > 0) {
m_acquired_locks -= DELEGATE_SPIN_LOCK;
if (m_spin_lock.is_exclusive_acquisition())
m_spin_lock.release_exclusive();
else {
assert(m_spin_lock.is_shared_acquisition());
m_spin_lock.release_shared();
}
} else {
assert(m_acquired_locks.load() < 0);
m_acquired_locks -= DELEGATE_OS_LOCK;
result = mysql_rwlock_unlock(&lock);
}
return result;
}
bool Delegate::is_inited() { return inited; }
void Delegate::update_lock_type() {
if (!inited) return;
int opt_value = opt_replication_optimize_for_static_plugin_config
? DELEGATE_SPIN_LOCK
: DELEGATE_OS_LOCK;
m_configured_lock_type.store(opt_value);
}
void Delegate::update_plugin_ref_count() {
if (!inited) return;
int opt_value = opt_replication_optimize_for_static_plugin_config
? DELEGATE_SPIN_LOCK
: DELEGATE_OS_LOCK;
int intern_value = m_configured_lock_type.load();
if (intern_value == DELEGATE_SPIN_LOCK && opt_value == DELEGATE_OS_LOCK) {
for (auto ref : m_acquired_references) {
for (size_t count = ref.second; count != 0; --count)
plugin_unlock(nullptr, ref.first);
}
m_acquired_references.clear();
} else if (intern_value == DELEGATE_OS_LOCK &&
opt_value == DELEGATE_SPIN_LOCK) {
Observer_info_iterator iter = observer_info_iter();
for (Observer_info *info = iter++; info; info = iter++) {
acquire_plugin_ref_count(info);
}
}
}
bool Delegate::use_rw_lock_type() {
return m_acquired_locks.load() < 0 || // If there are acquisitions using
// the read-write lock
(m_configured_lock_type.load() ==
DELEGATE_OS_LOCK && // or the lock type has been set to use the
// read-write lock
m_acquired_locks.load() == 0); // and there are no outstanding
// acquisitions using shared
// spin-lock, use the read-write
// lock
}
bool Delegate::use_spin_lock_type() {
return m_acquired_locks.load() > 0 || // If there are acquisitions using
// the shared spin-lock
(m_configured_lock_type.load() ==
DELEGATE_SPIN_LOCK && // or the lock type has been set to use the
// shared spin-lock
m_acquired_locks.load() == 0); // and there are no outstanding
// acquisitions using read-write
// lock, use the shared
// sping-lock
}
void Delegate::acquire_plugin_ref_count(Observer_info *info) {
plugin_ref internal_ref = plugin_lock(nullptr, &info->plugin);
++(m_acquired_references[internal_ref]);
}
void Delegate::lock_it(enum_delegate_lock_mode mode) {
do {
if (this->use_spin_lock_type()) {
if (mode == DELEGATE_LOCK_MODE_SHARED)
m_spin_lock.acquire_shared();
else
m_spin_lock.acquire_exclusive();
if (m_configured_lock_type.load() !=
DELEGATE_SPIN_LOCK) { // Lock type changed in the meanwhile, lets
// revert the acquisition and try again
if (mode == DELEGATE_LOCK_MODE_SHARED)
m_spin_lock.release_shared();
else
m_spin_lock.release_exclusive();
} else {
m_acquired_locks += DELEGATE_SPIN_LOCK;
break;
}
}
if (this->use_rw_lock_type()) {
if (mode == DELEGATE_LOCK_MODE_SHARED)
mysql_rwlock_rdlock(&lock);
else
mysql_rwlock_wrlock(&lock);
if (m_configured_lock_type.load() !=
DELEGATE_OS_LOCK) // Lock type changed in the meanwhile, lets revert
// the acquisition and try again
mysql_rwlock_unlock(&lock);
else {
m_acquired_locks += DELEGATE_OS_LOCK;
break;
}
}
} while (true);
}
/*
structure to save transaction log filename and position
*/
typedef struct Trans_binlog_info {
my_off_t log_pos;
char log_file[FN_REFLEN];
} Trans_binlog_info;
int get_user_var_int(const char *name, long long int *value, int *null_value) {
bool null_val;
THD *thd = current_thd;
/* Protects thd->user_vars. */
mysql_mutex_lock(&thd->LOCK_thd_data);
const auto it = thd->user_vars.find(name);
if (it == thd->user_vars.end()) {
mysql_mutex_unlock(&thd->LOCK_thd_data);
return 1;
}
*value = it->second->val_int(&null_val);
if (null_value) *null_value = null_val;
mysql_mutex_unlock(&thd->LOCK_thd_data);
return 0;
}
int get_user_var_real(const char *name, double *value, int *null_value) {
bool null_val;
THD *thd = current_thd;
/* Protects thd->user_vars. */
mysql_mutex_lock(&thd->LOCK_thd_data);
const auto it = thd->user_vars.find(name);
if (it == thd->user_vars.end()) {
mysql_mutex_unlock(&thd->LOCK_thd_data);
return 1;
}
*value = it->second->val_real(&null_val);
if (null_value) *null_value = null_val;
mysql_mutex_unlock(&thd->LOCK_thd_data);
return 0;
}
int get_user_var_str(const char *name, char *value, size_t len,
unsigned int precision, int *null_value) {
String str;
bool null_val;
THD *thd = current_thd;
/* Protects thd->user_vars. */
mysql_mutex_lock(&thd->LOCK_thd_data);
const auto it = thd->user_vars.find(name);
if (it == thd->user_vars.end()) {
mysql_mutex_unlock(&thd->LOCK_thd_data);
return 1;
}
it->second->val_str(&null_val, &str, precision);
strncpy(value, str.c_ptr(), len);
if (null_value) *null_value = null_val;
mysql_mutex_unlock(&thd->LOCK_thd_data);
return 0;
}
int delegates_init() {
alignas(Trans_delegate) static char place_trans_mem[sizeof(Trans_delegate)];
alignas(Binlog_storage_delegate) static char
place_storage_mem[sizeof(Binlog_storage_delegate)];
alignas(Server_state_delegate) static char
place_state_mem[sizeof(Server_state_delegate)];
alignas(Binlog_transmit_delegate) static char
place_transmit_mem[sizeof(Binlog_transmit_delegate)];
alignas(Binlog_relay_IO_delegate) static char
place_relay_io_mem[sizeof(Binlog_relay_IO_delegate)];
transaction_delegate = new (place_trans_mem) Trans_delegate;
if (!transaction_delegate->is_inited()) {
LogErr(ERROR_LEVEL, ER_RPL_TRX_DELEGATES_INIT_FAILED);
return 1;
}
binlog_storage_delegate = new (place_storage_mem) Binlog_storage_delegate;
if (!binlog_storage_delegate->is_inited()) {
LogErr(ERROR_LEVEL, ER_RPL_BINLOG_STORAGE_DELEGATES_INIT_FAILED);
return 1;
}
server_state_delegate = new (place_state_mem) Server_state_delegate;
binlog_transmit_delegate = new (place_transmit_mem) Binlog_transmit_delegate;
if (!binlog_transmit_delegate->is_inited()) {
LogErr(ERROR_LEVEL, ER_RPL_BINLOG_TRANSMIT_DELEGATES_INIT_FAILED);
return 1;
}
binlog_relay_io_delegate = new (place_relay_io_mem) Binlog_relay_IO_delegate;
if (!binlog_relay_io_delegate->is_inited()) {
LogErr(ERROR_LEVEL, ER_RPL_BINLOG_RELAY_DELEGATES_INIT_FAILED);
return 1;
}
return 0;
}
void delegates_shutdown() {
if (opt_replication_optimize_for_static_plugin_config) {
opt_replication_optimize_for_static_plugin_config = false;
delegates_acquire_locks();
delegates_update_lock_type();
delegates_release_locks();
}
}
void delegates_destroy() {
if (transaction_delegate) transaction_delegate->~Trans_delegate();
if (binlog_storage_delegate)
binlog_storage_delegate->~Binlog_storage_delegate();
if (server_state_delegate) server_state_delegate->~Server_state_delegate();
if (binlog_transmit_delegate)
binlog_transmit_delegate->~Binlog_transmit_delegate();
if (binlog_relay_io_delegate)
binlog_relay_io_delegate->~Binlog_relay_IO_delegate();
}
static void delegates_update_plugin_ref_count() {
if (transaction_delegate) transaction_delegate->update_plugin_ref_count();
if (binlog_storage_delegate)
binlog_storage_delegate->update_plugin_ref_count();
if (server_state_delegate) server_state_delegate->update_plugin_ref_count();
if (binlog_transmit_delegate)
binlog_transmit_delegate->update_plugin_ref_count();
if (binlog_relay_io_delegate)
binlog_relay_io_delegate->update_plugin_ref_count();
}
void delegates_acquire_locks() {
if (transaction_delegate) transaction_delegate->write_lock();
if (binlog_storage_delegate) binlog_storage_delegate->write_lock();
if (server_state_delegate) server_state_delegate->write_lock();
if (binlog_transmit_delegate) binlog_transmit_delegate->write_lock();
if (binlog_relay_io_delegate) binlog_relay_io_delegate->write_lock();
}
void delegates_release_locks() {
if (transaction_delegate) transaction_delegate->unlock();
if (binlog_storage_delegate) binlog_storage_delegate->unlock();
if (server_state_delegate) server_state_delegate->unlock();
if (binlog_transmit_delegate) binlog_transmit_delegate->unlock();
if (binlog_relay_io_delegate) binlog_relay_io_delegate->unlock();
}
void delegates_update_lock_type() {
delegates_update_plugin_ref_count();
if (transaction_delegate) transaction_delegate->update_lock_type();
if (binlog_storage_delegate) binlog_storage_delegate->update_lock_type();
if (server_state_delegate) server_state_delegate->update_lock_type();
if (binlog_transmit_delegate) binlog_transmit_delegate->update_lock_type();
if (binlog_relay_io_delegate) binlog_relay_io_delegate->update_lock_type();
}
/*
This macro is used by almost all the Delegate methods to iterate
over all the observers running given callback function of the
delegate .
Add observer plugins to the thd->lex list, after each statement, all
plugins add to thd->lex will be automatically unlocked.
*/
#define FOREACH_OBSERVER(r, f, args) \
r = 0; \
Prealloced_array<plugin_ref, 8> plugins(PSI_NOT_INSTRUMENTED); \
read_lock(); \
Observer_info_iterator iter = observer_info_iter(); \
Observer_info *info = iter++; \
bool replication_optimize_for_static_plugin_config = \
this->use_spin_lock_type(); \
for (; info; info = iter++) { \
plugin_ref plugin = (replication_optimize_for_static_plugin_config \
? info->plugin \
: my_plugin_lock(nullptr, &info->plugin)); \
if (!plugin) { \
/* plugin is not initialized or deleted, this is not an error */ \
continue; \
} \
if (!replication_optimize_for_static_plugin_config) \
plugins.push_back(plugin); \
if (((Observer *)info->observer)->f && \
((Observer *)info->observer)->f args) { \
r = 1; \
LogEvent() \
.prio(ERROR_LEVEL) \
.errcode(ER_RPL_PLUGIN_FUNCTION_FAILED) \
.subsys(LOG_SUBSYSTEM_TAG) \
.function(#f) \
.message("Run function '" #f "' in plugin '%s' failed", \
info->plugin_int->name.str); \
break; \
} \
} \
unlock(); \
/* \
Unlock plugins should be done after we released the Delegate lock \
to avoid possible deadlock when this is the last user of the \
plugin, and when we unlock the plugin, it will try to \
deinitialize the plugin, which will try to lock the Delegate in \
order to remove the observers. \
*/ \
if (!plugins.empty()) \
plugin_unlock_list(nullptr, &plugins[0], plugins.size());
#define FOREACH_OBSERVER_ERROR_OUT(r, f, args, out) \
r = 0; \
Prealloced_array<plugin_ref, 8> plugins(PSI_NOT_INSTRUMENTED); \
read_lock(); \
Observer_info_iterator iter = observer_info_iter(); \
Observer_info *info = iter++; \
\
bool replication_optimize_for_static_plugin_config = \
this->use_spin_lock_type(); \
int error_out = 0; \
for (; info; info = iter++) { \
plugin_ref plugin = (replication_optimize_for_static_plugin_config \
? info->plugin \
: my_plugin_lock(nullptr, &info->plugin)); \
if (!plugin) { \
/* plugin is not initialized or deleted, this is not an error */ \
continue; \
} \
if (!replication_optimize_for_static_plugin_config) \
plugins.push_back(plugin); \
\
if (nullptr == ((Observer *)info->observer)->f) { \
continue; \
} \
bool hook_error = false; \
hook_error = ((Observer *)info->observer)->f(args, error_out); \
\
out += error_out; \
if (hook_error) { \
r = 1; \
LogEvent() \
.prio(ERROR_LEVEL) \
.errcode(ER_RPL_PLUGIN_FUNCTION_FAILED) \
.subsys(LOG_SUBSYSTEM_TAG) \
.function(#f) \
.message("Run function '" #f "' in plugin '%s' failed", \
info->plugin_int->name.str); \
break; \
} \
} \
unlock(); \
/* \
Unlock plugins should be done after we released the Delegate lock \
to avoid possible deadlock when this is the last user of the \
plugin, and when we unlock the plugin, it will try to \
deinitialize the plugin, which will try to lock the Delegate in \
order to remove the observers. \
*/ \
if (!plugins.empty()) \
plugin_unlock_list(nullptr, &plugins[0], plugins.size());
static bool se_before_commit(THD *, plugin_ref plugin, void *arg) {
handlerton *hton = plugin_data<handlerton *>(plugin);
if (hton->se_before_commit) hton->se_before_commit(arg);
return false;
}
int Trans_delegate::before_commit(THD *thd, bool all,
Binlog_cache_storage *trx_cache_log,
Binlog_cache_storage *stmt_cache_log,
ulonglong cache_log_max_size,
bool is_atomic_ddl_arg) {
DBUG_TRACE;
Trans_param param;
TRANS_PARAM_ZERO(param);
param.server_id = thd->server_id;
param.server_uuid = server_uuid;
param.thread_id = thd->thread_id();
param.gtid_info.type = thd->variables.gtid_next.type;
param.gtid_info.sidno = thd->variables.gtid_next.gtid.sidno;
param.gtid_info.automatic_tag = thd->variables.gtid_next.automatic_tag;
param.gtid_info.gno = thd->variables.gtid_next.gtid.gno;
param.trx_cache_log = trx_cache_log;
param.stmt_cache_log = stmt_cache_log;
param.cache_log_max_size = cache_log_max_size;
param.original_commit_timestamp = &thd->variables.original_commit_timestamp;
param.is_atomic_ddl = is_atomic_ddl_arg;
param.rpl_channel_type = thd->rpl_thd_ctx.get_rpl_channel_type();
param.group_replication_consistency =
thd->variables.group_replication_consistency;
param.original_server_version = &(thd->variables.original_server_version);
param.immediate_server_version = &(thd->variables.immediate_server_version);
param.is_create_table_as_query_block =
((thd->lex->sql_command == SQLCOM_CREATE_TABLE &&
!thd->lex->query_block->field_list_is_empty()) ||
thd->m_transactional_ddl.inited());
param.thd = thd;
bool is_real_trans =
(all || !thd->get_transaction()->is_active(Transaction_ctx::SESSION));
if (is_real_trans) param.flags |= TRANS_IS_REAL_TRANS;
int ret = 0;
/* After this debug point we mark the transaction as committing in THD. */
DBUG_EXECUTE_IF("trans_delegate_before_commit_before_before_call_observers", {
const char act[] =
"now signal "
"signal.trans_delegate_before_commit_before_before_call_observers_"
"reached "
"wait_for "
"signal.trans_delegate_before_commit_before_before_call_observers_"
"waiting";
assert(!debug_sync_set_action(thd, STRING_WITH_LEN(act)));
});
thd->rpl_thd_ctx.set_tx_rpl_delegate_stage_status(
Rpl_thd_context::TX_RPL_STAGE_BEFORE_COMMIT);
/**
If thread is killed or commits are blocked do not commit the transaction.
Post this thread cannot be killed.
*/
if (thd->is_killed() || m_rollback_transaction_not_reached_before_commit) {
/**
Disconnect the client connection if not already done.
Do not KILL connection if the transaction is going to be rolledback.
*/
if (!thd->is_killed()) {
mysql_mutex_lock(&thd->LOCK_thd_data);
thd->awake(THD::KILL_CONNECTION);
mysql_mutex_unlock(&thd->LOCK_thd_data);
}
return 1;
}
FOREACH_OBSERVER(ret, before_commit, (¶m));
plugin_foreach(thd, se_before_commit, MYSQL_STORAGE_ENGINE_PLUGIN, ¶m);
return ret;
}
/**
Helper method to check if the given table has 'CASCADE' foreign key or not.
@param[in] table Table object that needs to be verified.
@return bool true If the table has 'CASCADE' foreign key.
false If the table does not have 'CASCADE' foreign key.
*/
bool has_cascade_foreign_key(TABLE *table) {
DBUG_TRACE;
TABLE_SHARE_FOREIGN_KEY_INFO *fk = table->s->foreign_key;
for (uint i = 0; i < table->s->foreign_keys; i++) {
/*
The supported values of update/delete_rule are: CASCADE, SET NULL,
NO ACTION, RESTRICT and SET DEFAULT.
*/
if (dd::Foreign_key::RULE_CASCADE == fk[i].update_rule ||
dd::Foreign_key::RULE_CASCADE == fk[i].delete_rule ||
dd::Foreign_key::RULE_SET_NULL == fk[i].update_rule ||
dd::Foreign_key::RULE_SET_NULL == fk[i].delete_rule ||
dd::Foreign_key::RULE_SET_DEFAULT == fk[i].update_rule ||
dd::Foreign_key::RULE_SET_DEFAULT == fk[i].delete_rule) {
return true;
}
}
return false;
}
/**
Helper method to create table information for the hook call
*/
void prepare_table_info(THD *thd, Trans_table_info *&table_info_list,
uint &number_of_tables) {
DBUG_TRACE;
TABLE *open_tables = thd->open_tables;
// Fail if tables are not open
if (open_tables == nullptr) {
return;
}
// Gather table information
std::vector<Trans_table_info> table_info_holder;
for (; open_tables != nullptr; open_tables = open_tables->next) {
Trans_table_info table_info = {nullptr, 0, 0, false};
if (open_tables->no_replicate) {
continue;
}
table_info.table_name = open_tables->s->table_name.str;
uint primary_keys = 0;
if (open_tables->key_info != nullptr &&
(open_tables->s->primary_key < MAX_KEY)) {
primary_keys = open_tables->s->primary_key;
// if primary keys is still 0, lets double check on another var
if (primary_keys == 0) {
primary_keys = open_tables->key_info->user_defined_key_parts;
}
}
table_info.number_of_primary_keys = primary_keys;
table_info.db_type = open_tables->s->db_type()->db_type;
/*
Find out if the table has foreign key with ON UPDATE/DELETE CASCADE
clause.
*/
table_info.has_cascade_foreign_key = has_cascade_foreign_key(open_tables);
table_info_holder.push_back(table_info);
}
// Now that one has all the information, one should build the
// data that will be delivered to the plugin
if (table_info_holder.size() > 0) {
number_of_tables = table_info_holder.size();
table_info_list = (Trans_table_info *)my_malloc(
PSI_NOT_INSTRUMENTED, number_of_tables * sizeof(Trans_table_info),
MYF(0));
std::vector<Trans_table_info>::iterator table_info_holder_it =
table_info_holder.begin();
for (int table = 0; table_info_holder_it != table_info_holder.end();
table_info_holder_it++, table++) {
table_info_list[table].number_of_primary_keys =
(*table_info_holder_it).number_of_primary_keys;
table_info_list[table].table_name = (*table_info_holder_it).table_name;
table_info_list[table].db_type = (*table_info_holder_it).db_type;
table_info_list[table].has_cascade_foreign_key =
(*table_info_holder_it).has_cascade_foreign_key;
}
}
}
/**
Helper that gathers all table runtime information
@param[in] thd the current execution thread
@param[out] ctx_info Trans_context_info in which the result is stored.
*/
static void prepare_transaction_context(THD *thd,
Trans_context_info &ctx_info) {
// Extracting the session value of SQL binlogging
ctx_info.binlog_enabled = thd->variables.sql_log_bin;
// Extracting the session value of binlog format
ctx_info.binlog_format = thd->variables.binlog_format;
// Extracting the global mutable value of binlog checksum
ctx_info.binlog_checksum_options = binlog_checksum_options;
// Extracting transaction isolation level
ctx_info.tx_isolation = thd->tx_isolation;
}
int Trans_delegate::before_dml(THD *thd, int &result) {
DBUG_TRACE;
Trans_param param;
TRANS_PARAM_ZERO(param);
param.server_id = thd->server_id;
param.server_uuid = server_uuid;
param.thread_id = thd->thread_id();
prepare_table_info(thd, param.tables_info, param.number_of_tables);
prepare_transaction_context(thd, param.trans_ctx_info);
int ret = 0;
FOREACH_OBSERVER_ERROR_OUT(ret, before_dml, ¶m, result);
my_free(param.tables_info);
return ret;
}
static bool se_before_rollback(THD *, plugin_ref plugin, void *arg) {
handlerton *hton = plugin_data<handlerton *>(plugin);
if (hton->se_before_rollback) hton->se_before_rollback(arg);
return false;
}
int Trans_delegate::before_rollback(THD *thd, bool all) {
DBUG_TRACE;
Trans_param param;
TRANS_PARAM_ZERO(param);
param.server_id = thd->server_id;
param.server_uuid = server_uuid;
param.thread_id = thd->thread_id();
param.rpl_channel_type = thd->rpl_thd_ctx.get_rpl_channel_type();
bool is_real_trans =
(all || !thd->get_transaction()->is_active(Transaction_ctx::SESSION));
if (is_real_trans) param.flags |= TRANS_IS_REAL_TRANS;
int ret = 0;
thd->rpl_thd_ctx.set_tx_rpl_delegate_stage_status(
Rpl_thd_context::TX_RPL_STAGE_BEFORE_ROLLBACK);
FOREACH_OBSERVER(ret, before_rollback, (¶m));
plugin_foreach(thd, se_before_rollback, MYSQL_STORAGE_ENGINE_PLUGIN, ¶m);
return ret;
}
static bool se_after_commit(THD *, plugin_ref plugin, void *arg) {
handlerton *hton = plugin_data<handlerton *>(plugin);
if (hton->se_after_commit) hton->se_after_commit(arg);
return false;
}
int Trans_delegate::after_commit(THD *thd, bool all) {
DBUG_TRACE;
Trans_param param;
TRANS_PARAM_ZERO(param);
param.server_uuid = server_uuid;
param.thread_id = thd->thread_id();
Gtid gtid;
thd->rpl_thd_ctx.last_used_gtid_tracker_ctx().get_last_used_gtid(gtid);
param.gtid_info.sidno = gtid.sidno;
param.gtid_info.gno = gtid.gno;
mysql::gtid::Tsid tsid;
thd->rpl_thd_ctx.last_used_gtid_tracker_ctx().get_last_used_tsid(tsid);
param.gtid_info.tsid = mysql::gtid::Tsid_plain(tsid);
bool is_real_trans =
(all || !thd->get_transaction()->is_active(Transaction_ctx::SESSION));
if (is_real_trans) param.flags |= TRANS_IS_REAL_TRANS;
thd->get_trans_fixed_pos(¶m.log_file, ¶m.log_pos);
param.server_id = thd->server_id;
param.rpl_channel_type = thd->rpl_thd_ctx.get_rpl_channel_type();
DBUG_PRINT("enter",
("log_file: %s, log_pos: %llu", param.log_file, param.log_pos));
DEBUG_SYNC(thd, "before_call_after_commit_observer");
int ret = 0;
FOREACH_OBSERVER(ret, after_commit, (¶m));
plugin_foreach(thd, se_after_commit, MYSQL_STORAGE_ENGINE_PLUGIN, ¶m);
return ret;
}
int Trans_delegate::after_rollback(THD *thd, bool all) {
DBUG_TRACE;
Trans_param param;
TRANS_PARAM_ZERO(param);
param.server_uuid = server_uuid;
param.thread_id = thd->thread_id();
bool is_real_trans =
(all || !thd->get_transaction()->is_active(Transaction_ctx::SESSION));
if (is_real_trans) param.flags |= TRANS_IS_REAL_TRANS;
thd->get_trans_fixed_pos(¶m.log_file, ¶m.log_pos);
param.server_id = thd->server_id;
param.rpl_channel_type = thd->rpl_thd_ctx.get_rpl_channel_type();
int ret = 0;
FOREACH_OBSERVER(ret, after_rollback, (¶m));
return ret;
}
int Trans_delegate::trans_begin(THD *thd, int &out) {
DBUG_TRACE;
if (m_rollback_transaction_on_begin) {
out = ER_OPERATION_NOT_ALLOWED_WHILE_PRIMARY_CHANGE_IS_RUNNING;
return 0;
}
Trans_param param;
TRANS_PARAM_ZERO(param);
param.server_uuid = server_uuid;
param.thread_id = thd->thread_id();
param.group_replication_consistency =
thd->variables.group_replication_consistency;
param.hold_timeout = thd->variables.net_wait_timeout;
param.server_id = thd->server_id;
param.rpl_channel_type = thd->rpl_thd_ctx.get_rpl_channel_type();
param.thd = thd;
int ret = 0;
thd->rpl_thd_ctx.set_tx_rpl_delegate_stage_status(
Rpl_thd_context::TX_RPL_STAGE_BEGIN);
FOREACH_OBSERVER_ERROR_OUT(ret, begin, ¶m, out);
return ret;
}
int Trans_delegate::set_transactions_at_begin_must_fail() {
DBUG_TRACE;
m_rollback_transaction_on_begin = true;
return false;
}
int Trans_delegate::set_no_restrictions_at_transaction_begin() {
DBUG_TRACE;
m_rollback_transaction_on_begin = false;
return false;
}
int Trans_delegate::set_transactions_not_reached_before_commit_must_fail() {
DBUG_TRACE;
m_rollback_transaction_not_reached_before_commit = true;
return false;
}
int Trans_delegate::set_no_restrictions_at_transactions_before_commit() {
DBUG_TRACE;
m_rollback_transaction_not_reached_before_commit = false;
return false;
}
int Binlog_storage_delegate::after_flush(THD *thd, const char *log_file,
my_off_t log_pos) {
DBUG_TRACE;
DBUG_PRINT("enter",
("log_file: %s, log_pos: %llu", log_file, (ulonglong)log_pos));
Binlog_storage_param param;
param.server_id = thd->server_id;
int ret = 0;
FOREACH_OBSERVER(ret, after_flush, (¶m, log_file, log_pos));
return ret;
}
/**
* This hook MUST be invoked after ALL recovery operations are performed
* and the server is ready to serve clients.
*
* @return 0 on success, >0 otherwise.
*/
int Server_state_delegate::before_handle_connection(THD *) {
DBUG_TRACE;
Server_state_param param;
int ret = 0;
FOREACH_OBSERVER(ret, before_handle_connection, (¶m));
return ret;
}
/**
* This hook MUST be invoked before ANY recovery action is started.
*
* @return 0 on success, >0 otherwise.
*/
int Server_state_delegate::before_recovery(THD *) {
DBUG_TRACE;
Server_state_param param;
int ret = 0;
FOREACH_OBSERVER(ret, before_recovery, (¶m));
return ret;
}
/**
* This hook MUST be invoked after the recovery from the engine
* is complete.
*
* @return 0 on success, >0 otherwise.
*/
int Server_state_delegate::after_engine_recovery(THD *) {
DBUG_TRACE;
Server_state_param param;
int ret = 0;
FOREACH_OBSERVER(ret, after_engine_recovery, (¶m));
return ret;
}
/**
* This hook MUST be invoked after the server has completed the
* local recovery. The server can proceed with the further operations
* like engaging in distributed recovery etc.
*
* @return 0 on success, >0 otherwise.
*/
int Server_state_delegate::after_recovery(THD *) {
DBUG_TRACE;
Server_state_param param;
int ret = 0;
FOREACH_OBSERVER(ret, after_recovery, (¶m));
return ret;
}
/**
* This hook MUST be invoked before server shutdown action is
* initiated.
*
* @return 0 on success, >0 otherwise.
*/
int Server_state_delegate::before_server_shutdown(THD *) {
DBUG_TRACE;
Server_state_param param;
int ret = 0;
FOREACH_OBSERVER(ret, before_server_shutdown, (¶m));
return ret;
}
/**
* This hook MUST be invoked after server shutdown operation is
* complete.
*
* @return 0 on success, >0 otherwise.