Because GTID-based replication is dependent on transactions, some features otherwise available in MySQL are not supported when using it. This section provides information about restrictions on and limitations of replication with GTIDs.
Updates involving nontransactional storage engines.
When using GTIDs, updates to tables using nontransactional
storage engines such as
cannot be made in the same statement or transaction as updates
to tables using transactional storage engines such as
This restriction is due to the fact that updates to tables that use a nontransactional storage engine mixed with updates to tables that use a transactional storage engine within the same transaction can result in multiple GTIDs being assigned to the same transaction.
Such problems can also occur when the master and the slave use different storage engines for their respective versions of the same table, where one storage engine is transactional and the other is not. Also be aware that triggers that are defined to operate on nontransactional tables can be the cause of these problems.
In any of the cases just mentioned, the one-to-one correspondence between transactions and GTIDs is broken, with the result that GTID-based replication cannot function correctly.
CREATE TABLE ... SELECT statements.
TABLE ... SELECT statements are not allowed when using
GTID-based replication. When
binlog_format is set to
CREATE TABLE ... SELECT
statement is recorded in the binary log as one transaction with
one GTID, but if ROW format is used, the statement is recorded
as two transactions with two GTIDs. If a master used STATEMENT
format and a slave used ROW format, the slave would be unable to
handle the transaction correctly, therefore the
TABLE ... SELECT statement is disallowed with GTIDs to
prevent this scenario.
binlog_format is set to
TABLE statements cannot be used inside transactions,
procedures, functions, and triggers when GTIDs are in use on the
server (that is, when the
variable is set to
ON). They can be used
outside these contexts when GTIDs are in use, provided that
autocommit=1 is set. From MySQL
TABLE statements are allowed inside a transaction,
procedure, function, or trigger when GTIDs are in use. The
statements are not written to the binary log and are therefore
not replicated to slaves. The use of row-based replication means
that the slaves remain in sync without the need to replicate
temporary tables. If the removal of these statements from a
transaction results in an empty transaction, the transaction is
not written to the binary log.
Preventing execution of unsupported statements.
To prevent execution of statements that would cause GTID-based
replication to fail, all servers must be started with the
when enabling GTIDs. This causes statements of any of the types
discussed previously in this section to fail with an error.
takes effect if binary logging takes place for a statement. If
binary logging is disabled on the server, or if statements are not
written to the binary log because they are removed by a filter,
GTID consistency is not checked or enforced for the statements
that are not logged.
For information about other required startup options when enabling GTIDs, see Section 2.3.4, “Setting Up Replication Using GTIDs”.
sql_slave_skip_counter is not
supported when using GTIDs. If you need to skip transactions,
use the value of the master's
gtid_executed variable instead.
For instructions, see
Section 2.7.3, “Skipping Transactions”.
The IGNORE_SERVER_IDS option of the
MASTER TO statement is deprecated when using GTIDs,
because transactions that have already been applied are
automatically ignored. Before starting GTID-based replication,
check for and clear all ignored server ID lists that have
previously been set on the servers involved. The
SHOW SLAVE STATUS statement,
which can be issued for individual channels, displays the list
of ignored server IDs if there is one. If there is no list, the
Replicate_Ignore_Server_Ids field is blank.
GTID mode and mysql_upgrade.
Prior to MySQL 8.0.16, when the server is running with global
transaction identifiers (GTIDs) enabled
gtid_mode=ON), do not enable
binary logging by mysql_upgrade (the
--write-binlog option). As
of MySQL 8.0.16, the server performs the entire MySQL upgrade
procedure, but disables binary logging during the upgrade, so
there is no issue.