MySQL 8.4 Release Notes
LOAD DATA is considered unsafe
for statement-based logging (see
Section 19.2.1.3, “Determination of Safe and Unsafe Statements in Binary Logging”). When
binlog_format=MIXED is set, the
statement is logged in row-based format. When
binlog_format=STATEMENT is set,
note that LOAD DATA does not
generate a warning, unlike other unsafe statements.
If you use LOAD DATA with
binlog_format=STATEMENT, each
replica on which the changes are to be applied creates a
temporary file containing the data. The replica then uses a
LOAD DATA statement to apply the
changes. This temporary file is not encrypted, even if binary
log encryption is active on the source, If encryption is
required, use row-based or mixed binary logging format instead,
for which replicas do not create the temporary file.
If a PRIVILEGE_CHECKS_USER account has been
used to help secure the replication channel (see
Section 19.3.3, “Replication Privilege Checks”), it is strongly
recommended that you log LOAD
DATA operations using row-based binary logging
(binlog_format=ROW). If
REQUIRE_ROW_FORMAT is set for the channel,
row-based binary logging is required. With this logging format,
the FILE privilege is not needed
to execute the event, so do not give the
PRIVILEGE_CHECKS_USER account this privilege.
If you need to recover from a replication error involving a
LOAD DATA INFILE operation logged in
statement format, and the replicated event is trusted, you could
grant the FILE privilege to the
PRIVILEGE_CHECKS_USER account temporarily,
removing it after the replicated event has been applied.
When mysqlbinlog reads log events for
LOAD DATA statements logged in
statement-based format, a generated local file is created in a
temporary directory. These temporary files are not automatically
removed by mysqlbinlog or any other MySQL
program. If you do use LOAD DATA
statements with statement-based binary logging, you should
delete the temporary files yourself after you no longer need the
statement log. For more information, see
Section 6.6.9, “mysqlbinlog — Utility for Processing Binary Log Files”.