<p>The server refuses to write a statement to the binary log because it touches tables from multiple engines and at least one of them already logs independently.</p>
<p>MySQL Error 1667 ER_BINLOG_MULTIPLE_ENGINES_AND_SELF_LOGGING_ENGINE occurs when a single statement mixes self-logging engines like NDB with other engines, blocking binary logging. Split the statement by engine or disable binlog for the session to resolve the issue.</p>
Cannot execute statement: impossible to write to binary
The error appears with the message Cannot execute statement: impossible to write to binary log since more than one engine is involved and at least one engine is self-logging. It is triggered during statement execution when MySQL must record the operation in the binary log for replication or point-in-time recovery.
The server detects that the statement accesses tables handled by multiple storage engines and that at least one of those engines, such as NDB, manages its own binary logging. Mixing self-logging and regular engines would create duplicate or inconsistent events, so MySQL blocks the write.
MySQL raises error 1667 when a single SQL statement accesses tables from both a self-logging engine (NDB, MyRocks with binlog on, etc.) and a non-self-logging engine (InnoDB, MyISAM, MEMORY). The conflict prevents safe unified binary logging.
The error can also surface if a trigger, foreign key, or stored routine causes hidden access to a different engine within the same statement, silently combining engines.
Split multi-engine operations into separate statements so each statement touches only one engine type. MySQL can then log the events safely.
An alternative is to turn off binary logging for the session with SET sql_log_bin = 0 when replication safety is not required, though this should be limited to maintenance windows.
Updating an InnoDB table while reading from an NDB table in one INSERT ... SELECT triggers the error. Rewrite as two steps: first insert data into a temp InnoDB table, then update the target.
Complex stored procedures sometimes call both NDB and InnoDB tables. Refactor the logic so that NDB operations happen in a separate procedure executed with logging disabled or located on an NDB-only SQL node.
Keep workloads homogeneous by engine within a single statement. Design schemas so that tables participating in frequent joins or DML belong to the same engine family.
Enable static code analysis in Galaxy or your CI pipeline to flag mixed-engine statements before deployment. Galaxy’s AI copilot can suggest rewrites that isolate storage engines per statement.
Error 1888 ER_BINLOG_UNSAFE_STATEMENT warns about unsafe non-transactional changes. The fix is similar: split statements and use transactional engines.
Error 1223 SQLSTATE HY000 sets off when a statement fails inside a stored routine with logging disabled. Re-enable sql_log_bin or restructure the routine.
An INSERT ... SELECT or multi-table UPDATE reads NDB while writing InnoDB, so MySQL blocks logging.
The main table is InnoDB, but a trigger updates an NDB audit table, creating a hidden multi-engine statement.
Engines that emit their own binlog events clash with standard logging when combined with regular engines.
Statement is unsafe for statement-based replication. Fix by switching to row format or rewriting the query.
Occurs when trying to log to a disabled or full binary log. Ensure log_bin is enabled and log file has space.
Engine not supported or disabled. Load the plugin or choose a valid engine.
Yes. Even with row logging, combining self-logging and non-self-logging engines can duplicate events, so MySQL prevents it.
No. The server will block execution until the statement is rewritten or binary logging is disabled for that session.
All GA versions from 5.6 onward that support NDB Cluster or other self-logging engines enforce this restriction.
Galaxy’s AI copilot flags mixed-engine statements in the editor and suggests splitting them, preventing the error before run time.
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