<p>MySQL error 1616 occurs when an INSERT DELAYED statement targets a table or server version that does not support the DELAYED option.</p>
<p>MySQL Error 1616 ER_DELAYED_NOT_SUPPORTED appears when you run INSERT DELAYED against a table or version that no longer supports the option. Replace INSERT DELAYED with standard INSERT or switch to an engine that allows it to resolve the issue quickly.</p>
DELAYED option not supported for table '%s'
MySQL returns error 1616 (SQLSTATE HY000) with the message DELAYED option not supported for table when an INSERT DELAYED command targets a table or server configuration that cannot use the DELAYED modifier. The statement fails and no rows are written.
The DELAYED keyword once queued inserts for later execution, but support has been removed from MySQL 5.7 and completely eliminated in 8.0. Attempting to use it on any modern server or on engines that never allowed it, such as InnoDB, triggers this error.
The primary cause is issuing INSERT DELAYED on a table that does not accept the option. This happens with InnoDB tables, partitioned tables, temporary tables, or any table when running MySQL 5.7+ with SQL_MODE NO_DELAYED_INSERT or MySQL 8.0 where the feature is gone.
Outdated scripts, legacy ORMs, and copied examples that still reference INSERT DELAYED are frequent triggers. Automated migration tools can also leave the keyword in generated SQL.
Replace INSERT DELAYED with a regular INSERT or INSERT IGNORE statement. If nonblocking behavior is required, rewrite the workload to use asynchronous application logic, message queues, or a different buffering mechanism such as a staging table with bulk inserts.
On MyISAM tables in older MySQL versions where DELAYED is still allowed, ensure the server is started without the NO_DELAYED_INSERT mode. Otherwise, migrate fully away from DELAYED because it is deprecated.
When migrating to MySQL 8.0, legacy PHP code may raise 1616. Search the codebase for INSERT DELAYED and remove it. Galaxy’s AI refactor tool can automate this by scanning and rewriting the SQL.
CI pipelines running integration tests might fail after upgrading the container image. Update test fixtures by stripping the keyword and commit the change.
Audit code for deprecated MySQL syntax before version upgrades. Static analysis or Galaxy’s linting rules will flag uses of INSERT DELAYED early.
Adopt InnoDB for transactional safety and avoid MyISAM-only features like DELAYED. Build application-level queues if you need buffered inserts.
Error 1064 (Syntax Error) can surface if the keyword is partially removed. Error 1289 (Unknown table engine) may appear when converting MyISAM to InnoDB. Address them by correcting syntax and updating engine definitions respectively.
InnoDB, MEMORY, and most modern engines never supported INSERT DELAYED, so any attempt triggers error 1616.
DELAYED was disabled by default in 5.7 and removed in 8.0, causing all uses to fail.
Even in older versions, partitioned or temporary tables reject DELAYED inserts, returning 1616.
Raised when the DELAYED keyword is mistyped or partially removed, indicating invalid SQL syntax.
Occurs after converting MyISAM tables without updating engine references, often seen during the same migrations that expose error 1616.
Appears if duplicate key conflicts arise once DELAYED is removed and records insert immediately.
No. The keyword was removed entirely in MySQL 8.0. Using it will always result in error 1616.
No. DELAYED was deprecated and removed. There is no server option to restore it in current versions.
Use regular INSERT statements with transaction control or adopt a message queue for asynchronous writes.
Galaxy’s AI copilot scans and rewrites legacy INSERT DELAYED statements, and its linter prevents new occurrences from entering your codebase.
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