<p>MySQL warns that it ignored an unsupported or redundant option supplied in a statement or startup configuration.</p>
<p>MySQL Error 1618: WARN_OPTION_IGNORED means the server ignored an option it does not support or need, such as an obsolete ROW_FORMAT or engine flag. Remove or replace the option, restart the session, and the warning disappears.</p>
<%s> option ignored
MySQL raises WARN_OPTION_IGNORED when it encounters a table, session, or server option that the current version cannot apply. The server completes the request but logs a warning so you know the option had no effect.
The warning appears in SELECT @@warning_count, SHOW WARNINGS, or the client output. Ignoring the message can hide misconfigurations that lead to slower performance or unexpected defaults.
The warning triggers during CREATE TABLE, ALTER TABLE, SET GLOBAL, mysqld startup, or connection-level commands whenever you pass a deprecated, misspelled, or version-mismatched option.
Because execution continues, the risk is silent failures. Always review warnings in CI pipelines, error logs, and Galaxy’s Results panel.
If MySQL quietly drops a critical option such as ROW_FORMAT=COMPRESSED or --innodb_large_prefix, data storage and performance characteristics change. Eliminating the warning guarantees the server applies the intended configuration.
Fixing the root cause improves portability across environments and simplifies future upgrades.
Passing storage-engine options not supported by the selected engine, e.g., KEY_BLOCK_SIZE with InnoDB.
Using deprecated server parameters after upgrading MySQL, such as --binlog_format in v8.0.
Misspelling system variables in SET statements or configuration files.
Supplying contradictory options where MySQL chooses a default and ignores the extra flag.
Identify the exact option MySQL ignored with SHOW WARNINGS. Cross-check it against the reference manual for the server version in staging and production.
Replace obsolete or unsupported options with the recommended alternative or remove them entirely. Validate by rerunning the statement and confirming warning_count returns 0.
CREATE TABLE with ROW_FORMAT=COMPRESSED on MySQL 8.0 where innodb_file_per_table=OFF will fire the warning. Turn ON file-per-table or drop the row format.
mysqld --log_bin --binlog_format=MIXED on v8.0 raises WARN_OPTION_IGNORED because MIXED was removed. Switch to ROW or STATEMENT modes available.
Keep my.cnf, docker-compose, and Terraform modules version-controlled and validated in CI. Use SELECT VERSION() checks in scripts to apply conditional options.
Leverage Galaxy’s lint-on-save feature to surface MySQL warnings immediately inside the editor, reducing the chance of shipping ignored options.
ER_WARN_DEPRECATED_SYNTAX indicates use of syntax accepted but scheduled for removal, while WARN_OPTION_IGNORED means it already has no effect.
ER_UNKNOWN_SYSTEM_VARIABLE signals a completely unrecognized variable and fails the statement instead of warning.
Options like ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE are ignored when the storage engine or file format does not support them.
Flags removed in newer versions, for example --query_cache_size, are silently dropped and recorded as warnings.
A typo such as log_bin_trust_function_creatorss results in MySQL skipping the unknown option.
Supplying mutually exclusive parameters - e.g., innodb_buffer_pool_size together with innodb_dedicated_server - causes MySQL to pick one and warn.
Alerts you that a feature will be removed in a future release but still executes.
Fails the statement because the variable name does not exist in this version.
Blocks modification of views or derived tables that cannot be updated.
No. The statement completes successfully. Only the specified option is ignored.
You can set sql_notes = 0 for the session, but it is safer to fix the root cause.
The option may have been valid in earlier releases but was removed or renamed. Review the upgrade notes.
Galaxy surfaces MySQL warnings inline after each run and flags them in pull requests, ensuring ignored options are fixed before deployment.
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