<p>MySQL warns that a SQL construct you used is deprecated and will be removed in a future version, urging you to switch to the recommended syntax.</p>
<p>MySQL Error 1554 ER_WARN_DEPRECATED_SYNTAX_WITH_VER signals that the SQL syntax you just ran is deprecated and will disappear in a future MySQL release. Identify the flagged construct, replace it with the suggested alternative, and test the revised statement to clear the warning.</p>
The syntax '%s' is deprecated and will be removed in
MySQL raises error code 1554 (SQLSTATE HY000) as a warning when it detects a keyword, clause, or option that has been marked as deprecated. The server shows the exact fragment and the version in which support disappears.
The complete message follows the pattern: The syntax '%s' is deprecated and will be removed in MySQL %s. Please use %s instead. While not fatal, ignoring it can break applications after an upgrade.
The warning surfaces during statement parsing, typically on CREATE, ALTER, or SET commands that still use legacy options. It can also arise during query execution if outdated JOIN or data type modifiers are present.
Code that compiles with warnings today may fail suddenly after upgrading to the target version. Eliminating deprecated constructs keeps migrations smooth, maintains forward compatibility, and avoids production outages.
Using storage engine specification TYPE = InnoDB instead of ENGINE = InnoDB in CREATE TABLE triggers the warning because TYPE became obsolete after MySQL 4.0.
Old-style implicit JOINs using commas combined with WHERE conditions can raise the warning in MySQL 8.0 because the comma operator is discouraged.
Specifying TIMESTAMP(N) or DECIMAL(M,D) without explicit default values may be flagged in newer versions as display width deprecation.
Read the warning text carefully to pinpoint the offending syntax. Replace it with the recommended form, run the corrected statement, and verify that SHOW WARNINGS returns no rows.
Update stored procedures, application code, and migration scripts to eliminate every deprecated construct before upgrading databases.
CREATE TABLE scripts from MySQL 5.5 often declare TYPE=MyISAM. Change TYPE to ENGINE to remove the warning.
Legacy INSERT statements using DELAYED are deprecated. Remove the DELAYED keyword and batch writes through alternative queuing if necessary.
Run MySQL with sql_mode='ERROR_FOR_DIVISION_BY_ZERO,STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION' plus the versioned SQL mode for the next release to surface deprecations early.
Automate nightly checks with the MySQL Performance Schema deprecation warnings table to catch new issues as schemas evolve.
Error 1287 ER_WARN_DEPRECATED_SYNTAX warns of deprecated features without version info. Treat it the same way: update code promptly.
Error 3750 ER_ALTER_OPERATION_NOT_SUPPORTED reasons appear when attempting unsupported ALTER operations on Partitioned tables. Check documentation and refactor the statement.
CREATE TABLE statements written before MySQL 4.1 may still specify TYPE. MySQL 8.0 marks it deprecated and issues warning 1554.
Queries that join tables with commas in the FROM clause rather than explicit JOIN keywords are signaled as deprecated for future removal.
INTEGER(11) or VARCHAR(255) where the width is ignored in new versions can provoke the warning since width specification will be removed.
INSERT DELAYED was deprecated after MySQL 5.7. Statements still using it generate Error 1554 warnings.
General warning that a feature is deprecated but without version information. Fix by replacing the feature as documented.
Indicates invalid time or date values. Often appears alongside deprecated timestamp syntax updates.
Raised when attempting unsupported ALTER TABLE operations, highlighting required refactoring similar to deprecation fixes.
No. It is a warning, so the statement still executes, but you should update the code to avoid future failures.
Run SHOW WARNINGS right after executing the statement to view the message, level, and code.
Strict mode does not suppress deprecation warnings. They remain visible so you can fix them early.
Yes. Galaxy's editor highlights MySQL warnings in real time and AI copilot suggests the modern replacement instantly.
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