3140
MariaDBWARNINGCriticalDeprecationHIGH confidence
Deprecated syntax used (always deprecated)
Production Risk
Low — warning only; behavior unchanged until the feature is removed.
What this means
A syntax or feature that is permanently deprecated in MySQL 8.0 was used. Unlike warnings that depend on a setting, this warning is always emitted regardless of sql_mode.
Why it happens
- 1Using syntax that was kept for backward compatibility in MySQL 8.0 but is marked for removal in a future version.
How to reproduce
trigger — this will error
trigger — this will error
-- Example: use of deprecated syntax specific to MySQL 8.0
expected output
Warning (Code 3140): Deprecated syntax used.
Fix
Migrate to the recommended syntax
Migrate to the recommended syntax
-- Consult the MySQL 8.0 migration guide for the replacement syntax
Why this works
Eliminates the deprecation warning and future-proofs the query.
What not to do
✕
Version notes
MySQL 8.0
These warnings indicate syntax that will be removed in MySQL 9.0.
Sources
Official documentation ↗
MySQL 8.0 — 3140 ER_WARN_DEPRECATED_SYNTAX_ALWAYS
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