<p>Error 1465 is raised when a CREATE TRIGGER statement targets any system schema table; MySQL forbids triggers on system tables for stability and security.</p>
<p>MySQL Error 1465: ER_NO_TRIGGERS_ON_SYSTEM_SCHEMA occurs when you try to create a trigger on a system schema such as mysql, information_schema, performance_schema, or sys. Switch the table to a user database or redesign the logic with views or application code to resolve the issue.</p>
Triggers can not be created on system tables
The server returns this error when a CREATE TRIGGER, ALTER TRIGGER, or DROP TRIGGER statement references a table in a protected system schema. MySQL blocks the request to protect internal metadata.
System schemas include mysql, information_schema, performance_schema, and sys. Interfering with their tables could jeopardize server stability and data consistency, so trigger creation is disallowed.
The direct cause is an attempt to bind a trigger to a table living in a system schema. This can be intentional or accidental if the wrong database is selected in the session.
Older migration scripts or third-party tools sometimes try to add audit triggers globally and unintentionally include system tables, resulting in error 1465.
Move the logic to a user-defined database. Create the same table structure in your application schema and place the trigger there.
If you only need to read system data, use a view or a SELECT statement instead of a trigger. For write interception, route changes through stored procedures maintained in user schemas.
Running mysqldump with --triggers against all databases may capture system tables. Restore scripts will fail with 1465. Exclude system schemas during dump or restore.
Data-sync tools that scan every table and attach triggers for CDC will fail. Configure a schema exclusion list to prevent attempts on system tables.
Always execute USE your_database before creating triggers to ensure you are in the correct schema.
Adopt naming conventions that separate system integration logic from internal metadata. Automate schema linting in CI pipelines using Galaxy or similar tools to catch improper trigger DDL.
ER_TABLEACCESS_DENIED_ERROR happens when you lack privileges on the target table. Grant proper rights or switch accounts.
ER_PROCACCESS_DENIED_ERROR appears when creating a stored procedure without adequate privileges. Ask an administrator to GRANT CREATE ROUTINE.
Attempting to add audit or replication triggers directly to core privilege tables like mysql.user or mysql.db.
ORMs or migration tools scanning all schemas and blindly issuing CREATE TRIGGER statements.
A session that forgot to switch from the default information_schema database before executing DDL.
Restoring a full-schema dump that includes trigger definitions captured from an earlier MySQL fork that allowed such operations.
Raised when a user lacks sufficient privileges for table operations.
Occurs when permissions are insufficient to create or alter stored routines.
General failure to create a table, often tied to missing storage engine or constraints.
No. MySQL hard-codes this restriction for stability and security purposes.
mysql, information_schema, performance_schema, and sys are treated as system schemas.
Yes. Both forks follow the same rule and will raise an equivalent error code.
Galaxy highlights the active database in the UI and lint-checks DDL before execution, warning when system schemas are targeted.
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