<p>MySQL cannot open the mysql.event system table, blocking the Event Scheduler and any operation that reads or writes events.</p>
<p>MySQL Error 1545: ER_EVENT_OPEN_TABLE_FAILED signals that the server failed to open the mysql.event system table, usually due to corruption, missing privileges, or an upgrade mismatch. Repair or recreate the table, adjust permissions, and restart the Event Scheduler to resolve the issue quickly.</p>
Failed to open mysql.event
Error 1545 occurs when MySQL tries to access the mysql.event system table but cannot open it. The failure stops the Event Scheduler and any statements that reference scheduled events.
The error appears in error logs and client output as “Failed to open mysql.event”. It affects versions 5.1 and later, especially after upgrades or file-system changes.
The Event Scheduler controls recurring tasks such as data cleanup or reporting. When mysql.event is inaccessible, scheduled jobs pause, leading to stale data and missed automations that may impact application logic.
Most cases trace back to corruption, missing privilege grants, or mismatched storage engine definitions after an upgrade or restore.
Verify table existence, repair or recreate it, check privilege grants, and restart the Event Scheduler. SQL examples follow in the next section.
Fresh upgrades, filesystem moves, or partial backups frequently surface this problem. Targeted repairs typically restore normal operation within minutes.
Keep regular backups of mysql schema tables, run mysqlcheck routinely, and validate event privileges after upgrades or restores.
Similar object-access errors include 1544, 1577, and 1557. Understanding their root causes helps resolve 1545 faster.
Storage engine crashes or abrupt shutdowns can corrupt the table structure or data files, preventing the server from opening it.
Manual file deletion, partial backups, or filesystem migrations can remove the frm, ibd, or myd files needed for the table.
The MySQL system user lacks SELECT privilege on mysql.event due to misconfigured grants or security plugins, blocking access.
After major version upgrades, the mysql schema may be out of sync, leaving the event table in an incompatible format.
Changing the default storage engine or disabling InnoDB can make the table engine unavailable, triggering open failures.
Occurs when MySQL cannot write a new event to mysql.event, often following 1545.
Raised when referencing a non-existent event after event table issues.
Appears when an event statement is logged in statement mode where it is not permitted.
Indicates failure to read or write table indexes, sometimes surfacing during event table repairs.
Run SHOW TABLE STATUS or REPAIR TABLE on mysql.event. If MySQL reports errors or hangs, corruption is likely.
You can set GLOBAL event_scheduler=OFF, but scheduled tasks will stop. Fixing the table restores automation and is recommended.
Yes. Export events first with SHOW EVENTS and CREATE EVENT statements, then re-import them after the table is recreated.
Galaxy logs failed DDL statements, surfaces system-table errors in real time, and offers AI guidance on repair steps directly in the SQL editor.
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