MySQL raises ER_TABLE_CORRUPT (SQLSTATE HY000, error 1877) when it detects that a table file is missing, damaged, or contains invalid data and therefore cannot be accessed.
MySQL error 1877 ER_TABLE_CORRUPT means the referenced table is missing or has damaged metadata or data pages. Run CHECK TABLE, restore from backup, or rebuild the table to clear the corruption and resume normal queries.
ER_TABLE_CORRUPT
Error 1877 appears when MySQL cannot read a table because its .frm, .ibd, or associated index/data pages are damaged, missing, or internally inconsistent.
The server aborts the requested operation and returns SQLSTATE HY000 to protect data integrity. The error was introduced in MySQL 5.7.2 and continues in MySQL 8.x.
The error surfaces during SELECT, INSERT, UPDATE, ALTER, or backup commands that touch the corrupt table. It may also arise during server startup while recovering crashed transactions.
Automated tools such as mysqldump or replication threads will stop on the same error if they reach the damaged object.
A corrupted table risks permanent data loss and replication lag. Production applications may fail, causing downtime and broken dashboards.
Leaving corruption unresolved may cascade into secondary errors like ER_CRASHED_ON_USAGE or inconsistent backups.
Power loss, disk failure, or bad sectors can write partial pages, rendering InnoDB or MyISAM files unreadable.
mysqld killed without clean shutdown can leave un-flushed pages or doublewrite buffer inconsistencies.
Early releases of MySQL 5.7.3-5.7.6 had InnoDB bugs that triggered corruption on heavy DDL.
Copying or deleting .ibd/.frm files directly in the OS bypasses MySQL's metadata management and corrupts the dictionary.
Indicates a MyISAM table marked as crashed; REPAIR TABLE often resolves it.
InnoDB detects checksum mismatch on a single page; require page recovery or full restore.
File pointer mismatch that can follow disk corruption or incorrect permissions.
Minor corruption may be fixed on a replica, then promoted. Direct in-place repair on the primary usually requires maintenance mode.
InnoDB uses redo logs and doublewrite buffer, but physical damage still needs manual intervention.
No. Upgrade keeps data files untouched. Repair or restore first, then upgrade.
Galaxy's AI copilot flags failing queries, and its versioned query history lets teams track when corruption-related errors began, helping pinpoint root causes quickly.
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