<p>MySQL cannot read data from the referenced table because the underlying table files are likely damaged, missing, or locked by the operating system.</p>
<p>MySQL Error 1728 (ER_CANNOT_LOAD_FROM_TABLE_V2) appears when the server cannot read a table, usually due to file corruption or OS-level locking. Run CHECK TABLE, repair or recreate the table, or restore from backup to resolve the issue.</p>
Cannot load from %s.%s. The table is probably corrupted
MySQL raises error 1728 with the message "Cannot load from %s.%s. The table is probably corrupted" when it fails to read a table’s data or metadata files. The server concludes that the table is unusable and stops the statement to prevent further damage.
The error can interrupt SELECT, INSERT, UPDATE, or replication events because MySQL aborts any operation that needs to open the corrupted table. Fixing it quickly is vital to restore application availability and data integrity.
The most frequent trigger is physical table corruption caused by unexpected shutdowns, disk failures, or file-system inconsistencies. MySQL’s storage engine detects bad page checksums or missing pages and refuses to load the table.
Other causes include incompatible .frm and .ibd pairs after a failed ALTER TABLE, insufficient file permissions, or an external process locking or deleting the table files.
First, isolate the instance by disabling writes to prevent further corruption. Next, verify the table with CHECK TABLE and examine the error output. If MySQL reports recoverable issues, run REPAIR TABLE for MyISAM or use ALTER TABLE ... FORCE for InnoDB to rebuild the table.
If the table is unrecoverable, restore it from the latest backup or export a clean copy from a replica. After recovery, restart the server and validate with SELECT queries to confirm normal operation.
On InnoDB tables, corruption often appears after a power loss. Use the innodb_force_recovery option to start the server, dump the table with mysqldump, and reload it into a fresh instance.
For MyISAM tables, running myisamchk -r on the .MYD and .MYI files can fix index and data errors, then FLUSH TABLES reloads metadata without a full restart.
Deploy redundant power and storage to prevent abrupt shutdowns. Always shut down MySQL gracefully before OS maintenance. Enable binary logging and point-in-time recovery to reduce data loss when corruption happens.
Schedule CHECK TABLE or mysqlcheck during maintenance windows and configure monitoring to alert on early signs such as page checksum warnings in the MySQL error log.
Error 144 (ER_CORRUPT_TABLE) also signals table corruption but is raised by the MyISAM engine. The diagnostic and repair steps mirror those for error 1728.
Error 1812 (ER_ROW_CORRUPT) indicates corrupted data within an InnoDB row. It typically needs the same backup-and-restore approach if ALTER TABLE does not resolve the corruption.
Unclean shutdowns, bad sectors, or a full disk can damage MySQL’s table files, leading to unreadable pages detected at startup.
If the server crashes during DDL, the .frm definition may mismatch the .ibd file, preventing the storage engine from loading the table.
Accidental chmod or chown commands can remove MySQL’s read/write access, making the table appear corrupted.
Backup software or antivirus scanners holding exclusive locks on table files can block MySQL from opening them, triggering the error.
Raised when MyISAM detects corrupt data or index blocks. Repair with myisamchk or REPAIR TABLE.
Indicates corrupted InnoDB row data. Requires backup restore or tablespace rebuild.
Occurs when writes are blocked on a read-only instance. Can appear alongside corruption errors if you enabled read-only mode during recovery.
Run CHECK TABLE or mysqlcheck. The output includes OK, warning, or error lines that confirm corrosion and suggest repair commands.
Values 1-4 let MySQL start in read-only mode to dump data. Higher levels can risk further damage, so switch back to 0 after extracting backups.
REPAIR TABLE only works for MyISAM. For InnoDB use ALTER TABLE ... FORCE or export and import the table.
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