EC
1496
MySQLERRORNotablePartitioningHIGH confidence

Partition info in frm file is inconsistent

Production Risk

High — the table may be inaccessible until repaired.

What this means

ER_INCONSISTENT_PARTITION_INFO_ERROR (1496, SQLSTATE HY000) is raised when the partition metadata stored in the .frm file is inconsistent with the actual table data.

Why it happens
  1. 1Table .frm file was corrupted or manually edited
  2. 2MySQL upgrade left partition metadata in an inconsistent state
  3. 3Incomplete ALTER TABLE operation
How to reproduce
trigger — this will error
trigger — this will error
-- Occurs when accessing a table with corrupt partition metadata
SELECT * FROM partitioned_table;

expected output

ERROR 1496 (HY000): The partition info in the frm file is not consistent with what can be written into the frm file

Fix

Dump and recreate the table

Dump and recreate the table
-- Export the data:
mysqldump mydb partitioned_table > backup.sql

-- Drop and recreate:
DROP TABLE partitioned_table;
-- Then recreate from the original CREATE TABLE statement

Why this works

Recreating the table from scratch resolves .frm metadata inconsistencies.

What not to do

✕

Version notes
MySQL 8.0

.frm files were replaced by the data dictionary; this error is primarily MySQL 5.x.

Sources
Official documentation ↗

MySQL 8.0 — 1496 ER_INCONSISTENT_PARTITION_INFO_ERROR

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