1657
MySQLERRORCriticalSchemaHIGH confidence
Table comment is too long
Production Risk
Low — DDL is rejected; table structure is unchanged.
What this means
The COMMENT clause on a CREATE TABLE or ALTER TABLE statement exceeds the maximum allowed length (2048 bytes).
Why it happens
- 1The table COMMENT string is longer than 2048 bytes.
How to reproduce
trigger — this will error
trigger — this will error
-- Table comment exceeding 2048 bytes
expected output
ERROR 1657 (HY000): Comment for table 't' is too long (max = 2048).
Fix
Shorten the table comment
Shorten the table comment
CREATE TABLE t (id INT) COMMENT='Brief description of this table';
Why this works
Keeping the comment within 2048 bytes satisfies the length constraint.
Sources
Official documentation ↗
MySQL 8.0 — 1657 ER_TOO_LONG_TABLE_COMMENT
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