3246
MariaDBWARNINGNotableSchema / DDLHIGH confidence
mysql.user table has old-length column
Production Risk
Medium — authentication or privilege operations may behave unexpectedly.
How to reproduce
trigger — this will error
trigger — this will error
-- Observed during server startup or privilege operations on un-upgraded servers.
expected output
Warning 3246: Column 'authentication_string' in mysql.user has old definition.
Fix
Run mysql_upgrade
Run mysql_upgrade
-- Shell: mysql_upgrade -u root -p
Why this works
mysql_upgrade updates system tables including mysql.user column definitions.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 3246 ER_USER_COLUMN_OLD_LENGTH
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