samples sql rollback error

t_asset_assign rollback generate rollback sql:
UPDATE t_asset_assign SET desc = ?, status = ?, update_time = ?, update_user = ? WHERE id = ?;
reason is that the parameter ‘desc ’ is mysql keyword, suggest to add `` char on rollback sql parameter

Locate the rollback SQL generation involved in t_asset_assign and reproduce the reported UPDATE statement with desc as a MySQL keyword. Verify that the generated rollback SQL quotes that column name and that the resulting statement executes successfully; the issue does not name a file or test to run.

Written by the indexing model from the issue text.