mysql字符集不一致导致索引失效

EXPLAIN

查看表字符集

SHOW TABLE STATUS LIKE '%rms%';

查看列字符集

show full columns from t_user;

alter table rms_xxx convert to character set 'utf8mb4';

EXPLAIN

修改表字符集

ALTER TABLE t_user CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci; 

修改列字符集

ALTER TABLE t_user MODIFY name VARCHAR(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;

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