CREATE DATABASE WL6445;
CREATE TABLE WL6445.t1(c1 INT, c2 INT, INDEX sec_idx(c2)) ENGINE=InnoDB;
INSERT INTO WL6445.t1 VALUES(0,0),(1,1),(2,2);
SHOW CREATE TABLE WL6445.t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c1` int(11) DEFAULT NULL,
  `c2` int(11) DEFAULT NULL,
  KEY `sec_idx` (`c2`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SET GLOBAL innodb_fast_shutdown = 0;
# restart: --innodb-read-only
SELECT COUNT(*) FROM WL6445.t1;
COUNT(*)
3
INSERT INTO WL6445.t1 VALUES(3,3);
ERROR HY000: Can't lock file (errno: 165 - Table is read only)
INSERT INTO WL6445.t1 SELECT * FROM WL6445.t1;
ERROR HY000: Table 't1' is read only
REPLACE INTO WL6445.t1 VALUES(1,1);
ERROR HY000: Can't lock file (errno: 165 - Table is read only)
UPDATE WL6445.t1 SET c1 = c1 + 100;
ERROR HY000: Can't lock file (errno: 165 - Table is read only)
DELETE FROM WL6445.t1;
ERROR HY000: Can't lock file (errno: 165 - Table is read only)
ALTER TABLE WL6445.t1 ADD COLUMN c2 INT;
ERROR 42S21: Duplicate column name 'c2'
ALTER TABLE WL6445.t1 ADD UNIQUE INDEX(c1);
ERROR HY000: Running in read-only mode
ALTER TABLE WL6445.t1 DROP INDEX sec_idx;
ERROR HY000: Running in read-only mode
DROP TABLE WL6445.t1;
ERROR HY000: Storage engine can't drop table 'WL6445.t1'
TRUNCATE TABLE WL6445.t1;
ERROR HY000: Table 't1' is read only
RENAME TABLE WL6445.t1 TO WL6444.t2;
ERROR 42000: Unknown database 'WL6444'
DROP DATABASE WL6445;
ERROR HY000: Storage engine can't drop table 'WL6445.t1'
SHOW CREATE TABLE WL6445.t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c1` int(11) DEFAULT NULL,
  `c2` int(11) DEFAULT NULL,
  KEY `sec_idx` (`c2`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
# restart
DROP TABLE WL6445.t1;
DROP DATABASE WL6445;