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set names utf8;
Warnings:
Warning 3719 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
CREATE TABLE t(
a INT AUTO_INCREMENT PRIMARY KEY,
b CHAR(100),
c INT,
z INT,
INDEX idx(b))
ENGINE=InnoDB STATS_PERSISTENT=0;
INSERT INTO t VALUES(0,'x',1, 1);
CREATE UNIQUE INDEX idx1 ON t(c, b);
SELECT * FROM t;
a b c z
1 x 1 1
INSERT INTO t SELECT 0,b,c+1,z+1 FROM t;
select count(*) from t;
count(*)
2
SET GLOBAL innodb_fast_shutdown = 0;
# restart: --innodb-read-only
SET SESSION debug="+d,dict_set_index_corrupted";
check table t;
Table Op Msg_type Msg_text
test.t check Warning InnoDB: The B-tree of index idx1 is corrupted.
test.t check Warning InnoDB: The B-tree of index idx is corrupted.
test.t check error Corrupt
SET SESSION debug="-d,dict_set_index_corrupted";
select c from t;
ERROR HY000: Index idx1 is corrupted
show warnings;
Level Code Message
Warning 180 InnoDB: Index idx1 for table `test`.`t` is marked as corrupted
Error 1712 Index idx1 is corrupted
Error 1712 Index t is corrupted
select * from t use index(primary) where a = 1;
a b c z
1 x 1 1
# restart
DROP INDEX idx ON t;
DROP INDEX idx1 ON t;
drop table t;
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