# # Bug #18734396 INNODB IN-PLACE ALTER FAILURES BLOCK FUTURE ALTERS # # Temporary tablename will be unique. This makes sure that future # in-place ALTERs of the same table will not be blocked due to # temporary tablename. # Crash the server in ha_innobase::commit_inplace_alter_table() CREATE TABLE t1 (f1 INT NOT NULL, f2 INT NOT NULL) ENGINE=innodb; SET debug='d,innodb_alter_commit_crash_before_commit'; Warnings: Warning 1287 '@@debug' is deprecated and will be removed in a future release. Please use '@@debug_dbug' instead # Write file to make mysql-test-run.pl expect crash # Execute the statement that causes the crash ALTER TABLE t1 ADD PRIMARY KEY (f2, f1); ERROR HY000: Lost connection to MySQL server during query # Startup the server after the crash # Read and remember the temporary table name show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `f1` int(11) NOT NULL, `f2` int(11) NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1 # Consecutive Alter table does not create same temporary file name ALTER TABLE t1 ADD PRIMARY KEY (f2, f1); # Shutdown the server to allow manual recovery # Manual recovery begin. The dictionary was not updated # and the files were not renamed. The rebuilt table # was left behind on purpose, to faciliate data recovery. # Manual recovery end # Startup the server after manual recovery # Drop the orphaned rebuilt table. show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `f1` int(11) NOT NULL, `f2` int(11) NOT NULL, PRIMARY KEY (`f2`,`f1`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 drop table t1;