SET SQL_MODE="";
create table t1 (c1 int primary key auto_increment, c2 varchar(10)) engine=memory;
Warnings:
Note	1266	Using storage engine MyISAM for table 't1'
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c1` int(11) NOT NULL AUTO_INCREMENT,
  `c2` varchar(10) DEFAULT NULL,
  PRIMARY KEY (`c1`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
set session sql_mode='no_engine_substitution';
create table t2 (c1 int primary key auto_increment, c2 varchar(10)) engine=memory;
ERROR 42000: Unknown storage engine 'MEMORY'
drop table t1;