1CREATE TABLE t1 (a INT, b CHAR(8), PRIMARY KEY (a)) ENGINE=ROCKSDB; 2INSERT INTO t1 (a,b) VALUES (100,'foo'),(2, 'b'); 3CREATE TABLE t2 (a INT, b CHAR(8), PRIMARY KEY (b)) ENGINE=ROCKSDB CHARACTER SET utf8; 4INSERT INTO t2 (a,b) VALUES (1, 'bar'); 5CREATE TABLE t3 (a INT, b CHAR(8), pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=ROCKSDB CHARACTER SET utf8; 6DESCRIBE t1; 7Field Type Null Key Default Extra 8a int(11) NO PRI NULL 9b char(8) YES NULL 10DESC t2 a; 11Field Type Null Key Default Extra 12a int(11) YES NULL 13DESCRIBE t3 '%'; 14Field Type Null Key Default Extra 15a int(11) YES NULL 16b char(8) YES NULL 17pk int(11) NO PRI NULL auto_increment 18DROP TABLE t1, t2, t3; 19