NOT_NULL = 1 PRI_KEY = 2 UNIQUE_KEY = 4 MULTIPLE_KEY = 8 BLOB = 16 UNSIGNED = 32 ZEROFILL = 64 BINARY = 128 ENUM = 256 AUTO_INCREMENT = 512 TIMESTAMP = 1024 SET = 2048 PART_KEY = 16384 GROUP = 32767 UNIQUE = 65536