NOT_NULL_FLAG     745 ext/mysqli/mysqli.c 	REGISTER_LONG_CONSTANT("MYSQLI_NOT_NULL_FLAG", NOT_NULL_FLAG, CONST_CS | CONST_PERSISTENT);
NOT_NULL_FLAG     305 ext/mysqlnd/mysqlnd_enum_n_def.h #define IS_NOT_NULL(n)	((n) & NOT_NULL_FLAG)