只支持none,cluster
const char* const duplicate_scope_strings[] = {"none",
//"zone",
//"region",
"cluster"};
MySQL [test]> CREATE TABLE test (c1 INT PRIMARY KEY, c2 VARCHAR(50)) REPLICA_NUM = 3,DUPLICATE_SCOPE='region';
ERROR 1210 (HY000): Incorrect arguments to duplicate_scope
MySQL [test]> CREATE TABLE test (c1 INT PRIMARY KEY, c2 VARCHAR(50)) REPLICA_NUM = 3,DUPLICATE_SCOPE='zone';
ERROR 1210 (HY000): Incorrect arguments to duplicate_scope