MySQL 8.4 Release Notes
12.3.10 与其他 DBMS 的兼容性
For MaxDB compatibility these two statements are the same:
CREATE TABLE t1 (f1 CHAR(N) UNICODE);
CREATE TABLE t1 (f1 CHAR(N) CHARACTER SET ucs2);
Both the UNICODE
attribute and the ucs2
character set are deprecated; you should expect them to be removed in a future version of MySQL.