Oracle创建分区表报错：ORA-14037: 分区 “PART_202108“ 的分区界限过高

创建分区表sql语句如下：create table test.test_r1(id NUMBER(20) not null primary key,name VARCHAR2(20) not null,joindate DATE not null,tel VARCHAR2(12) not null,WORK_DATE VARCHAR2(15)) tablespace testpartition by range(WORK_DATE)(partition part_2020 values