oracle 19c impdp 18c 报错 （哈哈 具体报错内容不记得了），但hight version impdp low version 如果报错基本情况排除后，一定要注意DST时区版本。
下载DSTv32
补丁进行opatch applu 日志就是将v32的时区文件copy到timezone目录中。
After applying the DST patch, need to upgrade the timezone file by script. Please refer the following link.
https://docs.oracle.com/en/database/oracle/oracle-database/18/nlspg/datetime-data-types-and-time-zone-support.html#GUID-B0ACDB2E-4B49-4EB4-B4CC-9260DAE1567A
4.7 Upgrading the Time Zone File and Timestamp with Time Zone Data
In 18c, there are 2 ways, choose either of them.
Upgrading the Time Zone Data Using the utltz_* Scripts
Upgrading the Time Zone Data Using the DBMS_DST Package
