Are Hive Components of Different Versions Compatible with Each Other?
Hive 3.1 is incompatible with Hive 1.2 in the following items:
- Strings cannot be converted to int.
- The user-defined functions (UDFs) of the Date type are changed to Hive built-in UDFs.
- Hive 3.1 does not provide the index function anymore.
- Hive 3.1 uses the UTC time in time functions, while Hive 1.2 uses the local time zone.
- The JDBC drivers in Hive 3.1 and Hive 1.2 are incompatible.
- In Hive 3.1, column names in ORC files are case-sensitive and underscores-sensitive.
- Hive 3.1 does not allow columns named time.
Parent topic: MRS Overview