Semantic changes and workarounds CDP 7.1.4
Review the semantic changes in Hive after migrating to CDP 7.1.4 from CDP 7.1.3. A
link to Apache Hive JIRAs, if there is one, provides more information about the semantic
change. If you are migrating to CDP 7.1.4 from CDH 6.2.1, review the list of Hive changes in
each CDP release prior to CDP 7.1.4.
Exclusive write lock for MERGE INSERT Learn how you can enable EXCLUSIVE (X) lock for the MERGE INSERT operations, which helps in preventing duplicates during concurrent MERGE INSERT operations. Lock implementations to allow zero-wait readers Learn about the implementation changes introduced in locks to allow zero-wait or no-wait readers. You can enable certain properties to ensure that SHARED_READ does not have to wait for any lock and can fail immediately for a pending EXCLUSIVE DDL operation. UNBOUNDED representation in Window functions Learn about the implementation change for the ROWS clause of the Window function. The boundary specification has now been updated to consider the UNBOUNDED representation. Support for 0 ROWS PRECEDING or FOLLOWING Learn about the change that provides support for 0 ROWS PRECEDING or ROWS FOLLOWING in Window function specifications.