New functionality from IMPALA-5259.
Some new syntax for REFRESH page.
Deserves a mention on User-Defined Functions page.
No new reserved word because FUNCTIONS is already in the reserved words list.
Taras Bobrovytsky am I correct to assume that these externally loaded UDFs would have to be Java-based ones? That is, the C++ UDFs would always be created through Impala and Impala would always be aware of them. But Java UDFs could be introduced by CREATE FUNCTION statements in Hive, which would require running REFRESH FUNCTIONS.