REFRESH FUNCTIONS statement
In Impala 2.9 and higher, you can run the REFRESH FUNCTIONS statement
to refresh the user-defined functions (UDFs) created outside of Impala. For example, you can add
Java-based UDFs to the metastore database through the Hive CREATE FUNCTION
statements and make those UDFs visible to Impala at the database level by subsequently running
REFRESH FUNCTIONS.
The REFRESH FUNCTIONS statement is only required if you create or modify UDFs
from outside of Impala. Updated metadata, as a result of running REFRESH
FUNCTIONS, is broadcast to all Impala coordinators.
Once issued, the REFRESH FUNCTIONS statement cannot be cancelled.
Syntax:
REFRESH FUNCTIONS
db_name
