PREHOOK: query: DESCRIBE FUNCTION avg
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION avg
POSTHOOK: type: DESCFUNCTION
avg(x) - Returns the mean of a set of numbers
PREHOOK: query: DESCRIBE FUNCTION EXTENDED avg
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED avg
POSTHOOK: type: DESCFUNCTION
avg(x) - Returns the mean of a set of numbers