PREHOOK: query: DESCRIBE FUNCTION -
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION -
POSTHOOK: type: DESCFUNCTION
a - b - Returns the difference a-b
PREHOOK: query: DESCRIBE FUNCTION EXTENDED -
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED -
POSTHOOK: type: DESCFUNCTION
a - b - Returns the difference a-b