PREHOOK: query: DESCRIBE FUNCTION upper
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION upper
POSTHOOK: type: DESCFUNCTION
upper(str) - Returns str with all characters changed to uppercase
PREHOOK: query: DESCRIBE FUNCTION EXTENDED upper
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED upper
POSTHOOK: type: DESCFUNCTION
upper(str) - Returns str with all characters changed to uppercase
Synonyms: ucase
Example:
  > SELECT upper('Facebook') FROM src LIMIT 1;
  'FACEBOOK'