PREHOOK: query: DESCRIBE FUNCTION trim
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION trim
POSTHOOK: type: DESCFUNCTION
trim(str) - Removes the leading and trailing space characters from str 
PREHOOK: query: DESCRIBE FUNCTION EXTENDED trim
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED trim
POSTHOOK: type: DESCFUNCTION
trim(str) - Removes the leading and trailing space characters from str 
Example:
  > SELECT trim('   facebook  ') FROM src LIMIT 1;
  'facebook'