PREHOOK: query: DESCRIBE FUNCTION dayofmonth
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION dayofmonth
POSTHOOK: type: DESCFUNCTION
dayofmonth(date) - Returns the date of the month of date
PREHOOK: query: DESCRIBE FUNCTION EXTENDED dayofmonth
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED dayofmonth
POSTHOOK: type: DESCFUNCTION
dayofmonth(date) - Returns the date of the month of date
Synonyms: day
date is a string in the format of 'yyyy-MM-dd HH:mm:ss' or 'yyyy-MM-dd'.
Example:
   > SELECT dayofmonth('2009-30-07', 1) FROM src LIMIT 1;
  30