PREHOOK: query: DESCRIBE FUNCTION last_day
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION last_day
POSTHOOK: type: DESCFUNCTION
last_day(date) - Returns the last day of the month which the date belongs to.
PREHOOK: query: DESCRIBE FUNCTION EXTENDED last_day
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED last_day
POSTHOOK: type: DESCFUNCTION
last_day(date) - Returns the last day of the month which the date belongs to.
date is a string in the format 'yyyy-MM-dd HH:mm:ss' or 'yyyy-MM-dd'. The time part of date is ignored.
Example:
  > SELECT last_day('2009-01-12') FROM src LIMIT 1;
 '2009-01-31'