PREHOOK: query: describe function months_between
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: describe function months_between
POSTHOOK: type: DESCFUNCTION
months_between(date1, date2) - returns number of months between dates date1 and date2
PREHOOK: query: desc function extended months_between
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: desc function extended months_between
POSTHOOK: type: DESCFUNCTION
months_between(date1, date2) - returns number of months between dates date1 and date2
If date1 is later than date2, then the result is positive. If date1 is earlier than date2, then the result is negative. If date1 and date2 are either the same days of the month or both last days of months, then the result is always an integer. Otherwise the UDF calculates the fractional portion of the result based on a 31-day month and considers the difference in time components date1 and date2.
date1 and date2 type can be date, timestamp or string in the format 'yyyy-MM-dd' or 'yyyy-MM-dd HH:mm:ss'. The result is rounded to 8 decimal places.
 Example:
  > SELECT months_between('1997-02-28 10:30:00', '1996-10-30');
 3.94959677
PREHOOK: query: --test string format
explain select months_between('1995-02-02', '1995-01-01')
PREHOOK: type: QUERY
POSTHOOK: query: --test string format
explain select months_between('1995-02-02', '1995-01-01')
POSTHOOK: type: QUERY
STAGE DEPENDENCIES:
  Stage-0 is a root stage

STAGE PLANS:
  Stage: Stage-0
    Fetch Operator
      limit: -1
      Processor Tree:
        TableScan
          alias: _dummy_table
          Row Limit Per Split: 1
          Statistics: Num rows: 0 Data size: 1 Basic stats: PARTIAL Column stats: COMPLETE
          Select Operator
            expressions: 1.03225806 (type: double)
            outputColumnNames: _col0
            Statistics: Num rows: 0 Data size: 1 Basic stats: PARTIAL Column stats: COMPLETE
            ListSink

PREHOOK: query: select
  months_between('1995-02-02', '1995-01-01'),
  months_between('2003-07-17', '2005-07-06'),
  months_between('2001-06-30', '2000-05-31'),
  months_between('2000-06-01', '2004-07-01'),
  months_between('2002-02-28', '2002-03-01'),
  months_between('2002-02-31', '2002-03-01'),
  months_between('2012-02-29', '2012-03-01'),
  months_between('2012-02-31', '2012-03-01'),
  months_between('1976-01-01 00:00:00', '1975-12-31 23:59:59'),
  months_between('1976-01-01', '1975-12-31 23:59:59'),
  months_between('1997-02-28 10:30:00', '1996-10-30'),
  -- if both are last day of the month then time part should be ignored
  months_between('2002-03-31', '2002-02-28'),
  months_between('2002-03-31', '2002-02-28 10:30:00'),
  months_between('2002-03-31 10:30:00', '2002-02-28'),
  -- if the same day of the month then time part should be ignored
  months_between('2002-03-24', '2002-02-24'),
  months_between('2002-03-24', '2002-02-24 10:30:00'),
  months_between('2002-03-24 10:30:00', '2002-02-24'),
  -- partial time. time part will be skipped
  months_between('1995-02-02 10:39', '1995-01-01'),
  months_between('1995-02-02', '1995-01-01 10:39'),
  -- no leading 0 for month and day should work
  months_between('1995-02-2', '1995-1-01'),
  months_between('1995-2-02', '1995-01-1'),
  -- short year should work
  months_between('495-2-02', '495-01-1'),
  months_between('95-2-02', '95-01-1'),
  months_between('5-2-02', '5-01-1')
PREHOOK: type: QUERY
PREHOOK: Input: _dummy_database@_dummy_table
#### A masked pattern was here ####
POSTHOOK: query: select
  months_between('1995-02-02', '1995-01-01'),
  months_between('2003-07-17', '2005-07-06'),
  months_between('2001-06-30', '2000-05-31'),
  months_between('2000-06-01', '2004-07-01'),
  months_between('2002-02-28', '2002-03-01'),
  months_between('2002-02-31', '2002-03-01'),
  months_between('2012-02-29', '2012-03-01'),
  months_between('2012-02-31', '2012-03-01'),
  months_between('1976-01-01 00:00:00', '1975-12-31 23:59:59'),
  months_between('1976-01-01', '1975-12-31 23:59:59'),
  months_between('1997-02-28 10:30:00', '1996-10-30'),
  -- if both are last day of the month then time part should be ignored
  months_between('2002-03-31', '2002-02-28'),
  months_between('2002-03-31', '2002-02-28 10:30:00'),
  months_between('2002-03-31 10:30:00', '2002-02-28'),
  -- if the same day of the month then time part should be ignored
  months_between('2002-03-24', '2002-02-24'),
  months_between('2002-03-24', '2002-02-24 10:30:00'),
  months_between('2002-03-24 10:30:00', '2002-02-24'),
  -- partial time. time part will be skipped
  months_between('1995-02-02 10:39', '1995-01-01'),
  months_between('1995-02-02', '1995-01-01 10:39'),
  -- no leading 0 for month and day should work
  months_between('1995-02-2', '1995-1-01'),
  months_between('1995-2-02', '1995-01-1'),
  -- short year should work
  months_between('495-2-02', '495-01-1'),
  months_between('95-2-02', '95-01-1'),
  months_between('5-2-02', '5-01-1')
POSTHOOK: type: QUERY
POSTHOOK: Input: _dummy_database@_dummy_table
#### A masked pattern was here ####
1.03225806	-23.64516129	13.0	-49.0	-0.12903226	0.06451613	-0.09677419	0.03225806	3.7E-7	3.7E-7	3.94959677	1.0	1.0	1.0	1.0	1.0	1.0	1.03225806	1.03225806	1.03225806	1.03225806	1.03225806	1.03225806	1.03225806
PREHOOK: query: --test timestamp format
select
  months_between(cast('1995-02-02 00:00:00' as timestamp), cast('1995-01-01 00:00:00' as timestamp)),
  months_between(cast('2003-07-17 00:00:00' as timestamp), cast('2005-07-06 00:00:00' as timestamp)),
  months_between(cast('2001-06-30 00:00:00' as timestamp), cast('2000-05-31 00:00:00' as timestamp)),
  months_between(cast('2000-06-01 00:00:00' as timestamp), cast('2004-07-01 00:00:00' as timestamp)),
  months_between(cast('2002-02-28 00:00:00' as timestamp), cast('2002-03-01 00:00:00' as timestamp)),
  months_between(cast('2002-02-31 00:00:00' as timestamp), cast('2002-03-01 00:00:00' as timestamp)),
  months_between(cast('2012-02-29 00:00:00' as timestamp), cast('2012-03-01 00:00:00' as timestamp)),
  months_between(cast('2012-02-31 00:00:00' as timestamp), cast('2012-03-01 00:00:00' as timestamp)),
  months_between(cast('1976-01-01 00:00:00' as timestamp), cast('1975-12-31 23:59:59' as timestamp)),
  months_between(cast('1976-01-01' as date), cast('1975-12-31 23:59:59' as timestamp)),
  months_between(cast('1997-02-28 10:30:00' as timestamp), cast('1996-10-30' as date)),
  -- if both are last day of the month then time part should be ignored
  months_between(cast('2002-03-31 00:00:00' as timestamp), cast('2002-02-28 00:00:00' as timestamp)),
  months_between(cast('2002-03-31 00:00:00' as timestamp), cast('2002-02-28 10:30:00' as timestamp)),
  months_between(cast('2002-03-31 10:30:00' as timestamp), cast('2002-02-28 00:00:00' as timestamp)),
  -- if the same day of the month then time part should be ignored
  months_between(cast('2002-03-24 00:00:00' as timestamp), cast('2002-02-24 00:00:00' as timestamp)),
  months_between(cast('2002-03-24 00:00:00' as timestamp), cast('2002-02-24 10:30:00' as timestamp)),
  months_between(cast('2002-03-24 10:30:00' as timestamp), cast('2002-02-24 00:00:00' as timestamp))
PREHOOK: type: QUERY
PREHOOK: Input: _dummy_database@_dummy_table
#### A masked pattern was here ####
POSTHOOK: query: --test timestamp format
select
  months_between(cast('1995-02-02 00:00:00' as timestamp), cast('1995-01-01 00:00:00' as timestamp)),
  months_between(cast('2003-07-17 00:00:00' as timestamp), cast('2005-07-06 00:00:00' as timestamp)),
  months_between(cast('2001-06-30 00:00:00' as timestamp), cast('2000-05-31 00:00:00' as timestamp)),
  months_between(cast('2000-06-01 00:00:00' as timestamp), cast('2004-07-01 00:00:00' as timestamp)),
  months_between(cast('2002-02-28 00:00:00' as timestamp), cast('2002-03-01 00:00:00' as timestamp)),
  months_between(cast('2002-02-31 00:00:00' as timestamp), cast('2002-03-01 00:00:00' as timestamp)),
  months_between(cast('2012-02-29 00:00:00' as timestamp), cast('2012-03-01 00:00:00' as timestamp)),
  months_between(cast('2012-02-31 00:00:00' as timestamp), cast('2012-03-01 00:00:00' as timestamp)),
  months_between(cast('1976-01-01 00:00:00' as timestamp), cast('1975-12-31 23:59:59' as timestamp)),
  months_between(cast('1976-01-01' as date), cast('1975-12-31 23:59:59' as timestamp)),
  months_between(cast('1997-02-28 10:30:00' as timestamp), cast('1996-10-30' as date)),
  -- if both are last day of the month then time part should be ignored
  months_between(cast('2002-03-31 00:00:00' as timestamp), cast('2002-02-28 00:00:00' as timestamp)),
  months_between(cast('2002-03-31 00:00:00' as timestamp), cast('2002-02-28 10:30:00' as timestamp)),
  months_between(cast('2002-03-31 10:30:00' as timestamp), cast('2002-02-28 00:00:00' as timestamp)),
  -- if the same day of the month then time part should be ignored
  months_between(cast('2002-03-24 00:00:00' as timestamp), cast('2002-02-24 00:00:00' as timestamp)),
  months_between(cast('2002-03-24 00:00:00' as timestamp), cast('2002-02-24 10:30:00' as timestamp)),
  months_between(cast('2002-03-24 10:30:00' as timestamp), cast('2002-02-24 00:00:00' as timestamp))
POSTHOOK: type: QUERY
POSTHOOK: Input: _dummy_database@_dummy_table
#### A masked pattern was here ####
1.03225806	-23.64516129	13.0	-49.0	-0.12903226	0.06451613	-0.09677419	0.03225806	3.7E-7	3.7E-7	3.94959677	1.0	1.0	1.0	1.0	1.0	1.0
PREHOOK: query: --test date format
select
  months_between(cast('1995-02-02' as date), cast('1995-01-01' as date)),
  months_between(cast('2003-07-17' as date), cast('2005-07-06' as date)),
  months_between(cast('2001-06-30' as date), cast('2000-05-31' as date)),
  months_between(cast('2000-06-01' as date), cast('2004-07-01' as date)),
  months_between(cast('2002-02-28' as date), cast('2002-03-01' as date)),
  months_between(cast('2002-02-31' as date), cast('2002-03-01' as date)),
  months_between(cast('2012-02-29' as date), cast('2012-03-01' as date)),
  months_between(cast('2012-02-31' as date), cast('2012-03-01' as date))
PREHOOK: type: QUERY
PREHOOK: Input: _dummy_database@_dummy_table
#### A masked pattern was here ####
POSTHOOK: query: --test date format
select
  months_between(cast('1995-02-02' as date), cast('1995-01-01' as date)),
  months_between(cast('2003-07-17' as date), cast('2005-07-06' as date)),
  months_between(cast('2001-06-30' as date), cast('2000-05-31' as date)),
  months_between(cast('2000-06-01' as date), cast('2004-07-01' as date)),
  months_between(cast('2002-02-28' as date), cast('2002-03-01' as date)),
  months_between(cast('2002-02-31' as date), cast('2002-03-01' as date)),
  months_between(cast('2012-02-29' as date), cast('2012-03-01' as date)),
  months_between(cast('2012-02-31' as date), cast('2012-03-01' as date))
POSTHOOK: type: QUERY
POSTHOOK: Input: _dummy_database@_dummy_table
#### A masked pattern was here ####
1.03225806	-23.64516129	13.0	-49.0	-0.12903226	0.06451613	-0.09677419	0.03225806
PREHOOK: query: --test misc with null
select
  months_between(cast(null as string), '2012-03-01'),
  months_between('2012-02-31', cast(null as timestamp)),
  months_between(cast(null as timestamp), cast(null as date)),
  months_between(cast(null as string), cast('2012-03-01 00:00:00' as timestamp)),
  months_between(cast('2012-02-31 00:00:00' as timestamp), cast(null as string)),
  months_between(cast(null as timestamp), cast('2012-03-01' as string)),
  months_between(cast('2012-02-31' as date), cast(null as string)),
  months_between('2012-02-10', cast(null as string)),
  months_between(cast(null as string), '2012-02-10'),
  months_between(cast(null as string), cast(null as string)),
  months_between('2012-02-10', cast(null as timestamp)),
  months_between(cast(null as timestamp), '2012-02-10'),
  months_between(cast(null as timestamp), cast(null as timestamp)),
  -- string dates without day should be parsed to null
  months_between('2012-03', '2012-02-24'),
  months_between('2012-03-24', '2012-02')
PREHOOK: type: QUERY
PREHOOK: Input: _dummy_database@_dummy_table
#### A masked pattern was here ####
POSTHOOK: query: --test misc with null
select
  months_between(cast(null as string), '2012-03-01'),
  months_between('2012-02-31', cast(null as timestamp)),
  months_between(cast(null as timestamp), cast(null as date)),
  months_between(cast(null as string), cast('2012-03-01 00:00:00' as timestamp)),
  months_between(cast('2012-02-31 00:00:00' as timestamp), cast(null as string)),
  months_between(cast(null as timestamp), cast('2012-03-01' as string)),
  months_between(cast('2012-02-31' as date), cast(null as string)),
  months_between('2012-02-10', cast(null as string)),
  months_between(cast(null as string), '2012-02-10'),
  months_between(cast(null as string), cast(null as string)),
  months_between('2012-02-10', cast(null as timestamp)),
  months_between(cast(null as timestamp), '2012-02-10'),
  months_between(cast(null as timestamp), cast(null as timestamp)),
  -- string dates without day should be parsed to null
  months_between('2012-03', '2012-02-24'),
  months_between('2012-03-24', '2012-02')
POSTHOOK: type: QUERY
POSTHOOK: Input: _dummy_database@_dummy_table
#### A masked pattern was here ####
NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL