====
---- QUERY
# Showing contents of alltypestiny for convenience
select * from alltypestiny
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
2009,3,4,true,0,0,0,0,0,0,'03/01/09','0',2009-03-01 00:00:00
2009,3,5,false,1,1,1,10,1.100000023841858,10.1,'03/01/09','1',2009-03-01 00:01:00
2009,4,6,true,0,0,0,0,0,0,'04/01/09','0',2009-04-01 00:00:00
2009,4,7,false,1,1,1,10,1.100000023841858,10.1,'04/01/09','1',2009-04-01 00:01:00
====
---- QUERY
# Only UNION ALL, no nested unions
select * from alltypestiny where year=2009 and month=1
union all
select * from alltypestiny where year=2009 and month=1
union all
select * from alltypestiny where year=2009 and month=2
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Only UNION ALL with limit inside operands. One of the operands also has an order by.
select * from alltypestiny where year=2009 and month=1 limit 1
union all
select * from alltypestiny where year=2009 and month=1 order by int_col limit 1
union all
select * from alltypestiny where year=2009 and month=2 limit 1
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
====
---- QUERY
# Only UNION DISTINCT, no nested unions
select * from alltypestiny where year=2009 and month=1
union distinct
select * from alltypestiny where year=2009 and month=1
union distinct
select * from alltypestiny where year=2009 and month=2
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Only UNION ALL, mixed selects with and without from clauses, no nested unions
select * from alltypestiny where year=2009 and month=1
union all
select 2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',cast('2009-01-01 00:00:00' as timestamp)
union all
select * from alltypestiny where year=2009 and month=1
union all
select 2009,1,1,false,1,1,1,10,1.1,10.1,'01/01/09','1',cast('2009-01-01 00:01:00' as timestamp)
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, double, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.1,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
====
---- QUERY
# Only UNION DISTINCT, mixed selects with and without from clauses, no nested unions
select * from alltypestiny where year=2009 and month=1
union distinct
select 2009,1,0,true,0,0,0,0,cast(0 as float),0,'01/01/09','0',cast('2009-01-01 00:00:00' as timestamp)
union distinct
select * from alltypestiny where year=2009 and month=1
union distinct
select 2009,1,1,false,1,1,1,10,cast(1.1 as float),10.1,'01/01/09','1',cast('2009-01-01 00:01:00' as timestamp)
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
====
---- QUERY
# Mixed UNION ALL/DISTINCT but effectively only UNION DISTINCT, no nested unions,
# with order by and limit
select * from alltypestiny where year=2009 and month=1
union all
select * from alltypestiny where year=2009 and month=1
union all
select * from alltypestiny where year=2009 and month=2
union distinct
(select * from alltypestiny where year=2009 and month=2)
order by 3 limit 3
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
====
---- QUERY
# Mixed UNION ALL/DISTINCT, no nested unions, with order by and limit
select * from alltypestiny where year=2009 and month=1
union distinct
select * from alltypestiny where year=2009 and month=1
union all
select * from alltypestiny where year=2009 and month=2
union all
(select * from alltypestiny where year=2009 and month=2)
order by 3,4 limit 3
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
====
---- QUERY
# Mixed UNION ALL/DISTINCT, no nested unions, with order by and limit
select * from alltypestiny where year=2009 and month=1
union all
select * from alltypestiny where year=2009 and month=1
union distinct
select * from alltypestiny where year=2009 and month=2
union all
(select * from alltypestiny where year=2009 and month=2)
order by 3,4 limit 4
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
====
---- QUERY
# Union unnesting: Only UNION ALL, first operand is nested
(select * from alltypestiny where year=2009 and month=1
 union all
 select * from alltypestiny where year=2009 and month=2)
union all
select * from alltypestiny where year=2009 and month=1
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: Only UNION ALL, second operand is nested
select * from alltypestiny where year=2009 and month=1
union all
  (select * from alltypestiny where year=2009 and month=1
   union all
   select * from alltypestiny where year=2009 and month=2)
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: Only UNION DISTINCT, first operand is nested
(select * from alltypestiny where year=2009 and month=1
 union distinct
 select * from alltypestiny where year=2009 and month=2)
union distinct
select * from alltypestiny where year=2009 and month=1
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: Only UNION DISTINCT, second operand is nested
select * from alltypestiny where year=2009 and month=1
union distinct
  (select * from alltypestiny where year=2009 and month=1
   union distinct
   select * from alltypestiny where year=2009 and month=2)
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: UNION ALL doesn't absorb nested union with DISTINCT, 
# first operand is nested
(select * from alltypestiny where year=2009 and month=1
 union distinct
 select * from alltypestiny where year=2009 and month=2)
union all
select * from alltypestiny where year=2009 and month=1  
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: UNION ALL doesn't absorb nested union with DISTINCT,
# second operand is nested
select * from alltypestiny where year=2009 and month=1
union all
  (select * from alltypestiny where year=2009 and month=1
   union distinct
   select * from alltypestiny where year=2009 and month=2)
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: UNION ALL absorbs the children but not directly the operands 
# of a nested union with mixed ALL/DISTINCT, first operand is nested
(select * from alltypestiny where year=2009 and month=1
 union distinct
 select * from alltypestiny where year=2009 and month=2
 union all
 select * from alltypestiny where year=2009 and month=2)
union all
select * from alltypestiny where year=2009 and month=1
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: UNION ALL absorbs the children but not directly the operands 
# of a nested union with mixed ALL/DISTINCT, second operand is nested
select * from alltypestiny where year=2009 and month=1
union all
  (select * from alltypestiny where year=2009 and month=1
   union distinct
   select * from alltypestiny where year=2009 and month=2
   union all
   select * from alltypestiny where year=2009 and month=2)
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: UNION ALL doesn't absorb the children of a nested union  
# with mixed ALL/DISTINCT and limit, second operand is nested
select * from alltypestiny where year=2009 and month=1
union all
  (select * from alltypestiny where year=2009 and month=1
   union distinct
   select * from alltypestiny where year=2009 and month=2
   union all
   (select * from alltypestiny where year=2009 and month=2)
   limit 10)
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: UNION ALL doesn't absorb nested union with order by and limit,
# first operand is nested
(select * from alltypestiny where year=2009 and month=1
 union all
 (select * from alltypestiny where year=2009 and month=2)
 order by 3 limit 3)
union all
select * from alltypestiny where year=2009 and month=1  
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
====
---- QUERY
# Union unnesting: UNION ALL doesn't absorb nested union with order by and limit,
# second operand is nested
select * from alltypestiny where year=2009 and month=1
union all
  (select * from alltypestiny where year=2009 and month=1
   union all
   (select * from alltypestiny where year=2009 and month=2)
   order by 3 limit 3)
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
====
---- QUERY
# Union unnesting: UNION DISTINCT absorbs nested union with ALL
# first operand is nested
(select * from alltypestiny where year=2009 and month=1
 union all
 select * from alltypestiny where year=2009 and month=2)
union distinct
select * from alltypestiny where year=2009 and month=1
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: UNION DISTINCT absorbs nested union with ALL,
# second operand is nested
select * from alltypestiny where year=2009 and month=1
union distinct
  (select * from alltypestiny where year=2009 and month=1
   union all
   select * from alltypestiny where year=2009 and month=2)
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: UNION DISTINCT absorbs nested union with mixed ALL/DISTINCT,
# first operand is nested
(select * from alltypestiny where year=2009 and month=1
 union distinct
 select * from alltypestiny where year=2009 and month=2
 union all
 select * from alltypestiny where year=2009 and month=2)
union distinct
select * from alltypestiny where year=2009 and month=1
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: UNION DISTINCT absorbs nested union with mixed ALL/DISTINCT,
# second operand is nested
select * from alltypestiny where year=2009 and month=1
union distinct
  (select * from alltypestiny where year=2009 and month=1
   union distinct
   select * from alltypestiny where year=2009 and month=2
   union all
   select * from alltypestiny where year=2009 and month=2)
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
====
---- QUERY
# Union unnesting: UNION DISTINCT doesn't absorb nested union with order by and limit,
# first operand is nested
(select * from alltypestiny where year=2009 and month=1
 union all
 (select * from alltypestiny where year=2009 and month=2)
 order by 3 limit 3)
union distinct
select * from alltypestiny where year=2009 and month=1  
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
====
---- QUERY
# Union unnesting: UNION DISTINCT doesn't absorb nested union with order by and limit,
# first operand is nested
(select * from alltypestiny where year=2009 and month=1
 union all
 (select * from alltypestiny where year=2009 and month=2)
 order by 3 limit 3)
union distinct
select * from alltypestiny where year=2009 and month=1  
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
====
---- QUERY
# Complex union unnesting: Multiple levels of UNION ALL, fully unnestable
select * from alltypestiny where year=2009 and month=1
union all
  (select * from alltypestiny where year=2009 and month=1
   union all
     (select * from alltypestiny where year=2009 and month=2
      union all
        (select * from alltypestiny where year=2009 and month=2
         union all
         select * from alltypestiny where year=2009 and month=3)))
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
2009,3,4,true,0,0,0,0,0,0,'03/01/09','0',2009-03-01 00:00:00
2009,3,5,false,1,1,1,10,1.100000023841858,10.1,'03/01/09','1',2009-03-01 00:01:00
====
---- QUERY
# Complex union unnesting: Multiple levels of UNION DISTINCT, fully unnestable
select * from alltypestiny where year=2009 and month=1
union distinct
  (select * from alltypestiny where year=2009 and month=1
   union distinct
     (select * from alltypestiny where year=2009 and month=2
      union distinct
        (select * from alltypestiny where year=2009 and month=2
         union distinct
         select * from alltypestiny where year=2009 and month=3)))
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
2009,3,4,true,0,0,0,0,0,0,'03/01/09','0',2009-03-01 00:00:00
2009,3,5,false,1,1,1,10,1.100000023841858,10.1,'03/01/09','1',2009-03-01 00:01:00
====
---- QUERY
# Complex union unnesting: Partially unnestable up to 2nd level
select * from alltypestiny where year=2009 and month=1
union all
  (select * from alltypestiny where year=2009 and month=1
   union distinct
     (select * from alltypestiny where year=2009 and month=2
      union all
        (select * from alltypestiny where year=2009 and month=2
         union distinct
         (select * from alltypestiny where year=2009 and month=3)
         order by 3 limit 3)))
order by 1, 2, 3
limit 20
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
2009,3,4,true,0,0,0,0,0,0,'03/01/09','0',2009-03-01 00:00:00
====
---- QUERY
# Complex union unnesting: Partially unnestable up to 1st level
select * from alltypestiny where year=2009 and month=1
union distinct
  (select * from alltypestiny where year=2009 and month=1
   union distinct
     (select * from alltypestiny where year=2009 and month=2
      union all
        (select * from alltypestiny where year=2009 and month=2
         union distinct
         (select * from alltypestiny where year=2009 and month=3)
         order by 3 limit 3)))
order by 1, 2, 3
limit 20
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
2009,3,4,true,0,0,0,0,0,0,'03/01/09','0',2009-03-01 00:00:00
====
---- QUERY
# Complex union unnesting: Multiple nested unions to test all rules in a single query
select * from alltypestiny where year=2009 and month=1
union distinct
  (select * from alltypestiny where year=2009 and month=1
   union all
   select * from alltypestiny where year=2009 and month=2)
union distinct
  (select * from alltypestiny where year=2009 and month=2
   union all
   (select * from alltypestiny where year=2009 and month=3)
   order by 3 limit 3)
union all
  (select * from alltypestiny where year=2009 and month=3
   union all
   select * from alltypestiny where year=2009 and month=4)
union all
  (select * from alltypestiny where year=2009 and month=4
   union all
   (select * from alltypestiny where year=2009 and month=5)
   order by 3 limit 3)
order by 1, 2, 3
limit 20
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
2009,2,3,false,1,1,1,10,1.100000023841858,10.1,'02/01/09','1',2009-02-01 00:01:00
2009,3,4,true,0,0,0,0,0,0,'03/01/09','0',2009-03-01 00:00:00
2009,3,4,true,0,0,0,0,0,0,'03/01/09','0',2009-03-01 00:00:00
2009,3,5,false,1,1,1,10,1.100000023841858,10.1,'03/01/09','1',2009-03-01 00:01:00
2009,4,6,true,0,0,0,0,0,0,'04/01/09','0',2009-04-01 00:00:00
2009,4,6,true,0,0,0,0,0,0,'04/01/09','0',2009-04-01 00:00:00
2009,4,7,false,1,1,1,10,1.100000023841858,10.1,'04/01/09','1',2009-04-01 00:01:00
2009,4,7,false,1,1,1,10,1.100000023841858,10.1,'04/01/09','1',2009-04-01 00:01:00
====
---- QUERY
# UNION ALL in subquery
select x.* from
  (select * from alltypestiny where year=2009 and month=1
   union all
   select * from alltypestiny where year=2009 and month=1) x
union all
(select * from alltypestiny where year=2009 and month=2)
order by 3 limit 5
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
====
---- QUERY
# UNION DISTINCT in subquery
select x.* from
  (select * from alltypestiny where year=2009 and month=1
   union distinct
   select * from alltypestiny where year=2009 and month=1) x
union distinct
(select * from alltypestiny where year=2009 and month=2)
order by 3 limit 3
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS
2009,1,0,true,0,0,0,0,0,0,'01/01/09','0',2009-01-01 00:00:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,2,2,true,0,0,0,0,0,0,'02/01/09','0',2009-02-01 00:00:00
====
---- QUERY
# UNION ALL in subquery with a WHERE condition in the outer select.
select x.* from
  (select * from alltypestiny where year=2009 and month=1
   union all
   select * from alltypestiny where year=2009 and month=1) x
where x.int_col < 5 and x.bool_col = false
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS: VERIFY_IS_EQUAL_SORTED
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
====
---- QUERY
# UNION DISTINCT in subquery with a WHERE condition in the outer select.
select x.* from
  (select * from alltypestiny where year=2009 and month=1
   union distinct
   select * from alltypestiny where year=2009 and month=1) x
where x.int_col < 5 and x.bool_col = false
---- TYPES
int, int, int, boolean, tinyint, smallint, int, bigint, float, double, string, string, timestamp
---- RESULTS
2009,1,1,false,1,1,1,10,1.100000023841858,10.1,'01/01/09','1',2009-01-01 00:01:00
====
---- QUERY
# Test UNION ALL with mixed constant and non-constant selects. Also tests implicit casts.
select 10, 10.0, "abcde"
union all
select int_col, float_col, string_col
from alltypestiny where year=2009 and month=1
union all
select 20, 20.0, "fghijkl"
union all
select tinyint_col, double_col, string_col
from alltypestiny where year=2009 and month=1
---- TYPES
int, double, string
---- RESULTS: VERIFY_IS_EQUAL_SORTED
0,0,'0'
0,0,'0'
1,1.100000023841858,'1'
1,10.1,'1'
10,10,'abcde'
20,20,'fghijkl'
====
---- QUERY
# Test UNION ALL on large tables with a few constant selects to excercise backend logic.
select count(*) from (  
  select * from alltypes
  union all
  select 2009,1,0,true,0,0,0,0,cast(0 as float),0,'01/01/09','0',cast('2009-01-01 00:00:00' as timestamp)
  union all  
  select * from alltypes
  union all
  select 2009,1,1,false,1,1,1,10,cast(1.1 as float),10.1,'01/01/09','1',cast('2009-01-01 00:01:00' as timestamp)
  union all
  select 2009,1,2,true,2,2,2,20,cast(2.2 as float),20.2,'01/01/09','2',cast('2009-01-01 00:02:00.10' as timestamp)
) x
---- TYPES
bigint
---- RESULTS
14603
====
---- QUERY
# Test UNION DISTINCT on large tables with a few constant selects to excercise backend logic.
select count(*) from (  
  select * from alltypes
  union distinct
  select 2009,1,0,true,0,0,0,0,cast(0 as float),0,'01/01/09','0',cast('2009-01-01 00:00:00' as timestamp)
  union distinct  
  select * from alltypes
  union distinct
  select 2009,1,1,false,1,1,1,10,cast(1.1 as float),10.1,'01/01/09','1',cast('2009-01-01 00:01:00' as timestamp)
  union distinct
  select 2009,1,2,true,2,2,2,20,cast(2.2 as float),20.2,'01/01/09','2',cast('2009-01-01 00:02:00.10' as timestamp)
) x
---- TYPES
bigint
---- RESULTS
7300
====
---- QUERY
# UNION ALL with only constant selects
select 1, 'a', NULL, 10.0f
union all
select 2, 'b', NULL, 20.0f
union all
select 3, 'c', NULL, 30.0f
---- TYPES
tinyint, string, boolean, float
---- RESULTS: VERIFY_IS_EQUAL_SORTED
1,'a',NULL,10.0
2,'b',NULL,20.0
3,'c',NULL,30.0
====
---- QUERY
# UNION DISTINCT with only constant selects
select 1, 'a', NULL, 10.0f
union distinct
select 2, 'b', NULL, 20.0f
union distinct
select 1, 'a', NULL, 10.0f
---- TYPES
tinyint, string, boolean, float
---- RESULTS: VERIFY_IS_EQUAL_SORTED
1,'a',NULL,10.0
2,'b',NULL,20.0
====