--
-- WINDOW FUNCTIONS
--
CREATE TEMPORARY TABLE empsalary (
    depname varchar,
    empno bigint,
    salary int,
    enroll_date date
);
INSERT INTO empsalary VALUES
('develop', 10, 5200, '2007-08-01'),
('sales', 1, 5000, '2006-10-01'),
('personnel', 5, 3500, '2007-12-10'),
('sales', 4, 4800, '2007-08-08'),
('personnel', 2, 3900, '2006-12-23'),
('develop', 7, 4200, '2008-01-01'),
('develop', 9, 4500, '2008-01-01'),
('sales', 3, 4800, '2007-08-01'),
('develop', 8, 6000, '2006-10-01'),
('develop', 11, 5200, '2007-08-15');
-- empty window specification
SELECT COUNT(*) OVER () FROM tenk1 WHERE unique2 < 10;
SELECT COUNT(*) OVER w FROM tenk1 WHERE unique2 < 10 WINDOW w AS ();
-- no window operation
SELECT four FROM tenk1 WHERE FALSE WINDOW w AS (PARTITION BY ten);
SELECT row_number() OVER (ORDER BY unique2) FROM tenk1 WHERE unique2 < 10;
SELECT count(*) OVER (PARTITION BY four), four FROM (SELECT * FROM tenk1 WHERE two = 1)s WHERE unique2 < 10;
-- opexpr with different windows evaluation.
SELECT * FROM(
  SELECT count(*) OVER (PARTITION BY four ORDER BY ten) +
    sum(hundred) OVER (PARTITION BY two ORDER BY ten) AS total,
    count(*) OVER (PARTITION BY four ORDER BY ten) AS fourcount,
    sum(hundred) OVER (PARTITION BY two ORDER BY ten) AS twosum
    FROM tenk1
)sub
WHERE total <> fourcount + twosum;
-- identical windows with different names
SELECT sum(salary) OVER w1, count(*) OVER w2
FROM empsalary WINDOW w1 AS (ORDER BY salary), w2 AS (ORDER BY salary);
-- empty table
SELECT count(*) OVER (PARTITION BY four) FROM (SELECT * FROM tenk1 WHERE FALSE)s;
-- window function with ORDER BY an expression involving aggregates (9.1 bug)
select ten,
  sum(unique1) + sum(unique2) as res,
  rank() over (order by sum(unique1) + sum(unique2)) as rank
from tenk1
group by ten order by ten;
SELECT sum(unique1) over (rows between current row and unbounded following),
	unique1, four
FROM tenk1 WHERE unique1 < 10;
SELECT sum(unique1) over (rows between 2 preceding and 2 following),
	unique1, four
FROM tenk1 WHERE unique1 < 10;
SELECT sum(unique1) over (rows between 2 preceding and 2 following exclude no others),
	unique1, four
FROM tenk1 WHERE unique1 < 10;
SELECT sum(unique1) over (rows between 2 preceding and 1 preceding),
	unique1, four
FROM tenk1 WHERE unique1 < 10;
SELECT sum(unique1) over (rows between 1 following and 3 following),
	unique1, four
FROM tenk1 WHERE unique1 < 10;
SELECT sum(unique1) over (rows between unbounded preceding and 1 following),
	unique1, four
FROM tenk1 WHERE unique1 < 10;
-- Test in_range for other numeric datatypes
create temp table numerics(
    id int,
    f_float4 float4,
    f_float8 float8,
    f_numeric numeric
);
insert into numerics values
(0, '-infinity', '-infinity', '-infinity'),
(1, -3, -3, -3),
(2, -1, -1, -1),
(3, 0, 0, 0),
(4, 1.1, 1.1, 1.1),
(5, 1.12, 1.12, 1.12),
(6, 2, 2, 2),
(7, 100, 100, 100),
(8, 'infinity', 'infinity', 'infinity'),
(9, 'NaN', 'NaN', 'NaN');
-- Test in_range for other datetime datatypes
create temp table datetimes(
    id int,
    f_time time,
    f_timetz timetz,
    f_interval interval,
    f_timestamptz timestamptz,
    f_timestamp timestamp
);
-- Show differences in offset interpretation between ROWS, RANGE, and GROUPS
WITH cte (x) AS (
        SELECT * FROM generate_series(1, 35, 2)
)
SELECT x, (sum(x) over w)
FROM cte
WINDOW w AS (ORDER BY x rows between 1 preceding and 1 following);
WITH cte (x) AS (
        select 1 union all select 1 union all select 1 union all
        SELECT * FROM generate_series(5, 49, 2)
)
SELECT x, (sum(x) over w)
FROM cte
WINDOW w AS (ORDER BY x rows between 1 preceding and 1 following);
-- with UNION
SELECT count(*) OVER (PARTITION BY four) FROM (SELECT * FROM tenk1 UNION ALL SELECT * FROM tenk2)s LIMIT 0;
-- check some degenerate cases
create temp table t1 (f1 int, f2 int8);
insert into t1 values (1,1),(1,2),(2,2);
-- ordering by a non-integer constant is allowed
SELECT rank() OVER (ORDER BY length('abc'));
SELECT * FROM rank() OVER (ORDER BY random());
SELECT rank() OVER (PARTITION BY four, ORDER BY ten) FROM tenk1;
-- cleanup
DROP TABLE empsalary;
--
-- Test various built-in aggregates that have moving-aggregate support
--
-- test inverse transition functions handle NULLs properly
SELECT i,AVG(v::bigint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,1),(2,2),(3,NULL),(4,NULL)) t(i,v);
SELECT i,AVG(v::int) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,1),(2,2),(3,NULL),(4,NULL)) t(i,v);
SELECT i,AVG(v::smallint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,1),(2,2),(3,NULL),(4,NULL)) t(i,v);
SELECT i,AVG(v::numeric) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,1.5),(2,2.5),(3,NULL),(4,NULL)) t(i,v);
SELECT i,SUM(v::smallint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,1),(2,2),(3,NULL),(4,NULL)) t(i,v);
SELECT i,SUM(v::int) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,1),(2,2),(3,NULL),(4,NULL)) t(i,v);
SELECT i,SUM(v::bigint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,1),(2,2),(3,NULL),(4,NULL)) t(i,v);
SELECT i,SUM(v::numeric) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,1.1),(2,2.2),(3,NULL),(4,NULL)) t(i,v);
SELECT SUM(n::numeric) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,1.01),(2,2),(3,3)) v(i,n);
SELECT i,COUNT(*) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,1),(2,2),(3,NULL),(4,NULL)) t(i,v);
SELECT VAR_SAMP(n::bigint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT VAR_SAMP(n::int) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT VAR_SAMP(n::smallint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT VAR_SAMP(n::numeric) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT VARIANCE(n::bigint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT VARIANCE(n::int) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT VARIANCE(n::smallint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT VARIANCE(n::numeric) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT STDDEV_SAMP(n::bigint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,NULL),(2,600),(3,470),(4,170),(5,430),(6,300)) r(i,n);
SELECT STDDEV_SAMP(n::int) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,NULL),(2,600),(3,470),(4,170),(5,430),(6,300)) r(i,n);
SELECT STDDEV_SAMP(n::smallint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,NULL),(2,600),(3,470),(4,170),(5,430),(6,300)) r(i,n);
SELECT STDDEV_SAMP(n::numeric) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(1,NULL),(2,600),(3,470),(4,170),(5,430),(6,300)) r(i,n);
SELECT STDDEV(n::bigint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(0,NULL),(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT STDDEV(n::int) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(0,NULL),(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT STDDEV(n::smallint) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(0,NULL),(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
SELECT STDDEV(n::numeric) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
  FROM (VALUES(0,NULL),(1,600),(2,470),(3,170),(4,430),(5,300)) r(i,n);
-- test that inverse transition functions work with various frame options
SELECT i,SUM(v::int) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND CURRENT ROW)
  FROM (VALUES(1,1),(2,2),(3,NULL),(4,NULL)) t(i,v);
SELECT i,SUM(v::int) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND 1 FOLLOWING)
  FROM (VALUES(1,1),(2,2),(3,NULL),(4,NULL)) t(i,v);
SELECT i,SUM(v::int) OVER (ORDER BY i ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
  FROM (VALUES(1,1),(2,2),(3,3),(4,4)) t(i,v);
-- ensure aggregate over numeric properly recovers from NaN values
SELECT a, b,
       SUM(b) OVER(ORDER BY A ROWS BETWEEN 1 PRECEDING AND CURRENT ROW)
FROM (VALUES(1,1::numeric),(2,2),(3,'NaN'),(4,3),(5,4)) t(a,b);
-- It might be tempting for someone to add an inverse trans function for
-- float and double precision. This should not be done as it can give incorrect
-- results. This test should fail if anyone ever does this without thinking too
-- hard about it.
SELECT to_char(SUM(n::float8) OVER (ORDER BY i ROWS BETWEEN CURRENT ROW AND 1 FOLLOWING),'999999999999999999999D9')
  FROM (VALUES(1,1e20),(2,1)) n(i,n);
SELECT i, b, bool_and(b) OVER w, bool_or(b) OVER w
  FROM (VALUES (1,true), (2,true), (3,false), (4,false), (5,true)) v(i,b)
  WINDOW w AS (ORDER BY i ROWS BETWEEN CURRENT ROW AND 1 FOLLOWING);