# name: test/sql/aggregate/aggregates/test_regression.test
# description: Test Regression Functions
# group: [aggregates]

statement ok
PRAGMA enable_verification

query I
select regr_avgx(NULL,NULL)
----
NULL

query I
select regr_avgx(1,1)
----
1

#Corner cases
statement error
select regr_avgx()
----

statement error
select regr_avgx(*)
----

statement error
select regr_avgy()
----

query I
select regr_avgy(NULL,NULL)
----
NULL

query I
select regr_avgy(1,1)
----
1

statement error
select regr_avgy(*)
----

statement error
select regr_count()
----

query I
select regr_count(NULL,NULL)
----
0

query I
select regr_count(1,1)
----
1

statement error
select regr_count(*)
----

statement error
select regr_slope()
----

query I
select regr_slope(NULL,NULL)
----
NULL

query I
select regr_slope(1,1)
----
NAN

statement error
select regr_slope(*)
----

statement error
select regr_r2()
----

query I
select regr_r2(NULL,NULL)
----
NULL

query I
select regr_r2(1,1)
----
NULL

#Corner cases
statement error
select regr_r2(0, 1e230*i) from range(5) tbl(i);
----

statement error
select regr_r2(1e230*i, i) from range(5) tbl(i);
----

query I
select regr_r2(1e230*i, 0) from range(5) tbl(i);
----
NULL

query I
select regr_r2(0, i) from range(5) tbl(i);
----
1

statement error
select regr_r2(*)
----

statement error
select regr_sxx()
----

statement error
select regr_sxx(0, 2e230*i) from range(5) tbl(i)
----

query I
select regr_sxx(2e230*i, 0) from range(5) tbl(i)
----
0

query I
select regr_sxx(NULL,NULL)
----
NULL

query I
select regr_sxx(1,1)
----
0

statement error
select regr_syy()
----

query I
select regr_syy(NULL,NULL)
----
NULL

query I
select regr_syy(1,1)
----
0

statement error
select regr_sxy(*)
----

statement error
select regr_sxy()
----

query I
select regr_sxy(NULL,NULL)
----
NULL

query I
select regr_sxy(1,1)
----
0

statement error
select regr_syy(*)
----

statement error
select regr_intercept()
----

query I
select regr_intercept(NULL,NULL)
----
NULL

query I
select regr_intercept(1,1)
----
NULL


statement error
select regr_intercept(*)
----

statement ok
create  table aggr(k int, v decimal(10,2), v2 decimal(10, 2));

statement ok
insert into aggr values(1, 10, null), (2, 10, 11), (2, 20, 22), (2, 25, null), (2, 30, 35);


query II
select k, regr_avgx(v, v2) from aggr group by k ORDER BY ALL;
----
1	NULL
2	22.666667

query II
select k, regr_avgy(v, v2) from aggr group by k ORDER BY ALL;
----
1	NULL
2	20

query III
select k, count(*), regr_count(v, v2) from aggr group by k ORDER BY ALL;
----
1	1	0
2	4	3

query II
select k, regr_slope(v, v2) from aggr group by k ORDER BY ALL;
----
1	NULL
2	0.831409

query II
select k, regr_r2(v, v2) from aggr group by k ORDER BY ALL;
----
1	NULL
2	0.997691

query II
select k, regr_sxx(v, v2) from aggr group by k ORDER BY ALL;
----
1	NULL
2	288.666667

query II
select k, regr_syy(v, v2) from aggr group by k ORDER BY ALL;
----
1	NULL
2	200.000000

query II
select k, regr_sxy(v, v2) from aggr group by k ORDER BY ALL;
----
1	NULL
2	240.000000

query II
select k, regr_intercept(v, v2) from aggr group by k ORDER BY ALL;
----
1	NULL
2	1.154734

query I
select regr_avgx(v, v2) from aggr ;
----
22.666667

query I
select  regr_avgy(v, v2) from aggr ;
----
20

query I
select  regr_count(v, v2) from aggr ;
----
3

query I
select regr_slope(v, v2) from aggr ;
----
0.831409

query I
select regr_r2(v, v2) from aggr ;
----
0.997691

query I
select  regr_sxx(v, v2) from aggr ;
----
288.666667

query I
select regr_syy(v, v2) from aggr ;
----
200.000000

query I
select regr_sxy(v, v2) from aggr;
----
240.000000

query I
select regr_intercept(v, v2) from aggr;
----
1.154734


# Window Function
query I rowsort
select  regr_avgx(v, v2) over (partition by k)
    from aggr;
----
22.666667
22.666667
22.666667
22.666667
NULL

query I rowsort
select  regr_avgy(v, v2) over (partition by k)
    from aggr;
----
20.000000
20.000000
20.000000
20.000000
NULL

query I rowsort
select  regr_count(v, v2) over (partition by k)
    from aggr;
----
0
3
3
3
3

query I rowsort
select  regr_slope(v, v2) over (partition by k)
    from aggr;
----
0.831409
0.831409
0.831409
0.831409
NULL

query I rowsort
select  regr_r2(v, v2) over (partition by k)
    from aggr;
----
0.997691
0.997691
0.997691
0.997691
NULL

query I rowsort
select  regr_sxx(v, v2) over (partition by k)
    from aggr;
----
288.666667
288.666667
288.666667
288.666667
NULL

query I rowsort
select  regr_syy(v, v2) over (partition by k)
    from aggr;
----
200.000000
200.000000
200.000000
200.000000
NULL

query I rowsort
select  regr_sxy(v, v2) over (partition by k)
    from aggr;
----
240.000000
240.000000
240.000000
240.000000
NULL

query I rowsort
select  regr_intercept(v, v2) over (partition by k)
    from aggr;
----
1.154734
1.154734
1.154734
1.154734
NULL