# name: test/sql/window/test_empty_frames.test
# description: Empty aggregate frames
# group: [window]

statement ok
PRAGMA enable_verification

statement ok
CREATE TABLE t1 (id INTEGER, ch CHAR(1)) ;

statement ok
INSERT INTO t1 VALUES (1, 'A');

statement ok
INSERT INTO t1 VALUES (2, 'B');

statement ok
INSERT INTO t1 VALUES (NULL, 'B');

#
# Original bug report
#

foreach agg count(*) count_star()

query II
SELECT id, ${agg} OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	0
2	1
NULL	0

endloop

#
# All zeroes
#
foreach agg approx_count_distinct count entropy

query II
SELECT id, ${agg}(id) OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	0
2	 0
NULL	0

endloop

#
# All NULLs
#
foreach agg any_value arbitrary avg bit_and bit_or bit_xor favg first fsum group_concat histogram kahan_sum kurtosis last listagg mad max mean median min mode product sem skewness stddev stddev_pop stddev_samp sum sumkahan var_pop var_samp variance

query II
SELECT id, ${agg}(id) OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	NULL
2	NULL
NULL	NULL

endloop

#
# Custom results
#

# Numeric parameter argument
foreach agg approx_quantile quantile quantile_cont quantile_disc reservoir_quantile

query II
SELECT id, ${agg}(id, 0.5) OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	NULL
2	NULL
NULL	NULL

endloop

# Mixed arguments
foreach agg arg_max arg_min argmax argmin max_by min_by

query II
SELECT id, ${agg}(id, ch) OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	NULL
2	NULL
NULL	NULL

endloop

foreach agg array_agg list

query II
SELECT id, ${agg}(id) OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	NULL
2	[NULL]
NULL	NULL

endloop

# Boolean argument
foreach agg bool_and bool_or

query II
SELECT id, ${agg}(id > 0) OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	NULL
2	NULL
NULL	NULL

endloop

# Two numeric arguments =>NULL
foreach agg corr covar_pop covar_samp regr_avgx regr_avgy regr_intercept regr_r2 regr_slope regr_sxx regr_sxy regr_syy

query II
SELECT id, ${agg}(id, id) OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	NULL
2	NULL
NULL	NULL

endloop

# Two numeric arguments => 0
foreach agg regr_count

query II
SELECT id, ${agg}(id, id) OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	0
2	0
NULL	0

endloop

query II
SELECT id, string_agg(id, ' ') OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	NULL
2	NULL
NULL	NULL

query II
SELECT id, bitstring_agg(id, 1, 3) OVER (PARTITION BY ch ORDER BY id ROWS BETWEEN 1 FOLLOWING AND 2 FOLLOWING) 
FROM t1
ORDER BY 1;
----
1	NULL
2	NULL
NULL	NULL