# name: test/sql/function/string/test_reverse.test
# description: REVERSE test
# group: [string]

statement ok
PRAGMA enable_verification

# test reverse on scalars
query TTTT
select REVERSE(''), REVERSE('Hello'), REVERSE('MotörHead'), REVERSE(NULL)
----
(empty)	olleH	daeHrötoM	NULL

# test reverse on tables
statement ok
CREATE TABLE strings(a STRING, b STRING)

statement ok
INSERT INTO strings VALUES ('Hello', 'World'), ('HuLlD', NULL), ('MotörHead','RÄcks'), ('', NULL)

query T
select REVERSE(a) FROM strings
----
olleH
DlLuH
daeHrötoM
(empty)

query T
select REVERSE(b) FROM strings
----
dlroW
NULL
skcÄR
NULL

query T
select REVERSE(a) FROM strings WHERE b IS NOT NULL
----
olleH
daeHrötoM

# test incorrect usage of reverse
statement error
select REVERSE()
----
<REGEX>:^Binder Error: No function matches.*

statement error
select REVERSE(1, 2)
----
<REGEX>:^Binder Error: No function matches.*

statement error
select REVERSE('hello', 'world')
----
<REGEX>:^Binder Error: No function matches.*