# name: test/sql/function/string/regex_extract.test
# description: regex extract test
# group: [string]

statement ok
PRAGMA enable_verification

query T
SELECT regexp_extract('foobarbaz', 'b..')
----
bar

query T
SELECT regexp_extract('foobarbaz', 'B..')
----
(empty)

# pass in regex options
query T
SELECT regexp_extract('foobarbaz', 'B..', 0, 'i')
----
bar

query T
SELECT regexp_extract('foobarbaz', 'b..', 1)
----
(empty)

query T
SELECT regexp_extract('foobarbaz', '(b..)(b..)')
----
barbaz

query T
SELECT regexp_extract('foobarbaz', '(b..)(b..)', 1)
----
bar

query T
SELECT regexp_extract('foobarbaz', '(b..)(b..)', 2)
----
baz

statement error
SELECT regexp_extract('foobarbaz', '(b..)(b..)', -1)
----
<REGEX>:.*Invalid Input Error: Group index must be.*

statement error
SELECT regexp_extract('foobarbaz', '(b..)(b..)', 42)
----
<REGEX>:.*Invalid Input Error: Group index must be.*

statement ok
CREATE TABLE test (s VARCHAR, p VARCHAR, i INT)

statement ok
INSERT INTO test VALUES
    ('foobarbaz', 'b..', 0),
    ('foobarbaz', 'b..', 1),
    ('foobarbaz', '(b..)(b..)', 0),
    ('foobarbaz', '(b..)(b..)', 1),
    ('foobarbaz', '(b..)(b..)', 2)

statement error
SELECT regexp_extract(s, p, i) FROM test
----
<REGEX>:.*Invalid Input Error.*must be a constant.*

query T
SELECT regexp_extract(s, p, 0) FROM test
----
bar
bar
barbaz
barbaz
barbaz

query T
SELECT regexp_extract(s, 'b..', 0) FROM test
----
bar
bar
bar
bar
bar

statement error
SELECT regexp_extract(s, '(b..)(b..)', i) FROM test
----
<REGEX>:.*Invalid Input Error.*must be a constant.*

# null values
query T
SELECT regexp_extract('foobarbaz', NULL, 0)
----
NULL

query T
SELECT regexp_extract('foobarbaz', 'b..', NULL)
----
(empty)

query T
SELECT regexp_extract(NULL, 'b..')
----
NULL

statement error
SELECT regexp_extract('foobarbaz', 'b..', '1')
----
<REGEX>:.*Binder Error.*Could not choose a best candidate.*