# name: test/sql/collate/test_strpos_collate.test
# description: Test that strpos/instr/position functions properly support COLLATE NOCASE
# group: [collate]

# Test that strpos works with COLLATE NOCASE
query I
SELECT strpos('HELLO' COLLATE NOCASE, 'el')
----
2

# Test with different case combinations
query I
SELECT strpos('HELLO' COLLATE NOCASE, 'EL')
----
2

query I
SELECT strpos('hello' COLLATE NOCASE, 'EL')
----
2

query I
SELECT strpos('HeLLo' COLLATE NOCASE, 'el')
----
2

# Test instr function (alias for strpos)
query I
SELECT instr('HELLO' COLLATE NOCASE, 'el')
----
2

query I
SELECT instr('hello' COLLATE NOCASE, 'EL')
----
2

# Test position function (alias for strpos)
query I
SELECT position('el' IN ('HELLO' COLLATE NOCASE))
----
2

query I
SELECT position('EL' IN ('hello' COLLATE NOCASE))
----
2

# Test edge cases
query I
SELECT strpos('HELLO' COLLATE NOCASE, '')
----
1

query I
SELECT strpos('HELLO' COLLATE NOCASE, 'xyz')
----
0

query I
SELECT strpos('HELLO' COLLATE NOCASE, 'HELLO')
----
1

# Test with longer strings
query I
SELECT strpos('Hello World' COLLATE NOCASE, 'world')
----
7

query I
SELECT strpos('HELLO WORLD' COLLATE NOCASE, 'o w')
----
5

# Test that other string functions still work (regression test)
query T
SELECT contains('HELLO' COLLATE NOCASE, 'hEllO')
----
true

query T
SELECT starts_with('HELLO' COLLATE NOCASE, 'heL')
----
true

# Test with table data
statement ok
CREATE TABLE collate_test(s VARCHAR COLLATE NOCASE)

statement ok
INSERT INTO collate_test VALUES ('Hello World'), ('HELLO WORLD'), ('hElLo WoRlD')

# Test basic functionality
query I
SELECT strpos(s COLLATE NOCASE, 'hello') FROM collate_test ORDER BY s
----
1
1
1

query I
SELECT strpos(s COLLATE NOCASE, 'world') FROM collate_test ORDER BY s
----
7
7
7

# Test with mixed collations
query I
SELECT strpos('HELLO' COLLATE NOCASE, 'el' COLLATE NOCASE)
----
2

query I
SELECT strpos('HELLO' COLLATE NOCASE, 'EL')
----
2

# Test that non-collated versions still work
query I
SELECT strpos('HELLO', 'el')
----
0

query I
SELECT strpos('HELLO', 'EL')
----
2

# Test with empty strings and edge cases
query I
SELECT strpos('' COLLATE NOCASE, '')
----
1

query I
SELECT strpos('' COLLATE NOCASE, 'a')
----
0

query I
SELECT strpos('a' COLLATE NOCASE, '')
----
1

# Test with special characters
query I
SELECT strpos('HéLLO' COLLATE NOCASE, 'éll')
----
2

query I
SELECT strpos('HÉLLO' COLLATE NOCASE, 'éll')
----
2

# Test that the fix doesn't break existing behavior
query I
SELECT strpos('HELLO', 'HELLO')
----
1

query I
SELECT strpos('HELLO', '')
----
1

query I
SELECT strpos('HELLO', 'xyz')
----
0

# Clean up
statement ok
DROP TABLE collate_test