-- String TRIM and PAD function tests
-- TRIM functions
SELECT TRIM('  hello world  ');

+--------------------------------+
| btrim(Utf8("  hello world  ")) |
+--------------------------------+
| hello world                    |
+--------------------------------+

SELECT LTRIM('  hello world  ');

+--------------------------------+
| ltrim(Utf8("  hello world  ")) |
+--------------------------------+
| hello world                    |
+--------------------------------+

SELECT RTRIM('  hello world  ');

+--------------------------------+
| rtrim(Utf8("  hello world  ")) |
+--------------------------------+
|   hello world                  |
+--------------------------------+

-- TRIM with specific characters
SELECT TRIM('x' FROM 'xxxhello worldxxx');

+--------------------------------------------+
| btrim(Utf8("xxxhello worldxxx"),Utf8("x")) |
+--------------------------------------------+
| hello world                                |
+--------------------------------------------+

SELECT LTRIM('hello world', 'hel');

+----------------------------------------+
| ltrim(Utf8("hello world"),Utf8("hel")) |
+----------------------------------------+
| o world                                |
+----------------------------------------+

SELECT RTRIM('hello world', 'dlr');

+----------------------------------------+
| rtrim(Utf8("hello world"),Utf8("dlr")) |
+----------------------------------------+
| hello wo                               |
+----------------------------------------+

-- PAD functions
SELECT LPAD('hello', 10, '*');

+-----------------------------------------+
| lpad(Utf8("hello"),Int64(10),Utf8("*")) |
+-----------------------------------------+
| *****hello                              |
+-----------------------------------------+

SELECT RPAD('hello', 10, '*');

+-----------------------------------------+
| rpad(Utf8("hello"),Int64(10),Utf8("*")) |
+-----------------------------------------+
| hello*****                              |
+-----------------------------------------+

-- Truncate
SELECT LPAD('hello', 3, '*');

+----------------------------------------+
| lpad(Utf8("hello"),Int64(3),Utf8("*")) |
+----------------------------------------+
| hel                                    |
+----------------------------------------+

-- Truncate  
SELECT RPAD('hello', 3, '*');

+----------------------------------------+
| rpad(Utf8("hello"),Int64(3),Utf8("*")) |
+----------------------------------------+
| hel                                    |
+----------------------------------------+

-- PAD with multi-character padding
SELECT LPAD('test', 10, 'ab');

+-----------------------------------------+
| lpad(Utf8("test"),Int64(10),Utf8("ab")) |
+-----------------------------------------+
| abababtest                              |
+-----------------------------------------+

SELECT RPAD('test', 10, 'xy');

+-----------------------------------------+
| rpad(Utf8("test"),Int64(10),Utf8("xy")) |
+-----------------------------------------+
| testxyxyxy                              |
+-----------------------------------------+

-- Test with table data
CREATE TABLE trim_pad_test(s VARCHAR, ts TIMESTAMP TIME INDEX);

Affected Rows: 0

INSERT INTO trim_pad_test VALUES
    ('  hello  ', 1000),
    ('world   ', 2000),
    ('   test', 3000),
    ('no-spaces', 4000),
    ('', 5000),
    (NULL, 6000);

Affected Rows: 6

-- Apply TRIM functions to table data
SELECT s, TRIM(s), LTRIM(s), RTRIM(s) FROM trim_pad_test ORDER BY ts;

+-----------+------------------------+------------------------+------------------------+
| s         | btrim(trim_pad_test.s) | ltrim(trim_pad_test.s) | rtrim(trim_pad_test.s) |
+-----------+------------------------+------------------------+------------------------+
|   hello   | hello                  | hello                  |   hello                |
| world     | world                  | world                  | world                  |
|    test   | test                   | test                   |    test                |
| no-spaces | no-spaces              | no-spaces              | no-spaces              |
|           |                        |                        |                        |
|           |                        |                        |                        |
+-----------+------------------------+------------------------+------------------------+

-- Apply PAD functions
SELECT s, LPAD(TRIM(s), 15, '-'), RPAD(TRIM(s), 15, '+') FROM trim_pad_test WHERE s IS NOT NULL ORDER BY ts;

+-----------+--------------------------------------------------+--------------------------------------------------+
| s         | lpad(btrim(trim_pad_test.s),Int64(15),Utf8("-")) | rpad(btrim(trim_pad_test.s),Int64(15),Utf8("+")) |
+-----------+--------------------------------------------------+--------------------------------------------------+
|   hello   | ----------hello                                  | hello++++++++++                                  |
| world     | ----------world                                  | world++++++++++                                  |
|    test   | -----------test                                  | test+++++++++++                                  |
| no-spaces | ------no-spaces                                  | no-spaces++++++                                  |
|           | ---------------                                  | +++++++++++++++                                  |
+-----------+--------------------------------------------------+--------------------------------------------------+

-- Test with Unicode characters
SELECT TRIM('  中文测试  ');

+-----------------------------+
| btrim(Utf8("  中文测试  ")) |
+-----------------------------+
| 中文测试                    |
+-----------------------------+

SELECT LPAD('🚀', 10, '★');

+--------------------------------------+
| lpad(Utf8("🚀"),Int64(10),Utf8("★")) |
+--------------------------------------+
| ★★★★★★★★★🚀                          |
+--------------------------------------+

SELECT RPAD('café', 8, '•');

+---------------------------------------+
| rpad(Utf8("café"),Int64(8),Utf8("•")) |
+---------------------------------------+
| café••••                              |
+---------------------------------------+

-- Edge cases
SELECT TRIM('');

+-----------------+
| btrim(Utf8("")) |
+-----------------+
|                 |
+-----------------+

SELECT TRIM(NULL);

+-------------+
| btrim(NULL) |
+-------------+
|             |
+-------------+

SELECT LPAD('', 5, '*');

+-----------------------------------+
| lpad(Utf8(""),Int64(5),Utf8("*")) |
+-----------------------------------+
| *****                             |
+-----------------------------------+

SELECT RPAD('', 5, '*');

+-----------------------------------+
| rpad(Utf8(""),Int64(5),Utf8("*")) |
+-----------------------------------+
| *****                             |
+-----------------------------------+

SELECT LPAD('test', 0, '*');

+---------------------------------------+
| lpad(Utf8("test"),Int64(0),Utf8("*")) |
+---------------------------------------+
|                                       |
+---------------------------------------+

SELECT RPAD('test', 0, '*');

+---------------------------------------+
| rpad(Utf8("test"),Int64(0),Utf8("*")) |
+---------------------------------------+
|                                       |
+---------------------------------------+

-- TRIM with various whitespace characters
SELECT TRIM('\t\nhello\r\n\t');

+--------------------------------+
| btrim(Utf8("\t\nhello\r\n\t")) |
+--------------------------------+
| \t\nhello\r\n\t                |
+--------------------------------+

SELECT LTRIM('\t\nhello world');

+--------------------------------+
| ltrim(Utf8("\t\nhello world")) |
+--------------------------------+
| \t\nhello world                |
+--------------------------------+

SELECT RTRIM('hello world\r\n');

+--------------------------------+
| rtrim(Utf8("hello world\r\n")) |
+--------------------------------+
| hello world\r\n                |
+--------------------------------+

-- Custom TRIM characters
CREATE TABLE custom_trim(s VARCHAR, ts TIMESTAMP TIME INDEX);

Affected Rows: 0

INSERT INTO custom_trim VALUES
    ('***hello***', 1000),
    ('---world---', 2000),
    ('abcTESTabc', 3000);

Affected Rows: 3

SELECT s, TRIM('*' FROM s), TRIM('-' FROM s), TRIM('abc' FROM s) FROM custom_trim ORDER BY ts;

+-------------+--------------------------------+--------------------------------+----------------------------------+
| s           | btrim(custom_trim.s,Utf8("*")) | btrim(custom_trim.s,Utf8("-")) | btrim(custom_trim.s,Utf8("abc")) |
+-------------+--------------------------------+--------------------------------+----------------------------------+
| ***hello*** | hello                          | ***hello***                    | ***hello***                      |
| ---world--- | ---world---                    | world                          | ---world---                      |
| abcTESTabc  | abcTESTabc                     | abcTESTabc                     | TEST                             |
+-------------+--------------------------------+--------------------------------+----------------------------------+

DROP TABLE trim_pad_test;

Affected Rows: 0

DROP TABLE custom_trim;

Affected Rows: 0