--- alter table to add new column with default timestamp values aware of session timezone test ---
CREATE TABLE test1 (i INTEGER, j TIMESTAMP time index, PRIMARY KEY(i));

Affected Rows: 0

INSERT INTO test1 values (1, 1), (2, 2);

Affected Rows: 2

SELECT * FROM test1;

+---+-------------------------+
| i | j                       |
+---+-------------------------+
| 1 | 1970-01-01T00:00:00.001 |
| 2 | 1970-01-01T00:00:00.002 |
+---+-------------------------+

--- add ts1 column ---
ALTER TABLE test1 ADD COLUMN ts1 TIMESTAMP DEFAULT '2024-01-30 00:01:01' PRIMARY KEY;

Affected Rows: 0

INSERT INTO test1 values (3, 3, DEFAULT), (4, 4,  '2024-01-31 00:01:01');

Affected Rows: 2

-- SQLNESS SORT_RESULT 3 1
SELECT i, ts1 FROM test1;

+---+---------------------+
| i | ts1                 |
+---+---------------------+
| 1 | 2024-01-30T00:01:01 |
| 2 | 2024-01-30T00:01:01 |
| 3 | 2024-01-30T00:01:01 |
| 4 | 2024-01-31T00:01:01 |
+---+---------------------+

SET time_zone = 'Asia/Shanghai';

Affected Rows: 0

--- add ts2 column, default value is the same as ts1, but with different session timezone ---
ALTER TABLE test1 ADD COLUMN ts2 TIMESTAMP DEFAULT '2024-01-30 00:01:01' PRIMARY KEY;

Affected Rows: 0

INSERT INTO test1 values (5, 5, DEFAULT, DEFAULT), (6, 6, DEFAULT, '2024-01-31 00:01:01');

Affected Rows: 2

-- SQLNESS SORT_RESULT 3 1
SELECT i, ts1, ts2 FROM test1;

+---+---------------------+---------------------+
| i | ts1                 | ts2                 |
+---+---------------------+---------------------+
| 1 | 2024-01-30T00:01:01 | 2024-01-29T16:01:01 |
| 2 | 2024-01-30T00:01:01 | 2024-01-29T16:01:01 |
| 3 | 2024-01-30T00:01:01 | 2024-01-29T16:01:01 |
| 4 | 2024-01-31T00:01:01 | 2024-01-29T16:01:01 |
| 5 | 2024-01-30T00:01:01 | 2024-01-29T16:01:01 |
| 6 | 2024-01-30T00:01:01 | 2024-01-30T16:01:01 |
+---+---------------------+---------------------+

SET time_zone = 'UTC';

Affected Rows: 0

DROP TABLE test1;

Affected Rows: 0