CREATE TABLE t1 (n INT, ts TIMESTAMP TIME INDEX);

Affected Rows: 0

INSERT INTO t1 VALUES (1, 1), (2, 2), (3, 3), (4, 4), (5, 5), (6, 6), (7, 7), (8, 8), (9, 9), (10, 10);

Affected Rows: 10

CREATE VIEW IF NOT EXISTS v1 (a) AS SELECT * FROM t1;

Error: 1004(InvalidArguments), Expect 2 columns for view v1, but found 1

CREATE VIEW IF NOT EXISTS v1 (a) AS SELECT n FROM t1;

Affected Rows: 0

SHOW CREATE VIEW v1;

+------+------------------------------------------------------+
| View | Create View                                          |
+------+------------------------------------------------------+
| v1   | CREATE VIEW IF NOT EXISTS v1 (a) AS SELECT n FROM t1 |
+------+------------------------------------------------------+

SELECT * FROM v1;

+----+
| a  |
+----+
| 1  |
| 2  |
| 3  |
| 4  |
| 5  |
| 6  |
| 7  |
| 8  |
| 9  |
| 10 |
+----+

SELECT a FROM v1;

+----+
| a  |
+----+
| 1  |
| 2  |
| 3  |
| 4  |
| 5  |
| 6  |
| 7  |
| 8  |
| 9  |
| 10 |
+----+

SELECT n FROM v1;

Error: 3000(PlanQuery), Failed to plan SQL: No field named n. Valid fields are v1.a.

CREATE OR REPLACE VIEW v1 (a, b) AS SELECT n, n+1 FROM t1;

Affected Rows: 0

SHOW CREATE VIEW v1;

+------+-------------------------------------------------------------+
| View | Create View                                                 |
+------+-------------------------------------------------------------+
| v1   | CREATE OR REPLACE VIEW v1 (a, b) AS SELECT n, n + 1 FROM t1 |
+------+-------------------------------------------------------------+

SELECT * FROM v1;

+----+----+
| a  | b  |
+----+----+
| 1  | 2  |
| 2  | 3  |
| 3  | 4  |
| 4  | 5  |
| 5  | 6  |
| 6  | 7  |
| 7  | 8  |
| 8  | 9  |
| 9  | 10 |
| 10 | 11 |
+----+----+

SELECT * FROM v1 WHERE a > 5;

+----+----+
| a  | b  |
+----+----+
| 6  | 7  |
| 7  | 8  |
| 8  | 9  |
| 9  | 10 |
| 10 | 11 |
+----+----+

SELECT * FROM v1 WHERE b > 5;

+----+----+
| a  | b  |
+----+----+
| 5  | 6  |
| 6  | 7  |
| 7  | 8  |
| 8  | 9  |
| 9  | 10 |
| 10 | 11 |
+----+----+

SELECT a FROM v1;

+----+
| a  |
+----+
| 1  |
| 2  |
| 3  |
| 4  |
| 5  |
| 6  |
| 7  |
| 8  |
| 9  |
| 10 |
+----+

SELECT b FROM v1;

+----+
| b  |
+----+
| 2  |
| 3  |
| 4  |
| 5  |
| 6  |
| 7  |
| 8  |
| 9  |
| 10 |
| 11 |
+----+

SELECT a,b FROM v1;

+----+----+
| a  | b  |
+----+----+
| 1  | 2  |
| 2  | 3  |
| 3  | 4  |
| 4  | 5  |
| 5  | 6  |
| 6  | 7  |
| 7  | 8  |
| 8  | 9  |
| 9  | 10 |
| 10 | 11 |
+----+----+

SELECT n FROM v1;

Error: 3000(PlanQuery), Failed to plan SQL: No field named n. Valid fields are v1.a, v1.b.

SELECT * FROM v1 WHERE n > 5;

Error: 3000(PlanQuery), Failed to plan SQL: No field named n. Valid fields are v1.a, v1.b.

-- test view after altering table t1 --
CREATE OR REPLACE VIEW v1 AS SELECT n, ts FROM t1 LIMIT 5;

Affected Rows: 0

SELECT * FROM v1;

+---+-------------------------+
| n | ts                      |
+---+-------------------------+
| 1 | 1970-01-01T00:00:00.001 |
| 2 | 1970-01-01T00:00:00.002 |
| 3 | 1970-01-01T00:00:00.003 |
| 4 | 1970-01-01T00:00:00.004 |
| 5 | 1970-01-01T00:00:00.005 |
+---+-------------------------+

ALTER TABLE t1 ADD COLUMN s STRING DEFAULT '';

Affected Rows: 0

SELECT * FROM v1;

+---+-------------------------+
| n | ts                      |
+---+-------------------------+
| 1 | 1970-01-01T00:00:00.001 |
| 2 | 1970-01-01T00:00:00.002 |
| 3 | 1970-01-01T00:00:00.003 |
| 4 | 1970-01-01T00:00:00.004 |
| 5 | 1970-01-01T00:00:00.005 |
+---+-------------------------+

ALTER TABLE t1 DROP COLUMN n;

Affected Rows: 0

SELECT * FROM v1;

Error: 1002(Unexpected), Failed to decode DataFusion plan: No field named n. Valid fields are greptime.public.t1.ts, greptime.public.t1.s.

DROP VIEW v1;

Affected Rows: 0

DROP TABLE t1;

Affected Rows: 0