gistfile1.txt

3e26f1ec41a7:21000] > create table test (a int, b int);
Query: create table test (a int, b int)

Fetched 0 row(s) in 0.77s
[3e26f1ec41a7:21000] > insert into test values (1,2), (3,4);
Query: insert into test values (1,2), (3,4)
Query submitted at: 2018-03-14 14:57:06 (Coordinator: http://3e26f1ec41a7:25000)
select * from test;
Query progress can be monitored at: http://3e26f1ec41a7:25000/query_plan?query_id=8f483cc1be99748d:be8e17e500000000
Modified 2 row(s) in 6.64s
[3e26f1ec41a7:21000] > select * from test;
Query: select * from test
Query submitted at: 2018-03-14 14:57:13 (Coordinator: http://3e26f1ec41a7:25000)
Query progress can be monitored at: http://3e26f1ec41a7:25000/query_plan?query_id=9d401919c0efcf9c:82e5eb4a00000000
+---+---+
| a | b |
+---+---+
| 1 | 2 |
| 3 | 4 |
+---+---+
Fetched 2 row(s) in 0.39s
[3e26f1ec41a7:21000] > alter table test drop column b;
Query: alter table test drop column b

Fetched 0 row(s) in 0.23s
[3e26f1ec41a7:21000] > alter table test add columns (c int);
Query: alter table test add columns (c int)

Fetched 0 row(s) in 0.11s
[3e26f1ec41a7:21000] > select * from test;
Query: select * from test
Query submitted at: 2018-03-14 14:58:15 (Coordinator: http://3e26f1ec41a7:25000)
Query progress can be monitored at: http://3e26f1ec41a7:25000/query_plan?query_id=a14717d4dcb1e06d:d4e9f14500000000
+---+---+
| a | c |
+---+---+
| 1 | 2 |
| 3 | 4 |
+---+---+
Fetched 2 row(s) in 0.13s