Clickhouse: UNION ALL: mismatch size

[kshvakov]

ClickHouse v 1.1.54284 is working fine

Example

CREATE TABLE union_bug (
    Event String,
    Datetime DateTime
) Engine = Memory;

INSERT INTO union_bug VALUES ('A', now()), ('B', now());

SELECT * FROM union_bug WHERE Event = 'A'
UNION ALL 
SELECT * FROM union_bug WHERE Event = 'B'

result

┌─Event─┬────────────Datetime─┐
│ A     │ 2017-11-03 07:45:15 │
└───────┴─────────────────────┘
┌─Event─┬────────────Datetime─┐
│ B     │ 2017-11-03 07:45:15 │
└───────┴─────────────────────┘

1.1.54304/1.1.54310

SELECT *
FROM union_bug 
WHERE Event = 'A'
UNION ALL 
SELECT *
FROM union_bug 
WHERE Event = 'B'

Received exception from server:
Code: 258. DB::Exception: Received from localhost:9000, 127.0.0.1. DB::Exception: Size mismatch in UNION ALL chain. 

It's work

SELECT Event, Datetime FROM union_bug WHERE Event = 'A'
UNION ALL 
SELECT * FROM union_bug WHERE Event = 'B'

It doesn't work

SELECT * FROM union_bug WHERE Event = 'A'
UNION ALL 
SELECT Event, Datetime FROM union_bug WHERE Event = 'B'

[ztlpn]

Confirmed, thanks for a simple and reproducible test case!