mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-27 01:51:59 +00:00
23 lines
890 B
SQL
23 lines
890 B
SQL
DROP TABLE IF EXISTS min_max_with_nullable_string;
|
|
|
|
CREATE TABLE min_max_with_nullable_string (
|
|
t DateTime,
|
|
nullable_str Nullable(String),
|
|
INDEX nullable_str_min_max nullable_str TYPE minmax GRANULARITY 8192
|
|
) ENGINE = MergeTree ORDER BY (t);
|
|
|
|
INSERT INTO min_max_with_nullable_string(t) VALUES (now()) (now());
|
|
|
|
SELECT count() FROM min_max_with_nullable_string WHERE nullable_str = '.';
|
|
|
|
INSERT INTO min_max_with_nullable_string(t, nullable_str) VALUES (now(), '.') (now(), '.');
|
|
|
|
SELECT count() FROM min_max_with_nullable_string WHERE nullable_str = '.';
|
|
|
|
INSERT INTO min_max_with_nullable_string(t, nullable_str) VALUES (now(), NULL) (now(), '.') (now(), NULL) (now(), '.') (now(), NULL);
|
|
|
|
SELECT count() FROM min_max_with_nullable_string WHERE nullable_str = '.';
|
|
|
|
SELECT count() FROM min_max_with_nullable_string WHERE nullable_str = '';
|
|
|
|
DROP TABLE min_max_with_nullable_string; |