mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-19 06:50:50 +00:00
19 lines
747 B
SQL
19 lines
747 B
SQL
DROP TABLE IF EXISTS test.sample1;
|
|
DROP TABLE IF EXISTS test.sample2;
|
|
DROP TABLE IF EXISTS test.sample_merge;
|
|
|
|
CREATE TABLE test.sample1 (x UInt64, d Date DEFAULT today()) ENGINE = MergeTree(d, intHash64(x), intHash64(x), 10);
|
|
CREATE TABLE test.sample2 (x UInt64, d Date DEFAULT today()) ENGINE = MergeTree(d, intHash64(x), intHash64(x), 10);
|
|
|
|
INSERT INTO test.sample1 (x) SELECT number AS x FROM system.numbers LIMIT 1000;
|
|
INSERT INTO test.sample2 (x) SELECT number AS x FROM system.numbers LIMIT 2000;
|
|
|
|
CREATE TABLE test.sample_merge AS test.sample1 ENGINE = Merge(test, '^sample\\d$');
|
|
|
|
SET max_threads = 1;
|
|
SELECT _sample_factor FROM merge(test, '^sample\\d$');
|
|
|
|
DROP TABLE test.sample1;
|
|
DROP TABLE test.sample2;
|
|
DROP TABLE test.sample_merge;
|