ClickHouse/tests/queries/0_stateless/02962_max_joined_block_rows.sql

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

39 lines
1012 B
MySQL
Raw Normal View History

2024-01-08 10:58:26 +00:00
DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
CREATE table t1 (a UInt64, b UInt64) ENGINE = Memory;
INSERT INTO t1 SELECT number % 2, number FROM numbers(10);
CREATE table t2 (a UInt64) ENGINE = Memory;
INSERT INTO t2 SELECT number % 2 FROM numbers(10);
-- block size is always multiple of 5 because we have 5 rows for each key in right table
-- we do not split rows corresponding to the same key
SELECT max(bs) <= 5, b FROM (
SELECT blockSize() as bs, * FROM t1 JOIN t2 ON t1.a = t2.a
) GROUP BY b
ORDER BY b
SETTINGS max_joined_block_size_rows = 5;
SELECT '--';
SELECT max(bs) <= 10, b FROM (
SELECT blockSize() as bs, * FROM t1 JOIN t2 ON t1.a = t2.a
) GROUP BY b
ORDER BY b
SETTINGS max_joined_block_size_rows = 10;
SELECT '--';
-- parallel_hash doen't support max_joined_block_size_rows
SET join_algorithm = 'parallel_hash';
SELECT max(bs) > 10, b FROM (
SELECT blockSize() as bs, * FROM t1 JOIN t2 ON t1.a = t2.a
) GROUP BY b
ORDER BY b
SETTINGS max_joined_block_size_rows = 10;