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https://github.com/ClickHouse/ClickHouse.git
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113 lines
4.2 KiB
SQL
113 lines
4.2 KiB
SQL
-- Tags: use-rocksdb
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DROP TABLE IF EXISTS rdb;
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DROP TABLE IF EXISTS t2;
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CREATE TABLE rdb ( `key` UInt32, `value` String )
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ENGINE = EmbeddedRocksDB PRIMARY KEY key;
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INSERT INTO rdb VALUES (1, 'a'), (2, 'b'), (3, 'c'), (4, 'd'), (5, 'e');
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CREATE TABLE t2 ( `k` UInt16 ) ENGINE = TinyLog;
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INSERT INTO t2 VALUES (4), (5), (6);
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SELECT value == 'default' FROM system.settings WHERE name = 'join_algorithm';
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SELECT countIf(explain like '%Algorithm: DirectKeyValueJoin%'), countIf(explain like '%Algorithm: HashJoin%') FROM (
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EXPLAIN PLAN actions = 1
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SELECT * FROM ( SELECT k AS key FROM t2 ) AS t2
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INNER JOIN rdb ON rdb.key = t2.key
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ORDER BY key ASC
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);
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SET join_algorithm = 'direct, hash';
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SELECT value == 'direct,hash' FROM system.settings WHERE name = 'join_algorithm';
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SELECT countIf(explain like '%Algorithm: DirectKeyValueJoin%'), countIf(explain like '%Algorithm: HashJoin%') FROM (
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EXPLAIN PLAN actions = 1
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SELECT * FROM ( SELECT k AS key FROM t2 ) AS t2
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INNER JOIN rdb ON rdb.key = t2.key
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ORDER BY key ASC
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);
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SET join_algorithm = 'hash, direct';
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SELECT value == 'hash,direct' FROM system.settings WHERE name = 'join_algorithm';
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SELECT countIf(explain like '%Algorithm: DirectKeyValueJoin%'), countIf(explain like '%Algorithm: HashJoin%') FROM (
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EXPLAIN PLAN actions = 1
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SELECT * FROM ( SELECT k AS key FROM t2 ) AS t2
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INNER JOIN rdb ON rdb.key = t2.key
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ORDER BY key ASC
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);
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SET join_algorithm = 'grace_hash,hash';
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SELECT value == 'grace_hash,hash' FROM system.settings WHERE name = 'join_algorithm';
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SELECT countIf(explain like '%Algorithm: GraceHashJoin%'), countIf(explain like '%Algorithm: HashJoin%') FROM (
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EXPLAIN PLAN actions = 1
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SELECT * FROM ( SELECT number AS key, number * 10 AS key2 FROM numbers_mt(10) ) AS t1
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JOIN ( SELECT k AS key, k + 100 AS key2 FROM t2 ) AS t2 ON t1.key = t2.key OR t1.key2 = t2.key2
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);
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SELECT countIf(explain like '%Algorithm: GraceHashJoin%'), countIf(explain like '%Algorithm: HashJoin%') FROM (
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EXPLAIN PLAN actions = 1
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SELECT * FROM ( SELECT number AS key, number * 10 AS key2 FROM numbers_mt(10) ) AS t1
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JOIN ( SELECT k AS key, k + 100 AS key2 FROM t2 ) AS t2 ON t1.key = t2.key
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);
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SET join_algorithm = 'grace_hash, hash, auto';
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SELECT value = 'grace_hash,hash,auto' FROM system.settings WHERE name = 'join_algorithm';
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DROP DICTIONARY IF EXISTS dict;
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DROP TABLE IF EXISTS src;
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CREATE TABLE src (id UInt64, s String) ENGINE = MergeTree ORDER BY id
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AS SELECT number, toString(number) FROM numbers(1000000);
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CREATE DICTIONARY dict(
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id UInt64,
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s String
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) PRIMARY KEY id
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SOURCE(CLICKHOUSE(TABLE 'src' DB currentDatabase()))
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LIFETIME (MIN 0 MAX 0)
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LAYOUT(HASHED());
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SET join_algorithm = 'default';
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SELECT countIf(explain like '%Algorithm: DirectKeyValueJoin%'), countIf(explain like '%Algorithm: HashJoin%') FROM (
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EXPLAIN actions = 1
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SELECT s FROM (SELECT toUInt64(9911) id) t1 INNER JOIN dict t2 USING (id)
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);
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SET join_algorithm = 'direct,hash';
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SELECT countIf(explain like '%Algorithm: DirectKeyValueJoin%'), countIf(explain like '%Algorithm: HashJoin%') FROM (
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EXPLAIN actions = 1
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SELECT s FROM (SELECT toUInt64(9911) id) t1 INNER JOIN dict t2 USING (id)
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);
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SET join_algorithm = 'hash,direct';
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SELECT countIf(explain like '%Algorithm: DirectKeyValueJoin%'), countIf(explain like '%Algorithm: HashJoin%') FROM (
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EXPLAIN actions = 1
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SELECT s FROM (SELECT toUInt64(9911) id) t1 INNER JOIN dict t2 USING (id)
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);
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SET join_algorithm = 'grace_hash';
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-- Cannot execute the grace hash with OR condition
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SELECT * FROM ( SELECT number AS key, number * 10 AS key2 FROM numbers_mt(10) ) AS t1
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JOIN ( SELECT k AS key, k + 100 AS key2 FROM t2 ) AS t2 ON t1.key = t2.key OR t1.key2 = t2.key2; -- { serverError NOT_IMPLEMENTED }
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-- But for CROSS choose `hash` algorithm even though it's not enabled
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SELECT * FROM ( SELECT number AS key, number * 10 AS key2 FROM numbers_mt(10) ) AS t1
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CROSS JOIN ( SELECT k AS key, k + 100 AS key2 FROM t2 ) AS t2 FORMAT Null
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SETTINGS enable_analyzer = 1;
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-- ... (not for old analyzer)
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SELECT * FROM ( SELECT number AS key, number * 10 AS key2 FROM numbers_mt(10) ) AS t1
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CROSS JOIN ( SELECT k AS key, k + 100 AS key2 FROM t2 ) AS t2 FORMAT Null
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SETTINGS enable_analyzer = 0; -- { serverError NOT_IMPLEMENTED }
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