mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-25 00:52:02 +00:00
138 lines
5.1 KiB
SQL
138 lines
5.1 KiB
SQL
DROP TABLE IF EXISTS test_table;
|
|
CREATE TABLE test_table
|
|
(
|
|
`timestamp` DateTime,
|
|
`value` UInt64,
|
|
`day` Date ALIAS toDate(timestamp),
|
|
`day1` Date ALIAS day + 1,
|
|
`day2` Date ALIAS day1 + 1,
|
|
`time` DateTime ALIAS timestamp
|
|
)
|
|
ENGINE = MergeTree
|
|
PARTITION BY toYYYYMMDD(timestamp)
|
|
ORDER BY timestamp SETTINGS index_granularity = 1;
|
|
|
|
|
|
INSERT INTO test_table(timestamp, value) SELECT toDateTime('2020-01-01 12:00:00'), 1 FROM numbers(10);
|
|
INSERT INTO test_table(timestamp, value) SELECT toDateTime('2020-01-02 12:00:00'), 1 FROM numbers(10);
|
|
INSERT INTO test_table(timestamp, value) SELECT toDateTime('2020-01-03 12:00:00'), 1 FROM numbers(10);
|
|
|
|
set optimize_respect_aliases = 1;
|
|
SELECT 'test-partition-prune';
|
|
|
|
SELECT COUNT() = 10 FROM test_table WHERE day = '2020-01-01' SETTINGS max_rows_to_read = 10;
|
|
SELECT t = '2020-01-03' FROM (SELECT day AS t FROM test_table WHERE t = '2020-01-03' GROUP BY t SETTINGS max_rows_to_read = 10);
|
|
SELECT COUNT() = 10 FROM test_table WHERE day = '2020-01-01' UNION ALL SELECT 1 FROM numbers(1) SETTINGS max_rows_to_read = 11;
|
|
SELECT COUNT() = 0 FROM (SELECT toDate('2019-01-01') AS day, day AS t FROM test_table PREWHERE t = '2020-01-03' WHERE t = '2020-01-03' GROUP BY t );
|
|
|
|
|
|
|
|
SELECT 'test-join';
|
|
SELECT day = '2020-01-03'
|
|
FROM
|
|
(
|
|
SELECT toDate('2020-01-03') AS day
|
|
FROM numbers(1)
|
|
) AS a
|
|
INNER JOIN
|
|
(
|
|
SELECT day
|
|
FROM test_table
|
|
WHERE day = '2020-01-03'
|
|
GROUP BY day
|
|
) AS b ON a.day = b.day SETTINGS max_rows_to_read = 11;
|
|
|
|
SELECT day = '2020-01-01'
|
|
FROM
|
|
(
|
|
SELECT day
|
|
FROM test_table
|
|
WHERE day = '2020-01-01'
|
|
GROUP BY day
|
|
) AS a
|
|
INNER JOIN
|
|
(
|
|
SELECT toDate('2020-01-01') AS day
|
|
FROM numbers(1)
|
|
) AS b ON a.day = b.day SETTINGS max_rows_to_read = 11;
|
|
|
|
|
|
SELECT 'alias2alias';
|
|
SELECT COUNT() = 10 FROM test_table WHERE day1 = '2020-01-02' SETTINGS max_rows_to_read = 10;
|
|
SELECT t = '2020-01-03' FROM (SELECT day1 AS t FROM test_table WHERE t = '2020-01-03' GROUP BY t SETTINGS max_rows_to_read = 10);
|
|
SELECT t = '2020-01-03' FROM (SELECT day2 AS t FROM test_table WHERE t = '2020-01-03' GROUP BY t SETTINGS max_rows_to_read = 10);
|
|
SELECT COUNT() = 10 FROM test_table WHERE day1 = '2020-01-03' UNION ALL SELECT 1 FROM numbers(1) SETTINGS max_rows_to_read = 11;
|
|
SELECT COUNT() = 0 FROM (SELECT toDate('2019-01-01') AS day1, day1 AS t FROM test_table PREWHERE t = '2020-01-03' WHERE t = '2020-01-03' GROUP BY t );
|
|
SELECT day1 = '2020-01-04' FROM test_table PREWHERE day1 = '2020-01-04' WHERE day1 = '2020-01-04' GROUP BY day1 SETTINGS max_rows_to_read = 10;
|
|
|
|
|
|
ALTER TABLE test_table add column array Array(UInt8) default [1, 2, 3];
|
|
ALTER TABLE test_table add column struct.key Array(UInt8) default [2, 4, 6], add column struct.value Array(UInt8) alias array;
|
|
|
|
|
|
SELECT 'array-join';
|
|
set max_rows_to_read = 10;
|
|
SELECT count() == 10 FROM test_table WHERE day = '2020-01-01';
|
|
SELECT sum(struct.key) == 30, sum(struct.value) == 30 FROM (SELECT struct.key, struct.value FROM test_table array join struct WHERE day = '2020-01-01');
|
|
|
|
|
|
SELECT 'lambda';
|
|
-- lambda parameters in filter should not be rewrite
|
|
SELECT count() == 10 FROM test_table WHERE arrayMap((day) -> day + 1, [1,2,3]) [1] = 2 AND day = '2020-01-03';
|
|
|
|
set max_rows_to_read = 0;
|
|
|
|
SELECT 'optimize_read_in_order';
|
|
EXPLAIN SELECT day AS s FROM test_table ORDER BY s LIMIT 1 SETTINGS optimize_read_in_order = 0;
|
|
EXPLAIN SELECT day AS s FROM test_table ORDER BY s LIMIT 1 SETTINGS optimize_read_in_order = 1;
|
|
EXPLAIN SELECT toDate(timestamp) AS s FROM test_table ORDER BY toDate(timestamp) LIMIT 1 SETTINGS optimize_read_in_order = 1;
|
|
|
|
|
|
SELECT 'optimize_aggregation_in_order';
|
|
EXPLAIN SELECT day, count() AS s FROM test_table GROUP BY day SETTINGS optimize_aggregation_in_order = 0;
|
|
EXPLAIN SELECT day, count() AS s FROM test_table GROUP BY day SETTINGS optimize_aggregation_in_order = 1;
|
|
EXPLAIN SELECT toDate(timestamp), count() AS s FROM test_table GROUP BY toDate(timestamp) SETTINGS optimize_aggregation_in_order = 1;
|
|
|
|
DROP TABLE test_table;
|
|
|
|
|
|
SELECT 'second-index';
|
|
DROP TABLE IF EXISTS test_index;
|
|
CREATE TABLE test_index
|
|
(
|
|
`key_string` String,
|
|
`key_uint32` ALIAS toUInt32(key_string),
|
|
INDEX idx toUInt32(key_string) TYPE set(0) GRANULARITY 1
|
|
)
|
|
ENGINE = MergeTree
|
|
PARTITION BY tuple()
|
|
PRIMARY KEY tuple()
|
|
ORDER BY key_string SETTINGS index_granularity = 1;
|
|
|
|
INSERT INTO test_index SELECT * FROM numbers(10);
|
|
set max_rows_to_read = 1;
|
|
SELECT COUNT() == 1 FROM test_index WHERE key_uint32 = 1;
|
|
SELECT COUNT() == 1 FROM test_index WHERE toUInt32(key_string) = 1;
|
|
DROP TABLE IF EXISTS test_index;
|
|
|
|
|
|
-- check alias column can be used to match projections
|
|
drop table if exists p;
|
|
create table pd (dt DateTime, i int, dt_m DateTime alias toStartOfMinute(dt)) engine Distributed(test_shard_localhost, currentDatabase(), 'pl');
|
|
create table pl (dt DateTime, i int, projection p (select sum(i) group by toStartOfMinute(dt))) engine MergeTree order by dt;
|
|
|
|
insert into pl values ('2020-10-24', 1);
|
|
|
|
select sum(i) from pd group by dt_m settings allow_experimental_projection_optimization = 1, force_optimize_projection = 1;
|
|
|
|
drop table pd;
|
|
drop table pl;
|
|
|
|
drop table if exists t;
|
|
|
|
create temporary table t (x UInt64, y alias x);
|
|
insert into t values (1);
|
|
select sum(x), sum(y) from t;
|
|
|
|
drop table t;
|