mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-20 00:30:49 +00:00
44 lines
1.6 KiB
SQL
44 lines
1.6 KiB
SQL
DROP TABLE IF EXISTS t_sparse_pk;
|
|
DROP TABLE IF EXISTS t_full_pk;
|
|
|
|
CREATE TABLE t_sparse_pk (k UInt64, s String)
|
|
ENGINE = MergeTree ORDER BY k
|
|
SETTINGS ratio_of_defaults_for_sparse_serialization = 0.0, index_granularity = 1;
|
|
|
|
INSERT INTO t_sparse_pk VALUES (0, 'a'), (0, 'b'), (1, ''), (2, ''), (2, 'e'), (3, 'f'), (4, 'g');
|
|
|
|
SET force_primary_key = 1;
|
|
|
|
SELECT k, s FROM t_sparse_pk WHERE k = 2 ORDER BY k, s;
|
|
SELECT k, s FROM t_sparse_pk WHERE k = 0 OR k = 3 ORDER BY k, s;
|
|
|
|
DROP TABLE IF EXISTS t_sparse_pk;
|
|
|
|
CREATE TABLE t_sparse_pk (k UInt64, v UInt64 CODEC(NONE))
|
|
ENGINE = MergeTree ORDER BY k
|
|
SETTINGS ratio_of_defaults_for_sparse_serialization = 0.0, index_granularity = 30;
|
|
|
|
CREATE TABLE t_full_pk (k UInt64, v UInt64)
|
|
ENGINE = MergeTree ORDER BY k
|
|
SETTINGS ratio_of_defaults_for_sparse_serialization = 1.1, index_granularity = 30;
|
|
|
|
INSERT INTO t_sparse_pk SELECT number % 10, number % 4 = 0 FROM numbers(1000);
|
|
INSERT INTO t_full_pk SELECT number % 10, number % 4 = 0 FROM numbers(1000);
|
|
|
|
INSERT INTO t_sparse_pk SELECT number % 10, number % 6 = 0 FROM numbers(1000);
|
|
INSERT INTO t_full_pk SELECT number % 10, number % 6 = 0 FROM numbers(1000);
|
|
|
|
SELECT count(v), sum(v) FROM t_sparse_pk WHERE k = 0;
|
|
SELECT count(v), sum(v) FROM t_full_pk WHERE k = 0;
|
|
|
|
SELECT count(v), sum(v) FROM t_sparse_pk WHERE k = 0 OR k = 3 OR k = 7 OR k = 8;
|
|
SELECT count(v), sum(v) FROM t_full_pk WHERE k = 0 OR k = 3 OR k = 7 OR k = 8;
|
|
|
|
SET force_primary_key = 0;
|
|
|
|
SELECT (k = NULL) OR (k = 1000) FROM t_sparse_pk LIMIT 3;
|
|
SELECT range(k) FROM t_sparse_pk LIMIT 3;
|
|
|
|
DROP TABLE IF EXISTS t_sparse_pk;
|
|
DROP TABLE IF EXISTS t_full_pk;
|