mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-20 16:50:48 +00:00
49 lines
1.3 KiB
SQL
49 lines
1.3 KiB
SQL
SET optimize_on_insert = 0;
|
|
|
|
DROP TABLE IF EXISTS replacing_table;
|
|
|
|
CREATE TABLE replacing_table (a UInt32, b UInt32, c UInt32)
|
|
ENGINE = ReplacingMergeTree ORDER BY a
|
|
SETTINGS vertical_merge_algorithm_min_rows_to_activate = 1,
|
|
vertical_merge_algorithm_min_columns_to_activate = 1,
|
|
index_granularity = 16,
|
|
min_bytes_for_wide_part = 0,
|
|
merge_max_block_size = 16;
|
|
|
|
SYSTEM STOP MERGES replacing_table;
|
|
|
|
INSERT INTO replacing_table SELECT number, number, number from numbers(16);
|
|
INSERT INTO replacing_table SELECT 100, number, number from numbers(16);
|
|
|
|
SELECT sum(a), count() FROM replacing_table;
|
|
|
|
SYSTEM START MERGES replacing_table;
|
|
|
|
OPTIMIZE TABLE replacing_table FINAL;
|
|
|
|
SELECT sum(a), count() FROM replacing_table;
|
|
|
|
DROP TABLE IF EXISTS replacing_table;
|
|
|
|
CREATE TABLE replacing_table
|
|
(
|
|
key UInt64,
|
|
value UInt64
|
|
)
|
|
ENGINE = ReplacingMergeTree
|
|
ORDER BY key
|
|
SETTINGS
|
|
vertical_merge_algorithm_min_rows_to_activate=0,
|
|
vertical_merge_algorithm_min_columns_to_activate=0,
|
|
min_bytes_for_wide_part = 0;
|
|
|
|
INSERT INTO replacing_table SELECT if(number == 8192, 8191, number), 1 FROM numbers(8193);
|
|
|
|
SELECT sum(key), count() from replacing_table;
|
|
|
|
OPTIMIZE TABLE replacing_table FINAL;
|
|
|
|
SELECT sum(key), count() from replacing_table;
|
|
|
|
DROP TABLE IF EXISTS replacing_table;
|