ClickHouse/tests/queries/0_stateless/02675_sparse_columns_clear_column.sql
2023-03-08 17:19:04 +00:00

35 lines
1.1 KiB
SQL

DROP TABLE IF EXISTS t_sparse_columns_clear;
CREATE TABLE t_sparse_columns_clear (arr Array(UInt64), v UInt64)
ENGINE = MergeTree ORDER BY tuple()
SETTINGS
ratio_of_defaults_for_sparse_serialization = 0.9,
min_bytes_for_wide_part=0;
INSERT INTO t_sparse_columns_clear SELECT [number], 0 FROM numbers(1000);
SELECT column, serialization_kind FROM system.parts_columns
WHERE database = currentDatabase() AND table = 't_sparse_columns_clear' AND active
ORDER BY column;
SET mutations_sync = 2;
SET alter_sync = 2;
ALTER TABLE t_sparse_columns_clear CLEAR COLUMN v;
SELECT column, serialization_kind FROM system.parts_columns
WHERE database = currentDatabase() AND table = 't_sparse_columns_clear' AND active
ORDER BY column;
OPTIMIZE TABLE t_sparse_columns_clear FINAL;
SELECT column, serialization_kind FROM system.parts_columns
WHERE database = currentDatabase() AND table = 't_sparse_columns_clear' AND active
ORDER BY column;
DROP TABLE t_sparse_columns_clear SYNC;
SYSTEM FLUSH LOGS;
SELECT count(), groupArray(message) FROM system.text_log WHERE logger_name LIKE '%' || currentDatabase() || '.t_sparse_columns_clear' || '%' AND level = 'Error';