mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-18 22:40:50 +00:00
12 lines
820 B
SQL
12 lines
820 B
SQL
SET send_logs_level = 'none';
|
|
SET allow_suspicious_codecs = 1;
|
|
|
|
DROP TABLE IF EXISTS delta_codec_for_alter;
|
|
CREATE TABLE delta_codec_for_alter (date Date, x UInt32 Codec(Delta), s FixedString(128)) ENGINE = MergeTree ORDER BY tuple();
|
|
SELECT compression_codec FROM system.columns WHERE database = currentDatabase() AND table = 'delta_codec_for_alter' AND name = 'x';
|
|
ALTER TABLE delta_codec_for_alter MODIFY COLUMN x Codec(Delta, LZ4);
|
|
SELECT compression_codec FROM system.columns WHERE database = currentDatabase() AND table = 'delta_codec_for_alter' AND name = 'x';
|
|
ALTER TABLE delta_codec_for_alter MODIFY COLUMN x UInt64 Codec(Delta, LZ4);
|
|
SELECT compression_codec FROM system.columns WHERE database = currentDatabase() AND table = 'delta_codec_for_alter' AND name = 'x';
|
|
DROP TABLE IF EXISTS delta_codec_for_alter;
|