ClickHouse/tests/queries/1_stateful/00071_merge_tree_optimize_aio.sql

DROP TABLE IF EXISTS test.hits_snippet;

CREATE TABLE test.hits_snippet(EventTime DateTime('Europe/Moscow'),  EventDate Date,  CounterID UInt32,  UserID UInt64,  URL String,  Referer String) ENGINE = MergeTree(EventDate, intHash32(UserID), (CounterID, EventDate, intHash32(UserID), EventTime), 8192);

SET min_insert_block_size_rows = 0, min_insert_block_size_bytes = 0;
SET max_block_size = 4096;

INSERT INTO test.hits_snippet(EventTime, EventDate, CounterID, UserID, URL, Referer) SELECT EventTime, EventDate, CounterID, UserID, URL, Referer FROM test.hits WHERE EventDate = toDate('2014-03-18') ORDER BY EventTime, EventDate, CounterID, UserID, URL, Referer ASC LIMIT 50;
INSERT INTO test.hits_snippet(EventTime, EventDate, CounterID, UserID, URL, Referer) SELECT EventTime, EventDate, CounterID, UserID, URL, Referer FROM test.hits WHERE EventDate = toDate('2014-03-19') ORDER BY EventTime, EventDate, CounterID, UserID, URL, Referer ASC LIMIT 50;

SET min_bytes_to_use_direct_io = 8192;

OPTIMIZE TABLE test.hits_snippet;

SELECT EventTime, EventDate, CounterID, UserID, URL, Referer FROM test.hits_snippet ORDER BY EventTime, EventDate, CounterID, UserID, URL, Referer ASC;

DROP TABLE test.hits_snippet;