ClickHouse/dbms/tests/queries/1_stateful/00054_merge_tree_partitions.sql

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DROP TABLE IF EXISTS test.partitions;
CREATE TABLE test.partitions (EventDate Date, CounterID UInt32) ENGINE = MergeTree(EventDate, CounterID, 8192);
INSERT INTO test.partitions SELECT EventDate + UserID % 365 AS EventDate, CounterID FROM test.hits WHERE CounterID = 731962;
SELECT count() FROM test.partitions;
SELECT count() FROM test.partitions WHERE EventDate >= toDate('2015-01-01') AND EventDate < toDate('2015-02-01');
SELECT count() FROM test.partitions WHERE EventDate < toDate('2015-01-01') OR EventDate >= toDate('2015-02-01');
ALTER TABLE test.partitions DETACH PARTITION 201501;
SELECT count() FROM test.partitions;
SELECT count() FROM test.partitions WHERE EventDate >= toDate('2015-01-01') AND EventDate < toDate('2015-02-01');
SELECT count() FROM test.partitions WHERE EventDate < toDate('2015-01-01') OR EventDate >= toDate('2015-02-01');
ALTER TABLE test.partitions ATTACH PARTITION 201501;
SELECT count() FROM test.partitions;
SELECT count() FROM test.partitions WHERE EventDate >= toDate('2015-01-01') AND EventDate < toDate('2015-02-01');
SELECT count() FROM test.partitions WHERE EventDate < toDate('2015-01-01') OR EventDate >= toDate('2015-02-01');
ALTER TABLE test.partitions DETACH PARTITION 201403;
SELECT count() FROM test.partitions;
INSERT INTO test.partitions SELECT EventDate + UserID % 365 AS EventDate, CounterID FROM test.hits WHERE CounterID = 731962 AND toStartOfMonth(EventDate) = toDate('2014-03-01');
SELECT count() FROM test.partitions;
ALTER TABLE test.partitions ATTACH PARTITION 201403;
SELECT count() FROM test.partitions;
DROP TABLE test.partitions;