ClickHouse/dbms/tests/queries/0_stateless/00610_materialized_view_forward_alter_partition_statements.sql

DROP TABLE IF EXISTS tab;
DROP TABLE IF EXISTS mv;

CREATE TABLE tab(d Date, x UInt32) ENGINE MergeTree(d, x, 8192);
CREATE MATERIALIZED VIEW mv(d Date, y UInt64) ENGINE MergeTree(d, y, 8192) AS SELECT d, x + 1 AS y FROM tab;

INSERT INTO tab VALUES ('2018-01-01', 1), ('2018-01-01', 2), ('2018-02-01', 3);

SELECT '-- Before DROP PARTITION --';
SELECT * FROM mv ORDER BY y;

ALTER TABLE mv DROP PARTITION 201801;

SELECT '-- After DROP PARTITION --';
SELECT * FROM mv ORDER BY y;

DROP TABLE tab;
DROP TABLE mv;