CREATE TABLE table_03002 (ts DateTime, event_type String) ENGINE = MergeTree ORDER BY (event_type, ts);

CREATE MATERIALIZED VIEW mv_03002 TO table_03002 AS SELECT ts FROM table_03002;

SHOW CREATE TABLE mv_03002;

ALTER TABLE mv_03002 MODIFY QUERY
WITH MY_CTE AS (SELECT ts FROM table_03002)
SELECT * FROM MY_CTE;

SHOW CREATE TABLE mv_03002;

DROP TABLE mv_03002;
DROP TABLE table_03002;