ClickHouse/tests/queries/0_stateless/02792_drop_projection_lwd.sql

SET mutations_sync = 2;

DROP TABLE IF EXISTS t_projections_lwd;

CREATE TABLE t_projections_lwd (a UInt32, b UInt32, PROJECTION p (SELECT * ORDER BY b)) ENGINE = MergeTree ORDER BY a;

INSERT INTO t_projections_lwd SELECT number, number FROM numbers(100);

-- LWD does not work, as expected
DELETE FROM t_projections_lwd WHERE a = 1; -- { serverError SUPPORT_IS_DISABLED }
KILL MUTATION WHERE database = currentDatabase() AND table = 't_projections_lwd' SYNC FORMAT Null;

-- drop projection
ALTER TABLE t_projections_lwd DROP projection p;

DELETE FROM t_projections_lwd WHERE a = 2;

SELECT count() FROM t_projections_lwd;

DROP TABLE t_projections_lwd;