-- https://github.com/ClickHouse/ClickHouse/issues/65548
DROP TABLE IF EXISTS test_projection_deduplicate;

CREATE TABLE test_projection_deduplicate
(
    `id` Int32,
    `string` String,
    PROJECTION test_projection
    (
        SELECT id
        GROUP BY id
    )
)
ENGINE = MergeTree
PRIMARY KEY id;

INSERT INTO test_projection_deduplicate VALUES (1, 'one');
INSERT INTO test_projection_deduplicate VALUES (1, 'one');

OPTIMIZE TABLE test_projection_deduplicate DEDUPLICATE; -- { serverError SUPPORT_IS_DISABLED }

SELECT * FROM test_projection_deduplicate;

ALTER TABLE test_projection_deduplicate DROP PROJECTION test_projection;

OPTIMIZE TABLE test_projection_deduplicate DEDUPLICATE;

SELECT * FROM test_projection_deduplicate;

DROP TABLE test_projection_deduplicate;