ClickHouse/tests/queries/0_stateless/01410_nullable_key_and_index.sql

DROP TABLE IF EXISTS nullable_key;
DROP TABLE IF EXISTS nullable_key_without_final_mark;
DROP TABLE IF EXISTS nullable_minmax_index;

SET max_threads = 1;

CREATE TABLE nullable_key (k Nullable(int), v int) ENGINE MergeTree ORDER BY k SETTINGS allow_nullable_key = 1, index_granularity = 1;

INSERT INTO nullable_key SELECT number * 2, number * 3 FROM numbers(10);
INSERT INTO nullable_key SELECT NULL, -number FROM numbers(3);

SELECT * FROM nullable_key ORDER BY k;

SET force_primary_key = 1;
SET max_rows_to_read = 3;
SELECT * FROM nullable_key WHERE k IS NULL;
SET max_rows_to_read = 10;
SELECT * FROM nullable_key WHERE k IS NOT NULL;
SET max_rows_to_read = 5;
SELECT * FROM nullable_key WHERE k > 10;
SELECT * FROM nullable_key WHERE k < 10;

OPTIMIZE TABLE nullable_key FINAL;

SET max_rows_to_read = 4; -- one additional left mark needs to be read
SELECT * FROM nullable_key WHERE k IS NULL;
SET max_rows_to_read = 10;
SELECT * FROM nullable_key WHERE k IS NOT NULL;

-- Nullable in set and with transform_null_in = 1
SET max_rows_to_read = 3;
SELECT * FROM nullable_key WHERE k IN (10, 20) SETTINGS transform_null_in = 1;
SET max_rows_to_read = 5;
SELECT * FROM nullable_key WHERE k IN (3, NULL) SETTINGS transform_null_in = 1;

CREATE TABLE nullable_key_without_final_mark (s Nullable(String)) ENGINE MergeTree ORDER BY s SETTINGS allow_nullable_key = 1, write_final_mark = 0;
INSERT INTO nullable_key_without_final_mark VALUES ('123'), (NULL);
SET max_rows_to_read = 0;
SELECT * FROM nullable_key_without_final_mark WHERE s IS NULL;
SELECT * FROM nullable_key_without_final_mark WHERE s IS NOT NULL;

CREATE TABLE nullable_minmax_index (k int, v Nullable(int), INDEX v_minmax v TYPE minmax GRANULARITY 4) ENGINE MergeTree ORDER BY k SETTINGS index_granularity = 1;

INSERT INTO nullable_minmax_index VALUES (1, 3), (2, 7), (3, 4), (2, NULL); -- [3, +Inf]
INSERT INTO nullable_minmax_index VALUES (1, 1), (2, 2), (3, 2), (2, 1); -- [1, 2]
INSERT INTO nullable_minmax_index VALUES (2, NULL), (3, NULL); -- [+Inf, +Inf]

SET force_primary_key = 0;
SELECT * FROM nullable_minmax_index ORDER BY k;
SET max_rows_to_read = 6;
SELECT * FROM nullable_minmax_index WHERE v IS NULL;
-- NOTE: granuals with Null values cannot be filtred in data skipping indexes,
-- due to backward compatibility
SET max_rows_to_read = 0;
SELECT * FROM nullable_minmax_index WHERE v IS NOT NULL;
SET max_rows_to_read = 6;
SELECT * FROM nullable_minmax_index WHERE v > 2;
-- NOTE: granuals with Null values cannot be filtred in data skipping indexes,
-- due to backward compatibility
SET max_rows_to_read = 0;
SELECT * FROM nullable_minmax_index WHERE v <= 2;

DROP TABLE nullable_key;
DROP TABLE nullable_key_without_final_mark;
DROP TABLE nullable_minmax_index;