ClickHouse/tests/queries/0_stateless/02769_compare_functions_nan.sql

SET compile_expressions = 1;
SET min_count_to_compile_expression = 0;

SELECT nan AS value, value = value, value = materialize(value), materialize(value) = value, materialize(value) = materialize(value);
SELECT cast(nan, 'Float32') AS value, value = value, value = materialize(value), materialize(value) = value, materialize(value) = materialize(value);
SELECT nan AS lhs, cast(nan, 'Float32') AS rhs, lhs = rhs, lhs = materialize(rhs), materialize(lhs) = rhs, materialize(lhs) = materialize(rhs);

SELECT '--';

DROP TABLE IF EXISTS test_table;
CREATE TABLE test_table
(
    id UInt32,
    value UInt32
) ENGINE = MergeTree ORDER BY id;

INSERT INTO test_table VALUES (76, 57);

SELECT value FROM (SELECT stddevSamp(id) AS value FROM test_table) as subquery
WHERE ((value = value) AND (NOT (value = value)));

DROP TABLE test_table;

SELECT '--';

SELECT nan AS value, value != value, value != materialize(value), materialize(value) != value, materialize(value) != materialize(value);
SELECT cast(nan, 'Float32') AS value, value != value, value != materialize(value), materialize(value) != value, materialize(value) != materialize(value);
SELECT nan AS lhs, cast(nan, 'Float32') AS rhs, lhs != rhs, lhs != materialize(rhs), materialize(lhs) != rhs, materialize(lhs) != materialize(rhs);

SELECT '--';

CREATE TABLE test_table
(
    id UInt32,
    value_1 UInt32,
    value_2 Float32
) ENGINE = MergeTree ORDER BY id;

INSERT INTO test_table VALUES (12000, 36, 77.94);

SELECT value
FROM (SELECT (corr(value_1, value_1) OVER test_window) AS value FROM test_table WINDOW test_window AS (PARTITION BY value_2 ORDER BY id ASC)) as subquery
WHERE not (not (value <> value));

DROP TABLE test_table;

SELECT '--';

CREATE TABLE test_table
(
    id Float32,
    value Float32
) ENGINE=MergeTree ORDER BY id;

INSERT INTO test_table VALUES (-10.75, 95.57);

SELECT * FROM (SELECT corr(id, id) as corr_value FROM test_table GROUP BY value) AS subquery LEFT ANTI JOIN test_table ON (subquery.corr_value = test_table.id)
WHERE (test_table.id >= test_table.id) AND (NOT (test_table.id >= test_table.id));

DROP TABLE test_table;