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Merge pull request #41175 from ClickHouse/tautological_if_index

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Add a test for #4242
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Alexey Milovidov 2022-09-10 18:07:04 +03:00 committed by GitHub
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tests/queries/0_stateless/02418_tautological_if_index.reference Normal file
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tests/queries/0_stateless/02418_tautological_if_index.sql Normal file
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DROP TABLE IF EXISTS constCondOptimization;
CREATE TABLE constCondOptimization
(
d Date DEFAULT today(),
time DateTime DEFAULT now(),
n Int64
)
ENGINE = MergeTree ORDER BY (time, n) SETTINGS index_granularity = 1;
INSERT INTO constCondOptimization (n) SELECT number FROM system.numbers LIMIT 10000;
-- The queries should use index.
SET max_rows_to_read = 2;
SELECT count() FROM constCondOptimization WHERE if(0, 1, n = 1000);
SELECT count() FROM constCondOptimization WHERE if(0, 1, n = 1000) AND 1 = 1;
DROP TABLE constCondOptimization;