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20 lines
555 B
MySQL
20 lines
555 B
MySQL
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DROP TABLE IF EXISTS constCondOptimization;
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CREATE TABLE constCondOptimization
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(
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d Date DEFAULT today(),
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time DateTime DEFAULT now(),
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n Int64
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)
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ENGINE = MergeTree ORDER BY (time, n) SETTINGS index_granularity = 1;
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INSERT INTO constCondOptimization (n) SELECT number FROM system.numbers LIMIT 10000;
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-- The queries should use index.
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SET max_rows_to_read = 2;
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SELECT count() FROM constCondOptimization WHERE if(0, 1, n = 1000);
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SELECT count() FROM constCondOptimization WHERE if(0, 1, n = 1000) AND 1 = 1;
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DROP TABLE constCondOptimization;
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