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12 lines
472 B
SQL
12 lines
472 B
SQL
DROP TABLE IF EXISTS t_sample_factor;
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CREATE TABLE t_sample_factor(a UInt64, b UInt64) ENGINE = MergeTree ORDER BY (a, b) SAMPLE BY b;
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INSERT INTO t_sample_factor(a, b) VALUES (1, 2), (3, 4);
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SELECT uniq(b) * any(_sample_factor) FROM t_sample_factor SAMPLE 200000;
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SELECT uniq(b) * any(_sample_factor) FROM t_sample_factor SAMPLE 200000 WHERE a < -1;
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SELECT uniq(b) * any(_sample_factor) FROM t_sample_factor SAMPLE 200000 PREWHERE a < -1;
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DROP TABLE t_sample_factor;
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