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19 lines
583 B
SQL
19 lines
583 B
SQL
DROP TABLE IF EXISTS m3;
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DROP TABLE IF EXISTS m1;
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DROP TABLE IF EXISTS x;
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CREATE TABLE x (d Date, t DateTime) ENGINE = MergeTree(d, (d, t), 1);
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CREATE MATERIALIZED VIEW m1 (d Date, t DateTime, c UInt64) ENGINE = SummingMergeTree(d, (d, t), 1) AS SELECT d, toStartOfMinute(x.t) as t, count() as c FROM x GROUP BY d, t;
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CREATE MATERIALIZED VIEW m3 ENGINE = SummingMergeTree(d, (d, t), 1) AS SELECT d, toStartOfHour(m1.t) as t, c FROM m1;
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INSERT INTO x VALUES (today(), now());
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INSERT INTO x VALUES (today(), now());
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OPTIMIZE TABLE m3;
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DROP TABLE m3;
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DROP TABLE m1;
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DROP TABLE x;
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