mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-30 19:42:00 +00:00
66 lines
1.4 KiB
PL/PgSQL
66 lines
1.4 KiB
PL/PgSQL
SET join_algorithm = 'full_sorting_merge';
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SET allow_experimental_analyzer = 1;
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DROP TABLE IF EXISTS events0;
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CREATE TABLE events0 (
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begin Float64,
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value Int32
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) ENGINE = MergeTree ORDER BY begin;
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INSERT INTO events0 VALUES (1.0, 0), (3.0, 1), (6.0, 2), (8.0, 3);
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SELECT p.ts, e.value
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FROM
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(SELECT number :: Float64 AS ts FROM numbers(10)) p
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ASOF JOIN events0 e
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ON p.ts >= e.begin
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ORDER BY p.ts ASC;
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SELECT p.ts, e.value
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FROM
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(SELECT number :: Float64 AS ts FROM numbers(10)) p
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ASOF LEFT JOIN events0 e
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ON p.ts >= e.begin
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ORDER BY p.ts ASC
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-- SETTINGS join_use_nulls = 1
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;
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DROP TABLE IF EXISTS events0;
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DROP TABLE IF EXISTS events;
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DROP TABLE IF EXISTS probes;
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CREATE TABLE events (
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key Int32,
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begin Float64,
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value Int32
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) ENGINE = MergeTree ORDER BY (key, begin);
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INSERT INTO events VALUES (1, 1.0, 0), (1, 3.0, 1), (1, 6.0, 2), (1, 8.0, 3), (2, 0.0, 10), (2, 7.0, 20), (2, 11.0, 30);
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CREATE TABLE probes (
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key Int32,
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ts Float64
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) ENGINE = MergeTree ORDER BY (key, ts) AS
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SELECT
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key.number,
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ts.number
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FROM
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numbers(1, 2) as key,
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numbers(10) as ts
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SETTINGS join_algorithm = 'hash';
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SELECT p.key, p.ts, e.value
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FROM probes p
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ASOF JOIN events e
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ON p.key = e.key AND p.ts >= e.begin
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ORDER BY p.key, p.ts ASC;
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SELECT p.key, p.ts, e.value
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FROM probes p
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ASOF LEFT JOIN events e
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ON p.key = e.key AND p.ts >= e.begin
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ORDER BY p.key, p.ts ASC NULLS FIRST;
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