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91820a8006
* fix: empty by in range query * Apply suggestions from code review --------- Co-authored-by: Ruihang Xia <waynestxia@gmail.com>
61 lines
1.7 KiB
SQL
61 lines
1.7 KiB
SQL
CREATE TABLE host (
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ts timestamp(3) time index,
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host STRING PRIMARY KEY,
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val BIGINT,
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);
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INSERT INTO TABLE host VALUES
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(0, 'host1', 0),
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(5000, 'host1', null),
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(10000, 'host1', 1),
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(15000, 'host1', null),
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(20000, 'host1', 2),
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(0, 'host2', 3),
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(5000, 'host2', null),
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(10000, 'host2', 4),
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(15000, 'host2', null),
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(20000, 'host2', 5);
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-- Test by calculate
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SELECT ts, length(host), max(val) RANGE '5s' FROM host ALIGN '20s' BY (length(host)) ORDER BY ts;
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SELECT ts, max(val) RANGE '5s' FROM host ALIGN '20s' BY (2) ORDER BY ts;
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-- The user explicitly specifies that the aggregation key is empty. In this case, there is no aggregation key. All data will be aggregated into a group.
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-- Implement by rewrite `BY()` to `BY(1)` automatically through sqlparser. They are semantically equivalent.
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SELECT ts, max(val) RANGE '5s' FROM host ALIGN '20s' BY () ORDER BY ts;
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SELECT ts, CAST(length(host) as INT64) + 2, max(val) RANGE '5s' FROM host ALIGN '20s' BY (CAST(length(host) as INT64) + 2) ORDER BY ts;
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-- Test error
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-- project non-aggregation key
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SELECT ts, host, max(val) RANGE '5s' FROM host ALIGN '20s' BY () ORDER BY ts;
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DROP TABLE host;
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-- Test no primary key and by keyword
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CREATE TABLE host (
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ts timestamp(3) time index,
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host STRING,
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val BIGINT,
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);
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INSERT INTO TABLE host VALUES
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(0, 'host1', 0),
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(5000, 'host1', null),
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(10000, 'host1', 1),
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(15000, 'host1', null),
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(20000, 'host1', 2),
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(0, 'host2', 3),
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(5000, 'host2', null),
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(10000, 'host2', 4),
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(15000, 'host2', null),
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(20000, 'host2', 5);
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SELECT ts, max(val) RANGE '5s' FROM host ALIGN '20s' ORDER BY ts;
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DROP TABLE host;
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