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-- test if handle aliased sort expr correctly
CREATE TABLE IF NOT EXISTS lightning (
collect_time TIMESTAMP(9) NOT NULL,
collect_time_utc TIMESTAMP(9) NULL,
peak_current FLOAT NULL,
TIME INDEX (collect_time)
)
ENGINE=mito
WITH(
'compaction.twcs.time_window' = '7d',
'compaction.type' = 'twcs'
);
Affected Rows: 0
-- insert some data, with collect_time = collect_time_utc + 8 hour
INSERT INTO lightning VALUES
('2025-03-01 16:00:00', '2025-03-01 08:00:00', 1.0),
('2025-03-01 17:00:00', '2025-03-01 09:00:00', 1.0),
('2025-03-01 18:00:00', '2025-03-01 10:00:00', 1.0),
('2025-03-01 19:00:00', '2025-03-01 11:00:00', 1.0),
('2025-03-01 20:00:00', '2025-03-01 12:00:00', 1.0),
('2025-03-01 21:00:00', '2025-03-01 13:00:00', 1.0),
('2025-03-01 22:00:00', '2025-03-01 14:00:00', 1.0),
('2025-03-01 23:00:00', '2025-03-01 15:00:00', 1.0)
;
Affected Rows: 8
-- notice the alias make order by not applicable for window sort
-- note due to alias there is a tiny difference in the output between standalone/distributed
-- which is acceptable
SELECT
collect_time_utc AS collect_time,
peak_current,
FROM
lightning
ORDER BY
collect_time ASC;
+---------------------+--------------+
| collect_time | peak_current |
+---------------------+--------------+
| 2025-03-01T08:00:00 | 1.0 |
| 2025-03-01T09:00:00 | 1.0 |
| 2025-03-01T10:00:00 | 1.0 |
| 2025-03-01T11:00:00 | 1.0 |
| 2025-03-01T12:00:00 | 1.0 |
| 2025-03-01T13:00:00 | 1.0 |
| 2025-03-01T14:00:00 | 1.0 |
| 2025-03-01T15:00:00 | 1.0 |
+---------------------+--------------+
-- SQLNESS REPLACE (-+) -
-- SQLNESS REPLACE (\s\s+) _
-- SQLNESS REPLACE (peers.*) REDACTED
-- SQLNESS REPLACE (metrics.*) REDACTED
-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
EXPLAIN ANALYZE SELECT
collect_time_utc AS collect_time,
peak_current,
FROM
lightning
ORDER BY
collect_time ASC;
+-+-+-+
| stage | node | plan_|
+-+-+-+
| 0_| 0_|_MergeScanExec: REDACTED
|_|_|_|
| 1_| 0_|_ProjectionExec: expr=[collect_time_utc@0 as collect_time, peak_current@1 as peak_current] REDACTED
|_|_|_SortExec: expr=[collect_time_utc@0 ASC NULLS LAST], preserve_partitioning=[false] REDACTED
|_|_|_SeqScan: region=REDACTED, partition_count=1 (1 memtable ranges, 0 file 0 ranges) REDACTED
|_|_|_|
|_|_| Total rows: 8_|
+-+-+-+
-- also try alias with different name with time index
SELECT
collect_time_utc AS collect_time_0,
peak_current,
FROM
lightning
ORDER BY
collect_time_0 ASC;
+---------------------+--------------+
| collect_time_0 | peak_current |
+---------------------+--------------+
| 2025-03-01T08:00:00 | 1.0 |
| 2025-03-01T09:00:00 | 1.0 |
| 2025-03-01T10:00:00 | 1.0 |
| 2025-03-01T11:00:00 | 1.0 |
| 2025-03-01T12:00:00 | 1.0 |
| 2025-03-01T13:00:00 | 1.0 |
| 2025-03-01T14:00:00 | 1.0 |
| 2025-03-01T15:00:00 | 1.0 |
+---------------------+--------------+
-- SQLNESS REPLACE (-+) -
-- SQLNESS REPLACE (\s\s+) _
-- SQLNESS REPLACE (peers.*) REDACTED
-- SQLNESS REPLACE (metrics.*) REDACTED
-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
EXPLAIN ANALYZE SELECT
collect_time_utc AS collect_time_0,
peak_current,
FROM
lightning
ORDER BY
collect_time_0 ASC;
+-+-+-+
| stage | node | plan_|
+-+-+-+
| 0_| 0_|_MergeScanExec: REDACTED
|_|_|_|
| 1_| 0_|_ProjectionExec: expr=[collect_time_utc@0 as collect_time_0, peak_current@1 as peak_current] REDACTED
|_|_|_SortExec: expr=[collect_time_utc@0 ASC NULLS LAST], preserve_partitioning=[false] REDACTED
|_|_|_SeqScan: region=REDACTED, partition_count=1 (1 memtable ranges, 0 file 0 ranges) REDACTED
|_|_|_|
|_|_| Total rows: 8_|
+-+-+-+
-- try more complex alias with time index
SELECT
collect_time AS true_collect_time,
collect_time_utc AS collect_time,
peak_current,
FROM
lightning
ORDER BY
true_collect_time DESC;
+---------------------+---------------------+--------------+
| true_collect_time | collect_time | peak_current |
+---------------------+---------------------+--------------+
| 2025-03-01T23:00:00 | 2025-03-01T15:00:00 | 1.0 |
| 2025-03-01T22:00:00 | 2025-03-01T14:00:00 | 1.0 |
| 2025-03-01T21:00:00 | 2025-03-01T13:00:00 | 1.0 |
| 2025-03-01T20:00:00 | 2025-03-01T12:00:00 | 1.0 |
| 2025-03-01T19:00:00 | 2025-03-01T11:00:00 | 1.0 |
| 2025-03-01T18:00:00 | 2025-03-01T10:00:00 | 1.0 |
| 2025-03-01T17:00:00 | 2025-03-01T09:00:00 | 1.0 |
| 2025-03-01T16:00:00 | 2025-03-01T08:00:00 | 1.0 |
+---------------------+---------------------+--------------+
-- SQLNESS REPLACE (-+) -
-- SQLNESS REPLACE (\s\s+) _
-- SQLNESS REPLACE (peers.*) REDACTED
-- SQLNESS REPLACE (metrics.*) REDACTED
-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
EXPLAIN ANALYZE SELECT
collect_time AS true_collect_time,
collect_time_utc AS collect_time,
peak_current,
FROM
lightning
ORDER BY
true_collect_time DESC;
+-+-+-+
| stage | node | plan_|
+-+-+-+
| 0_| 0_|_MergeScanExec: REDACTED
|_|_|_|
| 1_| 0_|_ProjectionExec: expr=[collect_time@0 as true_collect_time, collect_time_utc@1 as collect_time, peak_current@2 as peak_current] REDACTED
|_|_|_SortPreservingMergeExec: [collect_time@0 DESC] REDACTED
|_|_|_WindowedSortExec: expr=collect_time@0 DESC num_ranges=1 REDACTED
|_|_|_PartSortExec: expr=collect_time@0 DESC num_ranges=1 REDACTED
|_|_|_SeqScan: region=REDACTED, partition_count=1 (1 memtable ranges, 0 file 0 ranges) REDACTED
|_|_|_|
|_|_| Total rows: 8_|
+-+-+-+
-- this should also do windowed sort
SELECT
collect_time_utc AS collect_time,
collect_time AS true_collect_time,
peak_current,
FROM
lightning
ORDER BY
true_collect_time DESC;
+---------------------+---------------------+--------------+
| collect_time | true_collect_time | peak_current |
+---------------------+---------------------+--------------+
| 2025-03-01T15:00:00 | 2025-03-01T23:00:00 | 1.0 |
| 2025-03-01T14:00:00 | 2025-03-01T22:00:00 | 1.0 |
| 2025-03-01T13:00:00 | 2025-03-01T21:00:00 | 1.0 |
| 2025-03-01T12:00:00 | 2025-03-01T20:00:00 | 1.0 |
| 2025-03-01T11:00:00 | 2025-03-01T19:00:00 | 1.0 |
| 2025-03-01T10:00:00 | 2025-03-01T18:00:00 | 1.0 |
| 2025-03-01T09:00:00 | 2025-03-01T17:00:00 | 1.0 |
| 2025-03-01T08:00:00 | 2025-03-01T16:00:00 | 1.0 |
+---------------------+---------------------+--------------+
-- SQLNESS REPLACE (-+) -
-- SQLNESS REPLACE (\s\s+) _
-- SQLNESS REPLACE (peers.*) REDACTED
-- SQLNESS REPLACE (metrics.*) REDACTED
-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
EXPLAIN ANALYZE SELECT
collect_time_utc AS collect_time,
collect_time AS true_collect_time,
peak_current,
FROM
lightning
ORDER BY
true_collect_time DESC;
+-+-+-+
| stage | node | plan_|
+-+-+-+
| 0_| 0_|_MergeScanExec: REDACTED
|_|_|_|
| 1_| 0_|_ProjectionExec: expr=[collect_time_utc@0 as collect_time, collect_time@1 as true_collect_time, peak_current@2 as peak_current] REDACTED
|_|_|_SortPreservingMergeExec: [collect_time@1 DESC] REDACTED
|_|_|_WindowedSortExec: expr=collect_time@1 DESC num_ranges=1 REDACTED
|_|_|_PartSortExec: expr=collect_time@1 DESC num_ranges=1 REDACTED
|_|_|_ProjectionExec: expr=[collect_time_utc@1 as collect_time_utc, collect_time@0 as collect_time, peak_current@2 as peak_current] REDACTED
|_|_|_SeqScan: region=REDACTED, partition_count=1 (1 memtable ranges, 0 file 0 ranges) REDACTED
|_|_|_|
|_|_| Total rows: 8_|
+-+-+-+
DROP TABLE lightning;
Affected Rows: 0