greptimedb/tests/cases/standalone/optimizer/order_by.result

explain select * from numbers;

+---------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| plan_type     | plan                                                                                                                                                                                                                                 |
+---------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| logical_plan  | MergeScan [is_placeholder=false, remote_input=[                                                                                                                                                                                      |
|               | Projection: numbers.number                                                                                                                                                                                                           |
|               |   TableScan: numbers                                                                                                                                                                                                                 |
|               | ]]                                                                                                                                                                                                                                   |
| physical_plan | StreamScanAdapter: [<SendableRecordBatchStream>], schema: [Schema { fields: [Field { name: "number", data_type: UInt32, nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }], metadata: {"greptime:version": "0"} }] |
|               |                                                                                                                                                                                                                                      |
+---------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

explain select * from numbers order by number desc;

+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| plan_type     | plan                                                                                                                                                                                                                                   |
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| logical_plan  | MergeScan [is_placeholder=false, remote_input=[                                                                                                                                                                                        |
|               | Sort: numbers.number DESC NULLS FIRST                                                                                                                                                                                                  |
|               |   Projection: numbers.number                                                                                                                                                                                                           |
|               |     TableScan: numbers                                                                                                                                                                                                                 |
|               | ]]                                                                                                                                                                                                                                     |
| physical_plan | SortExec: expr=[number@0 DESC], preserve_partitioning=[false]                                                                                                                                                                          |
|               |   StreamScanAdapter: [<SendableRecordBatchStream>], schema: [Schema { fields: [Field { name: "number", data_type: UInt32, nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }], metadata: {"greptime:version": "0"} }] |
|               |                                                                                                                                                                                                                                        |
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

explain select * from numbers order by number asc;

+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| plan_type     | plan                                                                                                                                                                                                                                   |
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| logical_plan  | MergeScan [is_placeholder=false, remote_input=[                                                                                                                                                                                        |
|               | Sort: numbers.number ASC NULLS LAST                                                                                                                                                                                                    |
|               |   Projection: numbers.number                                                                                                                                                                                                           |
|               |     TableScan: numbers                                                                                                                                                                                                                 |
|               | ]]                                                                                                                                                                                                                                     |
| physical_plan | SortExec: expr=[number@0 ASC NULLS LAST], preserve_partitioning=[false]                                                                                                                                                                |
|               |   StreamScanAdapter: [<SendableRecordBatchStream>], schema: [Schema { fields: [Field { name: "number", data_type: UInt32, nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }], metadata: {"greptime:version": "0"} }] |
|               |                                                                                                                                                                                                                                        |
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

explain select * from numbers order by number desc limit 10;

+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| plan_type     | plan                                                                                                                                                                                                                                   |
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| logical_plan  | MergeScan [is_placeholder=false, remote_input=[                                                                                                                                                                                        |
|               | Limit: skip=0, fetch=10                                                                                                                                                                                                                |
|               |   Sort: numbers.number DESC NULLS FIRST                                                                                                                                                                                                |
|               |     Projection: numbers.number                                                                                                                                                                                                         |
|               |       TableScan: numbers                                                                                                                                                                                                               |
|               | ]]                                                                                                                                                                                                                                     |
| physical_plan | SortExec: TopK(fetch=10), expr=[number@0 DESC], preserve_partitioning=[false]                                                                                                                                                          |
|               |   StreamScanAdapter: [<SendableRecordBatchStream>], schema: [Schema { fields: [Field { name: "number", data_type: UInt32, nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }], metadata: {"greptime:version": "0"} }] |
|               |                                                                                                                                                                                                                                        |
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

explain select * from numbers order by number asc limit 10;

+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| plan_type     | plan                                                                                                                                                                                                                                   |
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| logical_plan  | MergeScan [is_placeholder=false, remote_input=[                                                                                                                                                                                        |
|               | Limit: skip=0, fetch=10                                                                                                                                                                                                                |
|               |   Sort: numbers.number ASC NULLS LAST                                                                                                                                                                                                  |
|               |     Projection: numbers.number                                                                                                                                                                                                         |
|               |       TableScan: numbers                                                                                                                                                                                                               |
|               | ]]                                                                                                                                                                                                                                     |
| physical_plan | SortExec: TopK(fetch=10), expr=[number@0 ASC NULLS LAST], preserve_partitioning=[false]                                                                                                                                                |
|               |   StreamScanAdapter: [<SendableRecordBatchStream>], schema: [Schema { fields: [Field { name: "number", data_type: UInt32, nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }], metadata: {"greptime:version": "0"} }] |
|               |                                                                                                                                                                                                                                        |
+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

CREATE TABLE test_pk(pk INTEGER PRIMARY KEY, i INTEGER, t TIMESTAMP TIME INDEX) WITH('compaction.type'='twcs');

Affected Rows: 0

INSERT INTO test_pk VALUES (1, 1, 1), (2, NULL, 2), (3, 1, 3), (4, 2, 4), (5, 2, 5), (6, NULL, 6);

Affected Rows: 6

-- Test aliasing.
SELECT i, t AS alias_ts FROM test_pk ORDER BY t DESC LIMIT 5;

+---+-------------------------+
| i | alias_ts                |
+---+-------------------------+
|   | 1970-01-01T00:00:00.006 |
| 2 | 1970-01-01T00:00:00.005 |
| 2 | 1970-01-01T00:00:00.004 |
| 1 | 1970-01-01T00:00:00.003 |
|   | 1970-01-01T00:00:00.002 |
+---+-------------------------+

-- Test aliasing.
SELECT i, t AS alias_ts FROM test_pk ORDER BY alias_ts DESC LIMIT 5;

+---+-------------------------+
| i | alias_ts                |
+---+-------------------------+
|   | 1970-01-01T00:00:00.006 |
| 2 | 1970-01-01T00:00:00.005 |
| 2 | 1970-01-01T00:00:00.004 |
| 1 | 1970-01-01T00:00:00.003 |
|   | 1970-01-01T00:00:00.002 |
+---+-------------------------+

-- SQLNESS REPLACE (-+) -
-- SQLNESS REPLACE (\s\s+) _
-- SQLNESS REPLACE (peers.*) REDACTED
-- SQLNESS REPLACE (metrics.*) REDACTED
-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
-- SQLNESS REPLACE num_ranges=\d+ num_ranges=REDACTED
EXPLAIN ANALYZE SELECT i, t AS alias_ts FROM test_pk ORDER BY t DESC LIMIT 5;

+-+-+-+
| stage | node | plan_|
+-+-+-+
| 0_| 0_|_MergeScanExec: REDACTED
|_|_|_|
| 1_| 0_|_ProjectionExec: expr=[i@0 as i, alias_ts@1 as alias_ts] REDACTED
|_|_|_SortPreservingMergeExec: [t@2 DESC], fetch=5 REDACTED
|_|_|_WindowedSortExec: expr=t@2 DESC num_ranges=REDACTED fetch=5 REDACTED
|_|_|_PartSortExec: expr=t@2 DESC num_ranges=REDACTED limit=5 REDACTED
|_|_|_ProjectionExec: expr=[i@0 as i, t@1 as alias_ts, t@1 as t] REDACTED
|_|_|_SeqScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0} REDACTED
|_|_|_|
|_|_| Total rows: 5_|
+-+-+-+

-- SQLNESS REPLACE (-+) -
-- SQLNESS REPLACE (\s\s+) _
-- SQLNESS REPLACE (peers.*) REDACTED
-- SQLNESS REPLACE (metrics.*) REDACTED
-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
-- SQLNESS REPLACE num_ranges=\d+ num_ranges=REDACTED
EXPLAIN ANALYZE SELECT i, t AS alias_ts FROM test_pk ORDER BY alias_ts DESC LIMIT 5;

+-+-+-+
| stage | node | plan_|
+-+-+-+
| 0_| 0_|_MergeScanExec: REDACTED
|_|_|_|
| 1_| 0_|_SortPreservingMergeExec: [alias_ts@1 DESC], fetch=5 REDACTED
|_|_|_WindowedSortExec: expr=alias_ts@1 DESC num_ranges=REDACTED fetch=5 REDACTED
|_|_|_PartSortExec: expr=alias_ts@1 DESC num_ranges=REDACTED limit=5 REDACTED
|_|_|_ProjectionExec: expr=[i@0 as i, t@1 as alias_ts] REDACTED
|_|_|_SeqScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0} REDACTED
|_|_|_|
|_|_| Total rows: 5_|
+-+-+-+

DROP TABLE test_pk;

Affected Rows: 0