Dandandan commented on issue #15177:
URL: https://github.com/apache/datafusion/issues/15177#issuecomment-2740754487
Ah actually, the query given by @xudong963 is slightly off, I think it
should be the following (without the explicit join):
```
> EXPLAIN (WITH ids AS (SELECT row_id, a FROM t ORDER BY a LIMIT 10)
SELECT t.* FROM t WHERE t.row_id IN (SELECT row_id FROM ids));
+---------------+------------------------------------------------------------------------------------------+
| plan_type | plan
|
+---------------+------------------------------------------------------------------------------------------+
| logical_plan | LeftSemi Join: t.row_id = __correlated_sq_1.row_id
|
| | TableScan: t projection=[a, b, row_id]
|
| | SubqueryAlias: __correlated_sq_1
|
| | SubqueryAlias: ids
|
| | Projection: t.row_id
|
| | Sort: t.a ASC NULLS LAST, fetch=10
|
| | Projection: t.row_id, t.a
|
| | TableScan: t projection=[a, row_id]
|
| physical_plan | CoalesceBatchesExec: target_batch_size=8192
|
| | HashJoinExec: mode=Partitioned, join_type=LeftSemi,
on=[(row_id@2, row_id@0)] |
| | DataSourceExec: partitions=1, partition_sizes=[0]
|
| | ProjectionExec: expr=[row_id@0 as row_id]
|
| | SortExec: TopK(fetch=10), expr=[a@1 ASC NULLS LAST],
preserve_partitioning=[false] |
| | DataSourceExec: partitions=1, partition_sizes=[0]
|
| |
|
+---------------+------------------------------------------------------------------------------------------+
2 row(s) fetched.
Elapsed 0.004 seconds.
```
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