davidhewitt opened a new issue, #15387:
URL: https://github.com/apache/datafusion/issues/15387
### Describe the bug
I am testing against Datafusion main
(d68fca91fd4c73f2cd92d61d036bc0411a2ed826).
With the query below I expect there to be no `FilterExec` because the
condition is trivial `x = x`. But it is not eliminated.
### To Reproduce
```
> explain with test AS (SELECT unnest(generate_series(1, 10)) as x)
select count(*) from test WHERE x = x;
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| plan_type | plan
|
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| logical_plan | Projection: count(Int64(1)) AS count(*)
|
| | Aggregate: groupBy=[[]], aggr=[[count(Int64(1))]]
|
| | SubqueryAlias: test
|
| | Projection:
|
| | Filter:
__unnest_placeholder(generate_series(Int64(1),Int64(10)),depth=1) =
__unnest_placeholder(generate_series(Int64(1),Int64(10)),depth=1) |
| | Unnest:
lists[__unnest_placeholder(generate_series(Int64(1),Int64(10)))|depth=1]
structs[] |
| | Projection: List([1, 2, 3, 4, 5, 6, 7, 8, 9,
10]) AS __unnest_placeholder(generate_series(Int64(1),Int64(10)))
|
| | EmptyRelation
|
| physical_plan | ProjectionExec: expr=[count(Int64(1))@0 as count(*)]
|
| | AggregateExec: mode=Final, gby=[],
aggr=[count(Int64(1))]
|
| | CoalescePartitionsExec
|
| | AggregateExec: mode=Partial, gby=[],
aggr=[count(Int64(1))]
|
| | ProjectionExec: expr=[]
|
| | CoalesceBatchesExec: target_batch_size=8192
|
| | FilterExec:
__unnest_placeholder(generate_series(Int64(1),Int64(10)),depth=1)@0 =
__unnest_placeholder(generate_series(Int64(1),Int64(10)),depth=1)@0 |
| | RepartitionExec:
partitioning=RoundRobinBatch(8), input_partitions=1
|
| | UnnestExec
|
| | ProjectionExec: expr=[[1, 2, 3, 4, 5, 6,
7, 8, 9, 10] as __unnest_placeholder(generate_series(Int64(1),Int64(10)))]
|
| | PlaceholderRowExec
|
| |
|
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------+
```
### Expected behavior
_No response_
### Additional context
_No response_
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