etseidl opened a new issue, #15815:
URL: https://github.com/apache/datafusion/issues/15815
### Describe the bug
Performing a query where a `Float16` column is compared to an integer
literal results in the `Float16` being cast to `Int64`.
```sql
> explain format indent select * from
'parquet-testing/data/float16_nonzeros_and_nans.parquet' where x > 2;
+---------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| plan_type | plan
|
+---------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| logical_plan | Filter:
CAST(parquet-testing/data/float16_nonzeros_and_nans.parquet.x AS Int64) >
Int64(2)
|
| | TableScan:
parquet-testing/data/float16_nonzeros_and_nans.parquet projection=[x],
partial_filters=[CAST(parquet-testing/data/float16_nonzeros_and_nans.parquet.x
AS Int64) > Int64(2)] |
| physical_plan | CoalesceBatchesExec: target_batch_size=8192
|
| | FilterExec: CAST(x@0 AS Int64) > 2
|
| | RepartitionExec: partitioning=RoundRobinBatch(8),
input_partitions=1
|
| | DataSourceExec: file_groups={1 group:
[[Users/seidl/src/datafusion/parquet-testing/data/float16_nonzeros_and_nans.parquet]]},
projection=[x], file_type=parquet, predicate=CAST(x@0 AS Int64) > 2 |
| |
|
+---------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
```
### To Reproduce
```
./target/debug/datafusion-cli -c "explain format indent select * from
'parquet-testing/data/float16_nonzeros_and_nans.parquet' where x > 2;"
```
### Expected behavior
This should instead cast `2` to `Float16`.
```
+---------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| plan_type | plan
|
+---------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| logical_plan | Filter:
parquet-testing/data/float16_nonzeros_and_nans.parquet.x > Float16(2)
|
| | TableScan:
parquet-testing/data/float16_nonzeros_and_nans.parquet projection=[x],
partial_filters=[parquet-testing/data/float16_nonzeros_and_nans.parquet.x >
Float16(2)]
|
| physical_plan | CoalesceBatchesExec: target_batch_size=8192
|
| | FilterExec: x@0 > 2
|
| | RepartitionExec: partitioning=RoundRobinBatch(8),
input_partitions=1
|
| | DataSourceExec: file_groups={1 group:
[[Users/seidl/src/datafusion/parquet-testing/data/float16_nonzeros_and_nans.parquet]]},
projection=[x], file_type=parquet, predicate=x@0 > 2,
pruning_predicate=x_null_count@1 != row_count@2 AND x_max@0 > 2,
required_guarantees=[] |
| |
|
+---------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
```
### Additional context
_No response_
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