alamb opened a new issue #497:
URL: https://github.com/apache/arrow-datafusion/issues/497
**Describe the bug**
`explain verbose` does not appear to show the output of each optimizer pass,
nor does it seem to show pushed down predicates in the physical plan
**To Reproduce**
```shell
echo "true" > /tmp/foo.csv
cargo run -p datafusion-cli --no-default-features
```
Then run this SQL:
```sql
CREATE EXTERNAL TABLE foo(bar boolean)
STORED AS CSV
LOCATION '/tmp/foo.csv';
0 rows in set. Query took 0 seconds.
```
```sql
> explain verbose select * from foo where bar = true;
+-----------------------------------------+--------------------------------------------------------------------------+
| plan_type | plan
|
+-----------------------------------------+--------------------------------------------------------------------------+
| logical_plan | Projection: #bar
|
| | Filter: #bar Eq Boolean(true)
|
| | TableScan: foo
projection=None |
| logical_plan after projection_push_down | Projection: #bar
|
| | Filter: #bar Eq Boolean(true)
|
| | TableScan: foo
projection=Some([0]) |
| logical_plan after projection_push_down | Projection: #bar
|
| | Filter: #bar Eq Boolean(true)
|
| | TableScan: foo
projection=Some([0]) |
| physical_plan | ProjectionExec: expr=[bar]
|
| | FilterExec: bar = true
|
| | CsvExec:
source=Path(/tmp/foo.csv: [/tmp/foo.csv]), has_header=false |
+-----------------------------------------+--------------------------------------------------------------------------+
```
**Expected behavior**
I expect to see plans after filter pushdown and constant folding. Instead I
see two entries for `logical_plan after projection_push_down` which does not
seem right
**Additional context**
Add any other context about the problem here.
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