tv42 commented on issue #8379:
URL:
https://github.com/apache/arrow-datafusion/issues/8379#issuecomment-1847906637
Related to this, SQLite and Postgres allow duplicate column names in
results. From SQLite tests:
```sql
SELECT + COUNT( * ) AS col1, - 92 - + - 47 AS col1
```
Datafusion errors out with
```
query failed: Error during planning: Projections require unique expression
names but the expression "COUNT(*) AS col1" at position 0 and "Int64(-92) -
Int64(-47) AS col1" at position 1 have the same name. Consider aliasing ("AS")
one of them.
```
Maybe after/as part of implementing this, Datafusion should relax that
restriction?
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