andygrove opened a new issue, #3326:
URL: https://github.com/apache/arrow-datafusion/issues/3326
**Is your feature request related to a problem or challenge? Please describe
what you are trying to do.**
DataFusion differs from Spark and Postgres in the naming of CAST
expressions. Spark and Postgres casts do not rename the column.
## Spark
```
scala> spark.sql("select id*2, cast(id as string), name from t").show()
+--------+---+-----+
|(id * 2)| id| name|
+--------+---+-----+
| 2| 1|hello|
| 4| 2| x|
+--------+---+-----+
```
## Postgres
```
postgres=# select id*2, cast(id as varchar(12)), name from t1;
?column? | id | name
----------+----+------
2 | 1 | x
```
## DataFusion
```
❯ select id*2, cast(id as varchar(12)), name from test;
+---------------------------+-----------------------+-------+
| test.id Multiply Int64(2) | CAST(test.id AS Utf8) | name |
+---------------------------+-----------------------+-------+
| 2 | 1 | hello |
+---------------------------+-----------------------+-------+
```
**Describe the solution you'd like**
cast should not change expression name in results
**Describe alternatives you've considered**
None
**Additional context**
None
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