Jefffrey commented on issue #2125:
URL: 
https://github.com/apache/arrow-datafusion/issues/2125#issuecomment-1313195720

   Seems to be resolved as of master 96512ac05df40deb42632992cece656842d6debb
   
   Running on datafusion-cli:
   
   ```sql
   DataFusion CLI v14.0.0
   ❯ SELECT 1 as NUMBER union SELECT '1';
   +--------+
   | number |
   +--------+
   | 1      |
   +--------+
   1 row in set. Query took 0.007 seconds.
   ❯ explain verbose SELECT 1 as NUMBER union SELECT '1';
   
+------------------------------------------------------------+-----------------------------------------------------------------------------------+
   | plan_type                                                  | plan          
                                                                    |
   
+------------------------------------------------------------+-----------------------------------------------------------------------------------+
   | initial_logical_plan                                       | Distinct:     
                                                                    |
   |                                                            |   Union       
                                                                    |
   |                                                            |     
Projection: CAST(Int64(1) AS Utf8) AS number                                  |
   |                                                            |       
EmptyRelation                                                               |
   |                                                            |     
Projection: Utf8("1") AS number                                               |
   |                                                            |       
EmptyRelation                                                               |
   | logical_plan after inline_table_scan                       | SAME TEXT AS 
ABOVE                                                                |
   | logical_plan after type_coercion                           | SAME TEXT AS 
ABOVE                                                                |
   | logical_plan after simplify_expressions                    | Distinct:     
                                                                    |
   |                                                            |   Union       
                                                                    |
   |                                                            |     
Projection: Utf8("1") AS number                                               |
   |                                                            |       
EmptyRelation                                                               |
   |                                                            |     
Projection: Utf8("1") AS number                                               |
   |                                                            |       
EmptyRelation                                                               |
   | logical_plan after unwrap_cast_in_comparison               | SAME TEXT AS 
ABOVE                                                                |
   ...
   | logical_plan after projection_push_down                    | SAME TEXT AS 
ABOVE                                                                |
   | logical_plan                                               | Distinct:     
                                                                    |
   |                                                            |   Union       
                                                                    |
   |                                                            |     
Projection: Utf8("1") AS number                                               |
   |                                                            |       
EmptyRelation                                                               |
   |                                                            |     
Projection: Utf8("1") AS number                                               |
   |                                                            |       
EmptyRelation                                                               |
   ...
   54 rows in set. Query took 0.005 seconds.
   ❯
   ```
   
   Probably fixed by https://github.com/apache/arrow-datafusion/pull/3407?


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