[GitHub] [spark] maropu commented on issue #25114: [SPARK-28349][SQL] Add FALSE and SETMINUS to ansiNonReserved

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maropu commented on issue #25114: [SPARK-28349][SQL] Add FALSE and SETMINUS to ansiNonReserved
URL: https://github.com/apache/spark/pull/25114#issuecomment-510537932
 
 
   Is this correct? I don't check carefully check yet, but I think the 'reserved' meaning is essentially different between spark and the other systems. For example, these keyworkds below are reserved in postgresql, but they can be used as alias names;
   ```
   postgres=# select 1 as select;
    select 
   --------
         1
   (1 row)
   
   postgres=# select 1 as from;
    from 
   ------
       1
   (1 row)
   ```

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