[GitHub] [arrow-datafusion] xudong963 commented on issue #1414: `order by` supports index

[GitBox <gi...@apache.org>]

xudong963 commented on issue #1414:
URL: https://github.com/apache/arrow-datafusion/issues/1414#issuecomment-988087938


   FYI
   
   **postgres**
   ```sql
   postgres=# create table foo (
       a int,
       b int
   );
   CREATE TABLE
   postgres=# insert into foo (a, b) values (1, 2);
   insert into foo (a, b) values (null, 3);
   INSERT 0 1
   INSERT 0 1
   
   postgres=# select a from foo order by 1;
    a
   ---
    1
   
   (2 rows)
   ```
   
   **Datafusion**
   ```sql
   ❯ select column1 from foo order by 1;
   ArrowError(ExternalError(Plan("Sort operation is not applicable to scalar value 1")))
   ```
   


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