>
>Hi Dmitry,
>
>Remove parenthesis around CATEGORY in the SELECT list, it makes the column reference to be treated as an expression. Note that ORDER BY first looks for columns in tables and only then for columns with alias in result. It finds CATEGORY in MYTABLE. DISTINCT requires this column to be in SELECT list, but query processor fails to find it because it is "wrapped" as an expression. We will consider to fix this issue.
>
>Thanks,
>Aleksey.
Hi Aleksey,
Thank you for the explanation and for the suggestion. Now I understand why when I changed to ORDER BY 1, the error disappeared.
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