srielau commented on PR #38685:
URL: https://github.com/apache/spark/pull/38685#issuecomment-1321188144
I've some doubts about COLUMN_ALREADY_EXISTS when a column is duplicated
within a new list.
I.e. it makes a lot of sense for ALTER TABLE ADD COLUMN.
But is COLUMN_ALREADY_EXISTS the best choice for CREATE TABLE or WITH
cte(c1, c1) AS?
How about AS T(c1, c1)
I think we would like DUPLICATE_COLUMN_NAME for these case and also include
the table name.
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