akurmustafa commented on PR #13497:
URL: https://github.com/apache/datafusion/pull/13497#issuecomment-2496781966
> and result of those are valid. One thing that just could be noted `VALUES
('name1'), ('name2')` and `VALUES ('name1'), ('name1')` are both regarded as
not constant and not ordered, while single elements of `SELECT 'smth'`
considered as constant
I think, in the case of `SELECT 'smth'`, 'smth' is constant across
partitions. Hence, after `CoalesceBatchesExec`, we will still end up with
constant columns. not sure though
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