On 12/01/2016 11:49 AM, Adrian wrote:
`from_self().exists()` seems to produce an unnecessarily complex query
(still containing all the original columns)


also please see the source for count() re: the original columns:

        col = sql.func.count(sql.literal_column('*'))
        return self.from_self(col).scalar()

replaced with '*'.   a built-in exists() would do something similar.





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