imay commented on issue #794: Use funciton (count and HLL_UNION_AGG) in one column cause doris return wrong value URL: https://github.com/apache/incubator-doris/issues/794#issuecomment-475570811 > Still has some problems: > > <img alt="MacHi 2019-03-22 18-18-42" width="958" src="https://user-images.githubusercontent.com/6831829/54816338-f93cdc00-4cce-11e9-9252-90a0ff1dd76d.png";> @qdore Because your `if` function's second argument is a `bool` type, so this `if` function will return a `bool` type. If you change second argument `count > 1` to `count`, it would be wok
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