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From rtudoran <...@git.apache.org>
Subject [GitHub] flink issue #4263: [FLINK-6075] - Support Limit/Top(Sort) for Stream SQL
Date Mon, 17 Jul 2017 07:41:32 GMT
Github user rtudoran commented on the issue:

    @fhueske You were the one  that argue that retraction support is needed for offset and
fetch. When we were discussing this i was not into having the retraction. I think finally
it depends on what behavior we want to give for the function. If we have a SELECT x FROM stream
ORDER BY *time FETCH 2 when we emit the new latest data - do we still want to invalidate what
we have emitted previously (in this case we would emit the retraction), otherwise if we consider
that that was the valid input at that point in time - we do not need the retraction. I am
fine either way. Let me know. 

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