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From hequn8128 <...@git.apache.org>
Subject [GitHub] flink issue #5094: [FLINK-8158] [table] Fix rowtime window inner join emits ...
Date Wed, 29 Nov 2017 15:19:06 GMT
Github user hequn8128 commented on the issue:

    Thanks for your replies.
    @fhueske : The watermark must be aligned with timestamps, and it is the main reason why
watermarks are hold back(right?).  Current window join may output a record with timestamp
equals to the earlier **output** watermark(see `testRowTimeJoinWithCommonBounds2 ` in `JoinHarnessTest
    @xccui : I am considering that if we can cache more late records to have a more complete
join result, and this can be achieved by caching both left and right data that is later than
the holding back watermark.


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