[GitHub] flink issue #6188: [FLINK-6846][Table API] add timestampAdd tableApi

[xueyumusic]

Github user xueyumusic commented on the issue:

    https://github.com/apache/flink/pull/6188
  
    Thanks very much for your reivew and guidance, @walterddr @hequn8128 , I 
have made some modification, please have a review when you are free, thanks!


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