jonathf commented on issue #9138:
URL: https://github.com/apache/iceberg/issues/9138#issuecomment-1824362361

   > @jonathf: Always good to know if somebody is interested in a feature, so 
feel free to ask your questions!
   
   I am glad to hear that! And thank you for the swift and in-depth answer.
   
   > [...] I expect that in the next release of Iceberg the feature will be 
supported for Flink 1.16, 1.17 and 1.18
   
   We are on AWS managed Flink application which is currently limited upward to 
1.15. Do you know anything about if or when AWS will update their support?
   
   > The only server side of Iceberg is the REST Catalog implementation, which 
are not affected by this change (and you might use a different Catalog anyway). 
So Flink dependency upgrade is enough.
   
   Good to know.
   
   > You need column metrics for your tables, so please make sure that the file 
statistics are there for the given column (you might need to rewrite the files, 
if they are missing). If the metrics are there, then just enable the watermark 
generation using `watermarkColumn`, and you are ready. If your column type is 
long, you might want to use `watermarkTimeUnit` to define which time unit is 
used to store your event time.
   > 
   > If you have missing statistics, you will get the following exception:
   > 
   > ```
   > Missing statistics for column name = %s in file = %s
   > ```
   
   Thank you. I am not familiar with column metrics in flink. Is there 
documentation on the topic that you can point me to so I may read up on the 
topic?


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