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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2019/04/08 03:34:26 UTC

[GitHub] [flink] JingsongLi removed a comment on issue #8102: [FLINK-12087][table-runtime-blink] Introduce over window operators to blink batch

JingsongLi removed a comment on issue #8102: [FLINK-12087][table-runtime-blink] Introduce over window operators to blink batch
URL: https://github.com/apache/flink/pull/8102#issuecomment-480671767
 
 
   > Why `RowSlidingOverFrame` needs a comparator class?
   
   consider sql:
   `order by c range Unbounded PRECEDING and CURRENT ROW`
   The end bound of this frame is range current row, that mean `inputRow` less than or equal to `currentRow` should be included in the window. So the comparator do this comparison.

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